bq20z70 + bq29330 Chipset Technical Reference Manual Literature Number: SLUU250A June 2006 - Revised June 2006 2 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Contents 1 2 Preface ..................................................................................................................... 7 1.1 Read this First ....................................................................................................... 7 1.2 Notational Conventions ............................................................................................ 7 ................................................................................................... 9 1st Level Protection Features ..................................................................................... 9 2.1.1 Cell Overvoltage and Cell Undervoltage ................................................................ 9 2.1.2 Charge and Discharge Overcurrent .................................................................... 12 2.1.3 Short-Circuit Protection .................................................................................. 16 2.1.4 Overtemperature Protection ............................................................................ 17 2.1.5 AFE Watchdog............................................................................................ 18 2nd Level Protection Features ................................................................................... 18 2.2.1 2nd Level (Permanent) Failure Actions................................................................ 19 2.2.2 Time Limit Based Protection ............................................................................ 19 2.2.3 Limit based Protection ................................................................................... 21 2.2.4 Clearing Permanent Failure ............................................................................. 22 Gas Gauging ....................................................................................................... 22 2.3.1 Impedance Track Configuration ........................................................................ 22 2.3.2 Gas Gauge Modes ....................................................................................... 23 2.3.3 Qmax....................................................................................................... 26 Charge Control .................................................................................................... 27 2.4.1 Charge Control SMBus Broadcasts .................................................................... 29 2.4.2 Cell Balancing ............................................................................................ 29 2.4.3 Charge Inhibit Mode ..................................................................................... 30 2.4.4 Charge Suspend Mode .................................................................................. 32 2.4.5 Precharge ................................................................................................. 34 2.4.6 Fast Charge ............................................................................................... 35 2.4.7 Primary Charge Termination ............................................................................ 36 2.4.8 Charging Faults ........................................................................................... 36 2.4.9 Discharge and Charge Alarms ......................................................................... 37 Device Operating Mode .......................................................................................... 39 2.5.1 Normal Mode.............................................................................................. 39 2.5.2 Battery Pack Removed Mode/System Present Detection .......................................... 39 2.5.3 Sleep Mode ............................................................................................... 39 2.5.4 Wake Function ............................................................................................ 40 2.5.5 Shutdown Mode .......................................................................................... 41 Security (Enables and Disables Features) ..................................................................... 41 Calibration .......................................................................................................... 43 2.7.1 Coulomb Counter Dead Band .......................................................................... 43 2.7.2 Auto Calibration........................................................................................... 43 Communications ................................................................................................... 43 2.8.1 SMBus On and Off State ................................................................................ 43 2.8.2 Packet Error Checking ................................................................................... 43 2.8.3 bq20z70 Slave Address ................................................................................. 43 2.8.4 Broadcasts to Smart Charger and Smart Battery Host .............................................. 44 Detailed Description 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Contents 3 A Standard SBS Commands A.1 ......................................................................................... 45 ManufacturerAccess(0x00)....................................................................................... 45 A.1.1 System Data .............................................................................................. 45 A.1.2 System Control ........................................................................................... 47 A.1.3 Extended SBS Commands.............................................................................. 50 A.2 RemainingCapacityAlarm(0x01) ................................................................................. 50 A.3 RemainingTimeAlarm(0x02) ..................................................................................... 50 A.4 BatteryMode(0x03) ................................................................................................ 51 A.5 AtRate(0x04) ....................................................................................................... 53 A.6 AtRateTimeToFull(0x05) A.7 AtRateTimeToEmpty(0x06) ...................................................................................... 54 A.8 AtRateOK(0x07) ................................................................................................... 55 A.9 Temperature(0x08) ................................................................................................ 55 A.10 Voltage(0x09) ...................................................................................................... 55 A.11 Current(0x0a) ...................................................................................................... 55 A.12 AverageCurrent(0x0b) ............................................................................................ 56 A.13 MaxError(0x0c) .................................................................................................... 56 A.14 RelativeStateOfCharge(0x0d) A.15 AbsoluteStateOfCharge(0x0e) ................................................................................... 57 A.16 RemainingCapacity(0x0f) 57 A.17 FullChargeCapacity(0x10) 58 A.18 A.19 A.20 A.21 A.22 A.23 A.24 A.25 A.26 A.27 A.28 A.29 A.30 A.31 A.32 A.33 A.34 A.35 A.36 B ................................................................................... ........................................................................................ ....................................................................................... RunTimeToEmpty(0x11) ......................................................................................... AverageTimeToEmpty(0x12) .................................................................................... AverageTimeToFull(0x13) ........................................................................................ ChargingCurrent(0x14) ........................................................................................... ChargingVoltage(0x15) ........................................................................................... BatteryStatus(0x16) ............................................................................................... CycleCount(0x17) ................................................................................................. DesignCapacity(0x18) ............................................................................................ DesignVoltage(0x19).............................................................................................. SpecificationInfo(0x1a) ........................................................................................... ManufactureDate(0x1b) .......................................................................................... SerialNumber(0x1c) ............................................................................................... ManufacturerName(0x20) ........................................................................................ DeviceName(0x21) ................................................................................................ DeviceChemistry(0x22) ........................................................................................... ManufacturerData(0x23).......................................................................................... Authenticate(0x2f) ................................................................................................. CellVoltage4..1(0x3c..0x3f) ...................................................................................... SBS Command Values ........................................................................................... 54 57 58 58 59 59 59 60 61 61 62 62 62 63 63 64 64 64 65 65 65 ......................................................................................... 67 AFEData(0x45) .................................................................................................... 67 FETControl(0x46) ................................................................................................. 67 StateOfHealth(0x4f) ............................................................................................... 68 SafetyStatus(0x51) ................................................................................................ 68 PFStatus(0x53) .................................................................................................... 69 OperationStatus(0x54) ............................................................................................ 70 ChargingStatus(0x55)............................................................................................. 70 Extended SBS Commands B.1 B.2 B.3 B.4 B.5 B.6 B.7 4 ......................................................................................... Contents SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback ResetData(0x57) B.9 WDResetData(0x58) .............................................................................................. 71 B.10 PackVoltage(0x5a) ................................................................................................ 71 B.11 AverageVoltage(0x5d) ............................................................................................ 71 B.12 UnSealKey(0x60) .................................................................................................. 71 B.13 FullAccessKey(0x61) B.14 PFKey(0x62) ....................................................................................................... 72 B.15 AuthenKey3(0x63) 72 B.16 AuthenKey2(0x64) 72 B.17 B.18 B.19 B.20 B.21 B.22 B.23 C .................................................................................................. B.8 ................................................................................................ ................................................................................................ AuthenKey1(0x65) ................................................................................................ AuthenKey0(0x66) ................................................................................................ ManufacturerInfo(0x70) ........................................................................................... SenseResistor(0x71).............................................................................................. DataFlashSubClassID(0x77) ..................................................................................... DataFlashSubClassPage1..8(0x78..0x7f) ...................................................................... Extended SBS Command Values ............................................................................... Data Flash C.1 ............................................................................................. 70 72 73 73 73 73 74 74 74 ............................................................................................................... 77 Accessing Data Flash............................................................................................. 77 ..................................................................................... 77 C.1.2 Reading a SubClass ..................................................................................... 78 C.1.3 Writing a SubClass ....................................................................................... 78 C.1.4 Example ................................................................................................... 78 1st Level Safety Class ............................................................................................ 79 C.2.1 Voltage (Subclass 0) ..................................................................................... 79 C.2.2 Current (Subclass 1) ..................................................................................... 81 C.2.3 Temperature (Subclass 2) .............................................................................. 85 2nd Level Safety................................................................................................... 87 C.3.1 Voltage (Subclass 16) ................................................................................... 87 C.3.2 Current (Subclass 17) ................................................................................... 89 C.3.3 Temperature (Subclass 18) ............................................................................. 91 C.3.4 FET Verification (Subclass 19) ......................................................................... 92 C.3.5 AFE Verification (Subclass 20) ......................................................................... 93 Charge Control .................................................................................................... 93 C.4.1 Charge Inhibit Cfg (Subclass 32)....................................................................... 93 C.4.2 Pre-Charge Cfg (Subclass 33) ......................................................................... 94 C.4.3 Fast Charge Cfg (Subclass 34) ........................................................................ 95 C.4.4 Termination Cfg (Subclass 36) ......................................................................... 97 C.4.5 Cell Balancing Cfg (Subclass 37) ...................................................................... 98 C.4.6 Charging Faults (Subclass 38) ......................................................................... 98 SBS Configuration................................................................................................. 99 C.5.1 Data (Subclass 48) ....................................................................................... 99 C.5.2 Configuration(Subclass 49) ............................................................................ 103 System Data ...................................................................................................... 105 C.6.1 Manufacturer Info (Subclass 58) ...................................................................... 105 Configuration ..................................................................................................... 105 C.7.1 Registers (Subclass 64) ............................................................................... 105 Power .............................................................................................................. 111 C.8.1 Power (Subclass 68) ................................................................................... 111 C.1.1 Data Flash Interface C.2 C.3 C.4 C.5 C.6 C.7 C.8 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Contents 5 C.9 Gas Gauging ..................................................................................................... 113 C.9.1 IT Cfg (Offset 80) ....................................................................................... 113 C.10 C.11 C.12 C.13 D ....................................................................... ........................................................................................ Ra Table .......................................................................................................... C.10.1 R_a0 (Subclass 88) ................................................................................... C.10.2 R_a1 (Subclass 89) ................................................................................... C.10.3 R_a2 (Subclass 90) ................................................................................... C.10.4 R_a3 (Subclass 91) ................................................................................... C.10.5 R_a0x (Subclass 92) .................................................................................. C.10.6 R_a1x (Subclass 93) .................................................................................. C.10.7 R_a2x (Subclass 94) .................................................................................. C.10.8 R_a3x (Subclass 95) .................................................................................. PF Status ......................................................................................................... C.11.1 Device Status Data (Subclass 96) .................................................................. Calibration ........................................................................................................ C.12.1 Data (Subclass 104) .................................................................................. C.12.2 Config (Subclass 105) ................................................................................ C.12.3 Temp Model (Subclass 106) ......................................................................... C.12.4 Current (Subclass 107) ............................................................................... DataFlash Values ................................................................................................ C.9.2 Current Thresholds (Offset 81) 116 C.9.3 State (Offset 82) 117 Glossary 118 118 119 120 121 122 123 124 125 126 126 127 127 130 132 133 134 ................................................................................................................ 141 Revision History ............................................................................................................... 143 Index ............................................................................................................................... 144 6 Contents SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Chapter 1 SLUU250A - June 2006 - Revised June 2006 Preface 1.1 Read this First This manual discusses modules and peripherals of the bq20z70 device and the use with the bq29330 device to build a complete battery pack gas gauge and protection solution. 1.2 Notational Conventions Following notation is used, if SBS commands and Dataflash values are mentioned within a text block: * SBS commands are set in italic, e.g.: Voltage * SBS bits and flags are capitalized, set in italic and enclosed with square brackets, e.g.: [PRES] * DataFlash values are set in bold italic e.g.: COV Threshold * All Dataflash bits and flags are capitalized, set in bold italic and enclosed with square brackets, e.g.: [NR] All SBS commands, Dataflash values and flags mentioned in a chapter are listed at the end of each chapter for reference. The reference format for SBS commands is: SBS:Command Name(Command No.):Manufacturer Access(MA No.)[Flag], for example: SBS:Voltage(0x09), or SBS:ManufacturerAccess(0x00):Seal Device(0x0020) The reference format for dataflash values is: DF:Class Name:Subclass Name(Subclass ID):Value Name(Offset)[Flag], for example: DF:1st Level Safety:Voltage(0):COV Threshold(0), or DF:Configuration:Registers(64):Operation A Cfg(0)[SLEEP]. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Preface 7 www.ti.com Notational Conventions 8 Preface SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Chapter 2 SLUU250A - June 2006 - Revised June 2006 Detailed Description 2.1 1st Level Protection Features The bq20z70 supports a wide range of battery and system protection features that are easily configured via the integrated data flash. 2.1.1 Cell Overvoltage and Cell Undervoltage The bq20z70 can detect cell overvoltage/undervoltage and protect battery cells from damage from battery cell overvoltage/undervoltage. If Voltage remains over/under the corresponding thresholds for a period of 2s, the bq20z70 goes into pack overvoltage/undervoltage condition and switches off the CHG/DSG FET. The bq20z70 recovers from a cell overvoltage condition if all the cell voltages drop below the cell overvoltage recovery threshold. The bq20z70 recovers from cell undervoltage condition if all the cell voltages rise above the cell undervoltage recovery threshold. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 9 10 Detailed Description [COV] SafetStatus Stop & Reset Timer Charging Disabled Discharging Allowed COV Condition Any CellVoltage4..1 COV Threshold AND Timer 2s All CellVoltage4..1 < COV Recovery Stop & Reset Timer Cell Voltages within Limit All CellVoltage4..1 > CUV Recovery Any CellVoltage4..1 CUV Threshold AND Timer 2s CUV Condition [CUV] SafetStatus Stop & Reset Timer Charging Allowed Discharging Disabled www.ti.com 1st Level Protection Features Figure 2-1. COV and CUV SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 1st Level Protection Features Table 2-1. COV and CUV Condition: Flags: COV Condition Normal BatteryStatus [TCA] [TDA], [FD] SafetyStatus [COV] [CUV] OperationStatus FET: SBS Command: CUV Condition [XDSG] CHG FET disabled, enabled during discharge normal DSG FET disabled, enabled during charge ChargingCurrent 0 charging algorithm Pre-chg Current ChargingVoltage 0 charging algorithm charging algorithm The bq20z70 indicates cell over voltage condition by setting the [COV] flag in SafetyStatus if any CellVoltage4..1 reaches or surpasses the COV Threshold limit during charging and stays above COV Threshold limit for 2s. In cell over voltage condition, charging is disabled, CHG FET and ZVCHG FET (if used) are turned off, ChargingCurrent and ChargingVoltage are set to zero, [TCA] flag in BatteryStatus and [COV] flag in SafetyStatus are set. The bq20z70 recovers from cell over voltage condition if all CellVoltages4..1 are equal to or lower than COV Recovery limit. On recovery the [COV] flag in SafetyStatus is reset, [TCA] flag is reset, and ChargingCurrent and ChargingVoltage are set back to appropriate value per the charging algorithm. In cell over voltage condition the CHG FET is turned on during discharging to prevent overheating of the CHG FET body diode. The bq20z70 indicates cell under voltage by setting the [CUV] flag in SafetyStatus if any CellVoltage4..1 reaches or drops below the CUV Threshold limit during discharging and stays below CUV Threshold limit for 2s. In cell under voltage condition, discharging is disabled and DSG FET is turned off and ZVCHG FET (if used) is turned on, ChargingCurrent is set to Pre-chg Current, [TDA] and [FD] flags in BatteryStatus and the [CUV] flag in SafetyStatus are set. The bq20z70 recovers from cell under voltage condition if all CellVoltages4..1 are equal to or higher than CUV Recovery limit. On recovery the [CUV] flag in SafetyStatus is reset, [XDSG] flag is reset, the [TDA] and [FD] flags are reset, and ChargingCurrent and ChargingVoltage are set back to appropriate value per the charging algorithm. In cell under voltage condition, the DSG FET is turned on during charging to prevent overheating of the DSG FET body diode. Related Variables: * DF:1st Level Safety:Voltage(0):COV Threshold(0) * DF:1st Level Safety:Voltage(0):COV Recovery(3) * DF:1st Level Safety:Voltage(0):CUV Threshold(12) * DF:1st Level Safety:Voltage(0):CUV Recovery(15) * DF:Charge Control:Pre-Charge Cfg(33):Pre-chg Current(0) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[TCA],[TDA],[FD],[DSG] * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:SafetyStatus(0x51)[CUV],[COV] * SBS:OperationStatus(0x54)[XDSG] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 11 www.ti.com 1st Level Protection Features 2.1.2 Charge and Discharge Overcurrent The bq20z70 has overcurrent protection for charge and discharge. This requires that the Current value to be greater than or equal to a programmed OC Threshold in either charge or discharge current for a period greater than 2s. Table 2-2. Charge and Discharge Overcurrent Protection OC Threshold OC Time Limit OC Recovery Threshold Tier-1 Charge OC (1st Tier)Chg 2s 100mA Tier-1 Discharge OC (1st Tier) Dsg 2s -100mA Tier-3 Discharge AFE OC Dsg AFE OC Dsg Time -100mA for Current Recovery Time SafetyStatus Flag [OCC] [OCD] [AOCD] Current within Limit Stop & Reset Timer Current OC Threshold AND Timer 2s OC Condition AverageCurrent 100mA AND Timer Current Recovery Time SafetyStatus Flag set Stop & Reset Timer Reinsert Battery Pack [PRES] transitions from 0 to 1 [NR] = 1 AND AverageCurrent > 100mA AND Timer < Current Recovery Time [NR] = 1 AND Current 100mA [NR] = 0 AND [PRES] transitions from 1 to 0 AND Nonremovable Configuration Condition bit not set Nonremovable Recovery Start Timer wait AverageCurrent 100mA Pack Removed [PRES] = 0 Figure 2-2. OC Protection For overcurrent protection, the specific flag in SafetyStatus is set if the Current stays above the OC Threshold limit for at least 2s. After 2s of excessive current detection during charging, the CHG FET is turned off and ZVCHG FET (if used) is turned off. When this occurs, the internal AFE_Current_Fault timer is started from 0, ChargingCurrent and ChargingVoltage are set to 0, [TCA] flag is set and [OCC] flag is set. However, when the bq20z70 has [OCC] flag in SafetyStatus set, the CHG FET is turned on again during discharge ( Current (-) Dsg Current Threshold). This prevents overheating of the CHG FET body diode during discharge. No other flags change state until full recovery is reached. This action is not affected by the setting of [NR] flag. After 2s of excessive current detection during discharging, the DSG FET is turned off and the ZVCHG FET (if used) is turned on. When this occurs the AFE_Current_Fault timer is started from 0, ChargingCurrent is set to Pre-chg Current, [XDSG] flag is set, [TDA] flag is set, and [OCD] flag is set. 12 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 1st Level Protection Features When the bq29330 detects a discharge-overcurrent fault, the charge and discharge FETs are turned off, the XALERT pin of the bq20z70 is driven low by the XALERT pin of the bq29330, and the bq29330 is interrogated. When the bq20z70 identifies the overcurrent condition, the AFE_Current_Fault timer is started from 0, [TDA] flag is set, ChargingCurrent is set to 0, and [AOCD] is set. However, when the bq20z70 has either [OCD], [AOCD] set, the DSG FET is turned on again during charging ( Current Chg Current Threshold). This prevents overheating of the discharge-FET body diode during charge. No other flags change state until full recovery is reached. This action is not affected by the state of [NR] bit. Table 2-3. Overcurrent Conditions Protection Condition Flags Tier-1 Charge OC Condition [OCC] [TCA] Tier-1 Discharge OC Condition [OCD] [TDA] Tier-3 Discharge OC Condition [AOCD] [TDA] SafetyStatus BatteryStatus FET Charging Current Charging Voltage CHG FET disabled, enabled during discharge 0 0 [XDSG] DSG FET disabled, enabled during charge Pre-chg Current charging algorithm [XDSG] CHG FET and DSG FET disabled 0 charging algorithm OperationStatus The bq20z70 can individually configure each overcurrent-protection feature to recover via two different methods based on [NR] bit. Standard Recovery, when [NR] = 0 and the overcurrent tier is not selected in Non-Removable Cfg register. When the pack is removed and reinserted the condition is cleared. Pack removal and reinsertion is detected by a low-to-high-to-low transition on the PRES input. When the overcurrent tier is selected in Non-Removable Cfg, that particular feature uses the Non-Removable Battery Mode recovery. Non-removable Battery Mode Recovery when [NR] = 1. The state of Non-Removable Cfg has no consequence. This recovery requires AverageCurrent to be 100mA during charging and AverageCurrent to be (-) 100mA during discharging, and for the AFE_Current_Fault timer Current Recovery Time. When a charging-fault recovery condition is detected, then the CHG FET is allowed to be turned on, if other safety and configuration states permit, [TCA] is reset, ChargingCurrent and ChargingVoltage are set to the appropriate value per the charging algorithm, and the appropriate SafetyStatus flag is reset. When a discharging-fault recovery condition is detected, the DSG FET is allowed to be turned on if other safety and configuration states permit, [TDA] flag is reset, ChargingCurrent and ChargingVoltage are set to the appropriate value per the charging algorithm and the [XDSG] and the appropriate SafetyStatus flag is reset. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 13 www.ti.com 1st Level Protection Features Discharge Current AFE SC Dsg Cfg Bit3 - Bit0 AFE Hardware Protection AFE SC DSG AFE OC DSG AFE OC Dsg nd Gas Gauge Software Protection (1 second update interval) 2 Level SOC DSG SOC Dsg st 1 Level OC (1st Tier) Dsg 2s SOC Dsg Time (1s - 60s) AFE OC Dsg Time (1ms - 31ms) AFE SC Dsg Cfg Bit7 - Bit4 (0s - 915s) OC (1st Tier) Dsg time Figure 2-3. Overcurrent Protection Levels 14 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 1st Level Protection Features Discharge Current below AFE Limit AFE detects over current discharge fault AFE Fault Condition Charging Disabled Discharging Disabled AverageCurrent > (-)100mA AND Timer Current Recovery Time Gas Gauge identifies over current condition AOCD Condition Charging Allowed Discharging Disabled [DSG] = 1 AND AverageCurrent > (-)100mA [DSG] = 1 AND AverageCurrent (-) 100mA AND Timer < Current Recovery Time Nonremovable Recovery Start Timer wait AverageCurrent > (-) 100mA Reinsert Battery Pack [PRES] transitions from 0 to 1 [DSG] = 0 AND [PRES] transitions from 1 to 0 AND [AOCD] not set in Nonremovable Configuration Pack Removed [PRES] = 0 Figure 2-4. AFE Discharge Over Current Protection Related Variables: * DF:1st Level Safety:Current(1):OC(1st Tier) Chg(0) * DF:1st Level Safety:Current(1):OC(1st Tier) Dsg(5) * DF:1st Level Safety:Current(1):Current Recovery Time(16) * DF:1st Level Safety:Current(1):AFE OC Dsg(17) * DF:1st Level Safety:Current(1):AFE OC Dsg Time(18) * DF:Charge Control:Pre-Charge Cfg(33):Pre-chg Current(0) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 15 www.ti.com 1st Level Protection Features * * * * * * * * DF:Configuration:Registers(64):Non-Removable Cfg(8) SBS:Current(0x0a) SBS:AverageCurrent(0x0b) SBS:ChargingCurrent(0x14) SBS:ChargingVoltage(0x15) SBS:BatteryStatus(0x16)[TCA],[TDA] SBS:SafetyStatus(0x51)[OCC],[OCD],[AOCD] SBS:OperationStatus(0x54)[XDSG] 2.1.3 Short-Circuit Protection The bq20z70 short-circuit protection is controlled by the bq29330, but is recovered by the bq20z70. This allows different recovery methods to accommodate various applications. The bq29330 charge short-circuit and discharge short-circuit protection are configured by the bq20z70 dataflash AFE SC Chg Cfg and AFE SC Dsg Cfg registers, respectively. When the bq29330 detects a short circuit in charge or short circuit in discharge fault, the charge and discharge FETs are turned off, the XALERT pin of the bq20z70 is driven low by the XALERT pin of the bq29330 and the bq29330 is interrogated. When the bq20z70 identifies the short-circuit condition (charge or discharge current direction), the internal AFE_Current_Fault timer is started from 0, either [TCA] or [TDA] battery status is set, ChargingCurrent and ChargingVoltage is set to 0 and either [SCC] or [SCD] is set. If the short-circuit condition is in discharge, then [XDSG] flag is also set. However, when the bq20z70 has [SCC] flag in SafetyStatus set, the CHG FET is turned on again during discharge ( Current (-) Dsg Current Threshold). This prevents overheating of the CHG FET body diode during discharge. Also, when the bq20z70 has [SOD] set, the DSG FET is turned on again during charging ( Current Chg Current Threshold). This prevents overheating of the discharge-FET body diode during charge. No other flags change state until full recovery is reached. This action is not affected by the setting of [NR] flag. Each bq20z70 short-circuit protection feature can be individually configured to recover via two different methods, based on [NR] flag. Standard Recovery is when [NR] = 0 and the overcurrent tier is not selected in Non-Removable_Cfg. When the pack is removed and re-inserted, the condition is cleared. Pack removal and re-insertion is detected by transition on the PRES input from low to high to low. When the overcurrent tier is selected in Non-Removable Cfg, that particular feature uses the Nonremovable Battery Mode recovery. Nonremovable Battery Mode Recovery is when [NR] = 1. The state of Non-Removable Cfg has no consequence when [NR] flag is set to 1. This recovery requires, during charging AverageCurrent to be 5mA, during discharging AverageCurrent to be (-) 5mA and for the internal AFE_Current_Fault timer to be Current Recovery Time. When the recovery condition for a charging fault is detected, the CHG FET is allowed to be turned on if other safety and configuration states permit. The ZVCHG FET also returns to previous state. When this occurs, [TCA] is reset, ChargingCurrent and ChargingVoltage are set to the appropriate values per the charging algorithm, and the appropriate SafetyStatus flag is reset. When the recovery condition for a discharging fault is detected, the DSG FET is allowed to be turned on if other safety and configuration states permit. The ZVCHG FET also returns to previous state. When this occurs [TDA] is reset, ChargingCurrent and ChargingVoltage are set to the appropriate value per the charging algorithm, and [XDSG] and the appropriate SafetyStatus flags are reset. Table 2-4. Short Circuit Protection 16 Short Circuit Condition Flags set FET Charge AFE SC Chg Cfg [SCC]SafetyStatus, [TCA] CHG FET disabled, enabled during discharge Detailed Description Charging Current 0 Charging Voltage 0 Clear Threshold 5mA SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 1st Level Protection Features Table 2-4. Short Circuit Protection (continued) Short Circuit Condition Flags set FET Charging Current Discharge AFE SC Dsg Cfg [SCD]SafetyStatus, [TDA], [XDSG] DSG FET disabled, enabled during charge Charging Voltage 0 0 Clear Threshold -5mA Related Variables: * DF:1st Level Safety:Current(1):AFE SC Chg Cfg(21) * DF:1st Level Safety:Current(1):AFE SC Dsg Cfg(22) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * DF:Configuration:Registers(64):Non-Removable Cfg(8) * SBS:AverageCurrent(0x0b) * SBS:BatteryStatus(0x16)[TCA],[TDA] * SBS:SafetyStatus(0x51)[SCC],[SCD] * SBS:OperationStatus(0x54)[XDSG] 2.1.4 Overtemperature Protection The bq20z70 has overtemperature protection for both charge and discharge conditions. The bq20z70 sets the over temperature charging [OTC] SafetyStatus flag, if pack temperature reaches or surpasses Over Temp Chg limit during charging for a 2s time period. If [OTFET] is set and bq20z70 is in [OTC] condition, charging is disabled and CHG FET is turned off, ZVCHG FET (if used) is turned off, ChargingCurrent and ChargingVoltage is set to zero, [TCA] flag and [OTC] SafetyStatus are set. In an [OTC] condition, the CHG FET is turned on again during discharge ( Current (-) Dsg Current Threshold) to prevent overheating of the CHG FET body diode. The bq20z70 recovers from an [OTC] condition, if Temperature is OTC Chg Recovery limit. On recovery [OTC] SafetyStatus is reset, [TCA] is reset, ChargingCurrent and ChargingVoltage are set back to their appropriate value per charging algorithm, and CHG FET returns to previous state. The bq20z70 sets the over temperature discharging [OTD] SafetyStatus flag, if pack temperature reaches or surpasses Over Temp Dsg limit during discharging for a 2s time period. If [OTFET] is set and bq20z70 is in [OTD] condition, discharging is disabled and DSG FET is turned off, ChargingCurrent is set to zero, [TDA] flag is set, [XDSG] flag is set and [OTD] flag in SafetyStatus is set. In an [OTD] condition, the DSG FET is turned on during charging ( Current Chg Current Threshold) to prevent overheating of the DSG FET body diode. The bq20z70 recovers from an [OTD] condition, if pack temperature is OTD Chg Recovery limit. On recovery [OTD] SafetyStatus is reset, [TDA] is reset, ChargingCurrent is set back to their appropriate value per charging algorithm, and DSG FET is allowed to switch on again. Table 2-5. Overtemperature Protection Charge Discharge Overtemp Threshold Time Limit Over Temp Chg 2s Over Temp Dsg SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback 2s Overtemp Condition Recovery Threshold [OTC] SafetyStatus Flag, [TCA] set, ChargingCurrent =0, ChargingVoltage = 0, (CHG FET off if [OTFET] set) OT Chg Recovery [OTD] SafetyStatus Flag, [TDA] Set, ChargingCurrent =0, ( [XDSG] set and DSG FET off if [OTFET] flag set) OT Dsg Recovery Detailed Description 17 www.ti.com 2nd Level Protection Features Related Variables: * DF:1st Level Safety:Temperature(2):Over Temp Chg(0) * DF:1st Level Safety:Temperature(2):OT Chg Recovery(3) * DF:1st Level Safety:Temperature(2):Over Temp Dsg(5) * DF:1st Level Safety:Temperature(2):OT Dsg Recovery(8) * DF:Configuration:Registers(64):Operation Cfg B(2)[OTFET] * SBS:Temperature(0x08) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[TCA],[TDA] * SBS:SafetyStatus(0x51)[OTC],[OTD] * SBS:OperationStatus(0x54)[XDSG] 2.1.5 AFE Watchdog The bq29330 automatically turns off the CHG FET, DSG FET and ZVCHG FET (if used), if the bq29330 does not receive the appropriate frequency on the WDI pin from bq20z70. The bq20z70 has no warning that this is about to happen, but it can report the occurrence once the bq20z70 is able to interrogate the bq29330. When the XALERT input of the bq20z70 is triggered by the XALERT pin of the bq29330, the bq20z70 reads the STATUS register of the bq29330. If [WDF] is set, the bq20z70 also sets [WDF] in SafetyStatus and periodic verification of the bq29330 RAM is undertaken. If verification of the bq29330 RAM fails then the FETs will turn off. Verification of the bq29330 RAM will continue once every second. If the periodic verification passes, then [WDF] in SafetyStatus is cleared and the FETs return to normal operation. Related Variables: * SBS:SafetyStatus(0x51)[WDF] 2.2 2nd Level Protection Features The bq20z70 provides features that can be used to indicate a more serious fault via the SAFE output. This output can be used to blow an in-line fuse to permanently disable the battery pack from charge or discharge activity. If any PF Threshold condition is met, then bq20z70 goes into permanent failure condition and the appropriate flag is set in PFStatus. When any NEW cause of a permanent failure is set in PFStatus function, the NEW cause is added to PF Flags 1 register. This allows PF Flags 1 register to show ALL permanent failure conditions that have occurred. On the first occasion of a permanent failure indicated by PFStatus change from 0x00, the PFStatus value is stored in PF Flags 2. 18 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 2nd Level Protection Features PF Condition CHG, DSG, ZVCHG FET turns off [TCA] flag set, [TDA] flag set DataFlash Access Readonly ChargingCurrent= 0 ChargingVoltage = 0 If bit in Permanent Fail Cfgis set, drive SAFE pin high and[PF] flag in SafetyStatus is set (Monitored Value PF Threshold AND Timer PF Time Limit) OR (AFE_Fail_Counter AFE_Fail_Limit ) Write lower part of PFKey + higher part of PFKey to ManufacturerAccess PF Time Limit Start Timer wait Monitored Value < PF Threshold OR AFE_Fail_Counter = 0 Monitored Value PF Threshold No PF Stop & Reset Timer Start AFE Timer Decrement AFE_Fail_C ounter Monitored Value PF Threshold OR AFE_Fail_Counter > 0 AFE Timer 20s Figure 2-5. 2nd Level Protection 2.2.1 2nd Level (Permanent) Failure Actions When the PFStatus register changes from 0x00 to indicate a permanent failure then the following actions are taken in sequence. * CHG, DSG, and ZVCHG FETs are turned OFF. * [TCA], [TDA] flags in BatteryStatus are set. * Data Flash write access is then disabled, but the data flash can be read. * ChargingCurrent and ChargingVoltage are set to 0. * The appropriate bit in PF Flags 1 is set. * If the appropriate bit in Permanent Fail Cfg is set, the SAFE pin is driven and latched high. The[PF] flag in SafetyStatus is also set. Related Variables: * DF:Configuration:Registers(64):Permanent Fail Cfg(6) * DF:PF Status:Device Status Data(96):PF Flags 1(0) * DF:PF Status:Device Status Data(96):PF Flags 2(28) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[TCA],[TDA] * SBS:SafetyStatus(0x51)[PF] * SBS:PFStatus(0x53) 2.2.2 Time Limit Based Protection bq20z70 reports a 2nd level protection by setting the appropriate flag in the PFStatus function if the monitored value reaches or rises above the Protection Threshold for a period of Max Alert duration. See the table for all Protection Thresholds and Max Alert durations. Safety Overvoltage Protection -- The bq20z70 monitors the pack voltage for extreme values. Cell Imbalance Fault -- The bq20z70 starts cell imbalance fault detection when Current is lesser or equal to Cell Imbalance Current for Battery Rest Time period. The difference between highest cell voltage and lowest cell voltage is monitored. If Battery Rest Time is set to zero or Cell Imbalance Time is set to zero, this function is disabled. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 19 www.ti.com 2nd Level Protection Features 2nd Level Protection IC Input -- The PFIN input of the bq20z70 can be used to determine the state of an external protection device such as the bq294xx. The bq20z70 watches for PFIN pin being driven low by an external device. Safety Overcurrent Protection -- The bq20z70 monitors the current during charging and discharging. The overcurrent thresholds and time limits can be set independently for charging and discharging. Safety Overtemperature Protection -- The bq20z70 monitors the pack temperature during charging and discharging. The overtemperature thresholds and time limits can be set independently for charging and discharging. Charge and Zero-Volt Charge FET Fault Protection -- The bq20z70 monitors if there is, at any time, an attempt to turn off the CHG FET or ZVCHG FET or the CHG bit in the bq29330 OUTPUT register is set and the current still continues to flow. Discharge FET Fault Protection -- The bq20z70 monitors if there is, at any time, an attempt to turn off the DSG FET or the DSG bit in the bq29330 OUTPUT register is set and the current still continues to flow. Table 2-6. Time Limit Based 2nd Level Protection Protection Monitored Value Requirement PF Threshold PF Time Limit (set to 0 to disable Protection) PFStatus Flag Permanent F ail Cfg Flag Safety Overvoltage Voltage - SOV Threshold SOV Time [SOV] [XSOV] Cell Imbalance Fault Difference of highest and lowest of CellVoltage4..1 Current Cell Imbalance Current for Battery Rest Time Cell Imbalance Fail Voltage Cell Imbalance Time [CIM] [XCIM] 2nd Level Protection IC Input PFIN pin - PFIN pin low PFIN Detect Time [PFIN] [XPFIN] Safety Overcurrent Charge Current Current > 0 SOC Chg SOC Chg Time [SOCC] [XSOCC] Safety Overcurrent Discharge (-)Current Current < 0 SOC Dsg SOC Dsg Time [SOCD] [XSOCD] Safety Overtemperature Chg Temperature Current > 0 SOT Chg SOT Chg Time [SOTC] [XSOTC] Safety Overtemperature Dsg Temperature Current < 0 SOT Dsg SOT Dsg Time [SOTD] [XSOTD] Charge and Zero-Volt Charge FET Fault Current (CHG FET or ZVCHG FET turn off attempt or CHG Flag in bq29330 OUTPUT register set) and Current >0 50mA FET Fail Time [CFETF] [XCFETF] Discharge FET Fault (-)Current (DSG FET turn off attempt (-)50mA or DSG Flag in bq29330 OUTPUT register set) and Current < 0 FET Fail Time [DFETF] [XDFETF] Related Variables: * DF:2nd Level Safety:Voltage(16):SOV Threshold(0) * DF:2nd Level Safety:Voltage(16):SOV Time(2) * DF:2nd Level Safety:Voltage(16):Cell Imbalance Current(3) * DF:2nd Level Safety:Voltage(16):Cell Imbalance Fail Voltage(4) * DF:2nd Level Safety:Voltage(16):Cell Imbalance Time(6) * DF:2nd Level Safety:Voltage(16):Battery Rest Time(7) * DF:2nd Level Safety:Voltage(16):PFIN Detect Time(9) * DF:2nd Level Safety:Current(17):SOC Chg(0) * DF:2nd Level Safety:Current(17):SOC Chg Time(2) * DF:2nd Level Safety:Current(17):SOC Dsg(3) * DF:2nd Level Safety:Current(17):SOC Dsg Time(5) * DF:2nd Level Safety:Temperature(18):SOT Chg(0) 20 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 2nd Level Protection Features * * * * * * * * * * * * * DF:2nd Level Safety:Temperature(18):SOT Chg Time(2) DF:2nd Level Safety:Temperature(18):SOT Dsg(3) DF:2nd Level Safety:Temperature(18):SOT Dsg Time(5) DF:2nd Level Safety:FET Verification(19):FET Fail Time(2) DF:Configuration:Registers(64):Permanent Fail Cfg(6) DF:PF Status:Device Status Data(96):PF Flags 1(0) DF:PF Status:Device Status Data(96):PF Flags 2(28) SBS:Temperature(0x08) SBS:Voltage(0x09) SBS:Current(0x0a) SBS:CellVoltage4..1(0x3c..0x3f) SBS:SafetyStatus(0x51)[PF] SBS:PFStatus(0x53) 2.2.3 Limit based Protection The bq20z70 reports a 2nd level permanent failure and sets the appropriate PFStatus flag if the internal error counter reaches the max error limit. The internal error counter is incremented by one if the error happens and decremented by one each fail recovery period. bq29330 AFE Communication Fault Protection -- The bq20z70 periodically validates its read and write communications with the bq29330. If either a read or write verify fails, an internal AFE_Fail_Counter is incremented. If the AFE_Fail_Counter reaches AFE Fail Limit, the bq20z70 reports a [AFE_C] permanent failure. If the AFE Fail Limit is set to 0, this feature is disabled. An [AFE_C] fault can also be declared if, after a full reset, the initial gain and offset values read from the AFE cannot be verified. These values are A/D readings of the bq29330 VCELL output. The bq29330 offset values are verified by reading the values twice and confirming that the readings are within acceptable limits. The max difference between 2 readings is fixed at 20 . The maximum number of read retries, if offset and gain value verification fails and [AFE_C] fault is declared, is set in AFE Fail Limit. Dataflash Failure -- The bq20z70 can detect if the data flash is not operating correctly. A permanent failure is reported when either: (i) After a full reset the instruction flash checksum does not verify; (ii) if any data flash write does not verify; or (iii) if any data flash erase does not verify. Table 2-7. Error Based 2nd Level Protection Protection Monitored Value Fail Recovery AFE Communication Fault Periodic Communication with bq29330 Data Flash Failure Dataflash Max Error Limit (set to 0 to disable Protection) PFStatus Flag Permanent Fail Cfg Flag Decrement of AFE_Fail_Counter AFE Fail Limit by one per 20s time period [AFE_C] [XAFE_C] - [DFF] [XDFF] false flash checksum after reset, dataflash write not verified, dataflash erase not verified Related Variables: * DF:2nd Level Safety:AFE Verification(20):AFE Fail Limit(1) * DF:Configuration:Registers(64):Permanent Fail Cfg(6) * DF:PF Status:Device Status Data(96):PF Flags 1(0) * DF:PF Status:Device Status Data(96):PF Flags 1(28) * SBS:PFStatus(0x53) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 21 www.ti.com Gas Gauging 2.2.4 Clearing Permanent Failure The bq20z70 permanent failure can be cleared by sending two ManufacturerAccess commands in sequence: the first word of the PFKey followed by the second word of the PFKey. After sending these two commands in sequence, PFStatus flags are cleared. Refer to Permanent Fail Clear (PFKey) Manufacturer access for further details. Related Variables: * SBS:ManufacturerAccess(0x00) * SBS:PFStatus(0x53) 2.3 Gas Gauging The bq20z70 measures individual cell voltages, pack voltage, temperature, and current using features of the bq29330 AFE device. The bq20z70 determines battery state of charge by analyzing individual cell voltages when a time exceeding 35 minutes has passed since the batteries last charge or discharge activity. The bq20z70 measures charge and discharge activity by monitoring the voltage across a small-value series sense resistor (10m typ.) between the cell stack negative terminal and the negative terminal of the battery pack. The battery state of charge is subsequently adjusted during load or charger application using the integrated charge passed through the battery. 2.3.1 Impedance Track Configuration Load Mode -- During normal operation, the battery-impedance profile compensation of the Impedance Track algorithm can provide more accurate full-charge and remaining state-of-charge information if the typical load type is known. The two selectable options are constant current ( Load Mode = 0) and constant power ( Load Mode = 1). Load Select -- In order to compensate for the I x R drop near the end of discharge, the bq20z70 needs to be configured for whatever current (or power) will flow in the future. While it can not be exactly known, the bq20z70 can use load history such as the average current of the present discharge to make a sufficiently accurate prediction. The bq20z70 can be configured to use several methods of this prediction by setting the Load Select value. Because this estimate has only a second-order effect on remaining capacity accuracy, different measurement based methods (0x00 to 0x03) result in only minor differences in accuracy. However, methods 0x04 - 0x06, where an estimate is arbitrarily assigned by the user, can result in significant error if a fixed estimate is far from the actual load. Constant Current ( Load Mode = 0) 22 Constant Power ( Load Mode = 1) 0 = previous average discharge current from last run previous average discharge power from last run 1 = present average discharge current present average discharge power 2 = Current Current x Voltage 3 = AverageCurrent (default) AverageCurrent x average Voltage 4 = Design Capacity / 5 Design Energy / 5 5 = AtRate (mA) AtRate (10 mW) 6 = User Rate-mA User Rate-mW Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Gas Gauging Pulsed Load Compensation and Termination Voltage -- In order to take into account pulsed loads, while calculating remaining capacity until Term Voltage threshold is reached, the bq20z70 monitors not only average load but also short load spikes. The maximum voltage deviation during a load spike is continuously updated during discharge and stored in Delta Voltage. Reserve Battery Capacity -- The bq20z70 allows an amount of capacity to be reserved in either mAh ( Reserve Cap-mAh, Load Mode = 0) or 10 mWh ( Reserve Cap-mWh, Load Mode = 1) units between the point where RemainingCapacity function reports zero capacity, and the absolute minimum pack voltage, Term Voltage. This enables a system to report zero energy, but still have enough reserve energy to perform a controlled shutdown, or to provide an extended sleep period for the host system. Also, if [RESCAP] bit is set to 0, the reserve capacity is compensated at a no-load condition. However, if [RESCAP] bit is set to 1, then the reserve capacity is compensated at the present discharge rate as selected by Load Select. Related Variables: * DF:SBS Configuration:Data(48):Design Capacity(22) * DF:SBS Configuration:Data(48):Design Energy(24) * DF:Configuration:Operation Cfg B(2)[RESCAP] * DF:Gas Gauging:IT Cfg(80):Load Select(0) * DF:Gas Gauging:IT Cfg(80):Load Mode(1) * DF:Gas Gauging:IT Cfg(80):Term Voltage(45) * DF:Gas Gauging:IT Cfg(80):User Rate-mA(60) * DF:Gas Gauging:IT Cfg(80):User Rate-mW(62) * DF:Gas Gauging:IT Cfg(80):Reserve Cap-mAh(64) * DF:Gas Gauging:IT Cfg(80):Reserve Cap-mWh(66) * DF:Gas Gauging:State(82):Delta Voltage(25) * SBS:Voltage(0x09) * SBS:Current(0x0a) * SBS:AverageCurrent(0x0b) * SBS:OperationStatus(0x54)[LDMD] 2.3.2 Gas Gauge Modes Resistance updates take place only in discharge mode, while OCV and Qmax updates only take place in relaxation mode. Entry and exit of each mode is controlled by data flash parameters in the subclass 'Gas Gauging: Current Thresholds' section. In Relaxation Mode or Discharge Mode, the DSG flag in BatteryStatus is set. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 23 Charge Mode 24 Detailed Description Current > Chg Current Threshold Current < Quit Current for 60s period Current > Chg Current Threshold OCV update Qmax update [DSG] Relaxation Mode Current < (-) Dsg Current Threshold Current > (-) Quit Current for 1s period Current < (-) Dsg Current Threshold Discharge Mode Cell Impedance update [DSG] www.ti.com Gas Gauging Figure 2-6. Gas Gauge Operating Modes SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Gas Gauging 1s 60s (-)Dsg Current Threshold (-)Quit Current Quit Current Chg Current Threshold Current [DSG] 1 Relaxation Mode 0 Charge Mode 1 Relaxation Mode 1 Discharge Mode 0 Charge Mode 1 Discharge Mode 1 Relaxation Mode Time Charge mode is exited and Relaxation mode is entered when Current goes below Quit Current for a period of 60s. Discharge mode is entered when Current goes below (-)Dsg Current Threshold. Discharge mode is exited and Relaxation mode is entered when Current goes above (-)Quit Current threshold for a period of 1s. Charge mode is entered when Current goes above Chg Current Threshold. Figure 2-7. Gas Gauge Operating Mode Example SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 25 www.ti.com Gas Gauging Related Variables: * DF:Gas Gauging:Current Thresholds(81):Dsg Current Threshold(0) * DF:Gas Gauging:Current Thresholds(81):Chg Current Threshold(2) * DF:Gas Gauging:Current Thresholds(81):Quit Current(4) * SBS:Current(0x0a) * SBS:BatteryStatus(0x16)[DSG] * SBS:OperationStatus(0x54)[VOK],[R_DIS],[QEN] 2.3.3 Qmax The total battery capacity is found by comparing states of charge before and after applying the load with the amount of charge passed. When an applications load is applied, the impedance of each cell is measured by comparing the open circuit voltage (OCV) obtained from a predefined function for present state of charge with the measured voltage under load. Measurements of OCV and charge integration determine chemical state of charge and Chemical Capacity (Qmax). The bq20z70 acquires and updates the battery-impedance profile during normal battery usage. It uses this profile, along with state-of-charge and the Qmax values, to determine FullChargeCapacity and RelativeStateOfCharge specifically for the present load and temperature. FullChargeCapacity reports a capacity or energy available from a fully charged battery reduced by Reserve Cap-mAh or Reserve Cap-mWh under the present load and present temperature until Voltage reaches the Term Voltage . Related Variables: * DF:Gas Gauging:IT Cfg(80):Term Voltage(45) * SBS:Voltage(0x09) * SBS:RelativeStateOfCharge(0x0d) * SBS:FullChargeCapacity(0x10) 2.3.3.1 Qmax Initial Values The initial Qmax Pack, Qmax Cell 0, Qmax Cell 1, Qmax Cell 2, and Qmax Cell 3 values should be taken from the cell manufacturers' data sheet multiplied by the number of parallel cells, and are also used for the DesignCapacity function value in the Design Capacity dataflash value. See "Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm" application note (SLUA364) for further details. Related Variables: * DF:SBS Configuration:Data(48):Design Capacity(22) * DF:Gas Gauging:State(82):Qmax Cell 0(0) * DF:Gas Gauging:State(82):Qmax Cell 1(2) * DF:Gas Gauging:State(82):Qmax Cell 2(4) * DF:Gas Gauging:State(82):Qmax Cell 3(6) * DF:Gas Gauging:State(82):Qmax Pack(8) * SBS:DesignCapacity(0x18) 2.3.3.2 Qmax Update Conditions The bq20z70 updates the no-load full capacity (Qmax) when two open circuit voltage (OCV) readings are taken. These OCV readings are taken when the battery is in a relaxed state before and after charge or discharge activity. A relaxed state is achieved if the battery voltage has a dV/dt of < 4 V/s. Typically it takes 2 hrs in a charged state and 5 hrs in a discharged state to ensure that the dV/dt condition is satisfied. If 5 hrs is exceeded, a reading will be taken even if the dV/dt condition was not satisfied. A Qmax update is disqualified under the following conditions: * Temperature: If Temperature is outside of the range 10C to 40C. 26 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Charge Control * * Delta Capacity: If the capacity change between suitable battery rest periods is less than 37%. Voltage: If CellVoltage4..1is within the range of 3737mV and 3800mV for the default LIONchemistry. Refer to "Support of Multiple Li-Ion Chemistries w/Impedance Track(TM) Gas Gauges", application note, (SLUA372) for the voltage ranges of other chemistries. Related Variables: * DF:SBS Configuration:Data(48):Device Chemistry(46) * SBS:Temperature(0x08) * SBS:RelativeStateOfCharge(0x0d) * SBS:AbsoluteStateOfCharge(0x0e) * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:OperationStatus(0x54)[VOK],[QEN] 2.4 Charge Control The bq20z70 can report the appropriate charging current needed for the constant charging current and the charging voltage needed for constant voltage charging per charging algorithm to a smart charger using the ChargingCurrent and the ChargingVoltage functions. The actual charging status of bq20z70 is indicated with flags and can be read out with the ChargingStatus function. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 27 * * * 28 Detailed Description [OC], [OCA], ChargingVoltage = 0 If [OC], then CHG FET and ZVCHG FET (if used) are turned off OverCharge ChargingCurrent = 0, [TCA] Charging Fault [CHGSUSP] ChargingCurrent = 0 If [CHGSUSP], then CHG FET and ZVCHG FET (if used) are turned off Charge Suspend Charge Inhibit [XCHG] ChargingCurrent = 0, ChargingVoltage = 0 If [CHGIN], then CHG FET and ZVCHG FET (if used) are turned off [DSG] [NR] AND AverageCurrent 0 AND continuous discharge of 2mAh RemainingCapacity - FullChargeCapacity Over Charge Capacity Temperature Charge Inhibit Temp Low + 5C AND Temperature Charge Inhibit Temp High - 5C [FCHG] CHG FET on Normal [FC], [TCA], [MCHG] and ChargingCurrent = 0 If [CHGFET], then CHG FET turned off If [CSYNC], then RemainingCapacity = FullChargeCapacity. If [RSOCL], then RSOC held at 99% till charge termination Prim. Charge Termination Fast Charge ChargingCurrent = Fast Charge Current Normal ChargingCurrent All CellVoltage4..1 Pre-Chg Voltage AND Temperature > Pre-chg Temp + 5C [PCHG], ChargingCurrent = Pre-chg Current If [ZVCHG1], [ZVCHG0] = 0,0: 0-V Charge FET Mode; Pre-Chg FET on ZVCHG and PMS = GND 0,1: Common FET Mode; CHG FET and PMS = Pack+ 1,0: Pre-Chg FET Mode; Pre-Chg FET on OD and PMS = GND 1,1: No Action Pre-Charge (Average Charge Current < Taper Current AND Accumulated Charge > 0.25mAh per 40s AND Voltage > Charging Voltage - Taper Voltage) for 2 x 40s Fault Condition OR [NR] = 0 and Battery Removal OR Mode change [DSG] Any Cell Voltage < Precharge Voltage OR (Temperature Pre-chg Temp AND Temperature > Chg Inhibit Temp Low) Charge Mode Current Chg Current Threshold Discharge Or Relaxation Mode Fault Condition OR [NR] = 0 and Battery Removal OR Continuous Discharge > Over Charge Recovery OR Current (-)Dsg Current Threshold Temperature > Suspend High Temp OR Temperature < Suspend Low Temp Temperature Charge Inhibit Temp High - 5C AND Temperature Charge Inhibit Temp Low + 5C Temperature > Charge Inhibit Temp High OR Temperature < Charge Inhibit Temp Low www.ti.com Charge Control Figure 2-8. Charging SBS:ChargingCurrent(0x14) SBS:ChargingVoltage(0x15) SBS:ChargingStatus(0x55) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Charge Control 2.4.1 Charge Control SMBus Broadcasts All broadcasts to a host or a smart charger are enabled by the [BCAST] bit. The [ChgM] and [AM] modes in BatteryMode are enabled by setting the [BCAST] bit. If the [HPE] bit is enabled, transmissions to the host and receiving communications from all sources are PEC enabled. If the [CPE] flag is enabled, Master-Mode broadcasts to the Smart-Charger address are PEC enabled. When broadcast is enabled, the following broadcasts are sent: * ChargingVoltage and ChargingCurrent broadcasts are sent to the Smart-Charger device address (0x12) every 10 to 60 seconds. * If any of the [OCA], [TCA], [OTA], [TDA], [RCA], [RTA] flags are set, the AlarmWarning broadcast is sent to the host device address (0x14) every 10 seconds. Broadcasts stop when all flags above have been cleared. * If any of the [OCA], [TCA], [OTA] or [TDA] flags are set, the AlarmWarning broadcast is sent to Smart-Charger device address every 10 seconds. Broadcasts stop when all flags above have been cleared. Related Variables: * DF:Configuration:Registers(64):Operation Cfg B(2)[CPE],[HPE],[BCAST] * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[OCA],[TCA],[OTA],[TDA],[RCA],[RTA] * SBS:BatteryMode(0x03)[ChgM],[AM] 2.4.2 Cell Balancing The bq20z70 can determine the chemical state of charge of each cell using the Impedance TrackTM algorithm. The cell balancing algorithm used in the bq20z70 decreases the differences in imbalanced cells in a fully charged state gradually, which prevents fully charged cells from becoming overcharged causing excessive degradation. This increases overall pack energy by preventing premature charge termination. More Information can be found in the "Cell Balancing Using the bq20z80" Application Report (SLUA340). The algorithm determines the amount of charge needed to fully charge each cell. There is a bypass FET in parallel with each cell connected to the bq29330. The FET is enabled for each cell with charge greater than the lowest charged cell to reduce charge current through those cells. Each FET is enabled for a precalculated time as calculated by the cell balancing algorithm. When any bypass FET is turned on, then the [CB] charging status flag is set, otherwise the [CB] flag is cleared. If Min Cell Deviation is set to 0 cell balancing is disabled and all bypass FETs stay OFF. The bypass time needed for each cell is calculated as: Min Cell Deviation = R / (duty_cycle * V_avg) * 3.6 s/mAh Where: R = internal bypass FET resistance of 500 (typ.) of bq29330 + 2 series input filter resistors, R. For example: if input filter R value is 100 , R = 500 + 2 x R = 700 . V_avg = 3.6V duty_cycle = 0.4 typ. Using default values, the formula calculates the default value for Min Cell Deviation: Min Cell Deviation = (500 + (2 x R) ) / (0.4 * 3.6V) * 3.6 s/mAh = 1750 s/mAh, Related Variables: * DF:Charge Control:Cell Balancing Cfg(37):Min Cell Deviation(0) * SBS:ChargingStatus(0x55)[CB] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 29 www.ti.com Charge Control 2.4.3 Charge Inhibit Mode If the bq20z70 is in discharge mode or relaxation mode ([DSG] = 1), the bq20z70 goes into charge inhibit mode and sets the ChargingCurrent and ChargingVoltage values to 0 to inhibit charging if: * Temperature < Charge Inhibit Temp Low limit OR * Temperature > Charge Inhibit Temp High limit In charge inhibit mode the [XCHG] flag in ChargingStatus is set. If [CHGIN] bit in Operation Cfg B is set, the CHG FET and ZVCHG FET (if used) are also turned off when the bq20z70 is in charge-inhibit mode. The bq20z70 allows charging to resume when: * Temperature Charge Inhibit Temp Low + 5C AND * Temperature Charge Inhibit Temp High - 5C The FETs also return to their previous states at that time. The [XCHG] flag is cleared when the above conditions are met, when a fault condition is detected, or when the battery is removed if in removable mode ([NR] = 0). 30 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback ChargingCurrent= 0 ChargingVoltage= 0 [XCHG] If [CHGIN] bit set, CHG FET+ ZVCHG FET are turned off. Charge Inhibit Low Temperature < Charge Inhibit Temp Low Temperature Charge Inhibit Temp Low + 5C Charging Allowed Temperature Charge Inhibit Temp High - 5C Temperature > Charge Inhibit Temp High Charge Inhibit High ChargingCurrent= 0 ChargingVoltage= 0 [XCHG] If [CHGIN] bit set, CHG FET+ ZVCHG FET are turned off. www.ti.com Charge Control Figure 2-9. Charge Inhibit Detailed Description 31 www.ti.com Charge Control Related Variables: * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp Low(0) * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp High(2) * DF:Configuration:Registers(64):Operation Cfg B(2)[CHGIN],[NR] * SBS:Temperature(0x08) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[DSG] * SBS:ChargingStatus(0x55)[XCHG] 2.4.4 Charge Suspend Mode The bq20z70 suspends charging when: * one of the following conditions - Temperature < Suspend Low Temp, OR - Temperature > Suspend High Temp In charge suspend mode [CHGSUSP] flag in ChargingStatus is set, and ChargingCurrent is set to 0. The CHG FET and ZVCHG FET(if used) are also turned off if [CHGSUSP] bit in Operation Cfg B register is set. The bq20z70 resumes charging if: * Temperature Charge Inhibit Temp Low + 5C, AND * Temperature Charge Inhibit Temp High - 5C. Upon resuming, the bq20z70 clears the [CHGSUSP] status flag, sets ChargingCurrent according to the appropriate charging mode entered and the CHG and ZVCHG FETs (if used) return to their previous state. The bq20z70 also leaves charge suspend mode and clears the [CHGSUSP] flag when a protection condition is detected or when the battery is removed in removable battery mode ([NR] = 0) 32 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback ChargingCurrent= 0 [CHGSUSP] If [CHGSUSP] bit in Operation Cfg B is set, CHG FET + ZVCHG FET are turned off. Charge Suspend Low Temperature < Suspend Low Temp Temperature Charge Inhibit Temp Low + 5C Charging Temperature Charge Inhibit Temp High - 5C Temperature > Suspend High Temp Charge Suspend High ChargingCurrent= 0 [CHGSUSP] If [CHGSUSP] bit in Operation Cfg B is set, CHG FET + ZVCHG FET are turned off. www.ti.com Charge Control Figure 2-10. Charge Suspend Related Variables: * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp Low(0) * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp High(2) Detailed Description 33 www.ti.com Charge Control * * * * * * * * * DF:Charge Control:Fast Charge Cfg(34):Suspend Low Temp(6) DF:Charge Control:Fast Charge Cfg(34):Suspend High Temp(8) DF:Configuration:Registers(64):Operation Cfg B(2)[CHGSUSP],[NR] DF:Gas Gauging:Current Thresholds(81):Chg Current Threshold(2) SBS:Temperature(0x08 SBS:AverageCurrent(0x0b) SBS:ChargingCurrent(0x14) SBS:BatteryStatus(0x16)[DSG] SBS:ChargingStatus(0x55)[CHGSUSP] 2.4.5 Precharge The bq20z70 enters precharge mode during charging if the Temperature function reports a temperature between Charge Inhibit Temp Low limit and Pre-chg Temp limit or any cell voltages are below Pre-chg Voltage limit. Precharge mode is also entered if any of the SafetyStatus flags [CUV] or [OCD] are set. Depending on the setting of the [ZVCHG1] and [ZVCHG0] bits, different FETs can be used in pre-charge mode. 34 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Charge Control Table 2-8. Precharge FET ZVCHG1 ZVCHG0 FET used 0 0 ZVCHG FET 0 1 CHG FET 1 0 GPOD Pin on bq29330 1 1 No Action In precharge mode the [PCHG] flag is set and ChargingCurrent is set to Pre-chg Current. The bq20z70 leaves Pre-charge mode and clears the [PCHG] flag if all cell voltages reach or rise above Recovery Voltage and the reported Temperature is equal to or greater than Pre-chg Temp + 5C. Pre-charge mode is also exited if charge inhibit mode is entered, any fault condition is detected, or the pack is removed in removable mode. Related Variables: * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp Low(0) * DF:Charge Control:Pre-Charge Cfg(33):Pre-chg Current(0) * DF:Charge Control:Pre-Charge Cfg(33):Pre-chg Temp(2) * DF:Charge Control:Pre-Charge Cfg(33):Pre-chg Voltage(4) * DF:Charge Control:Pre-Charge Cfg(33):Recovery Voltage(6) * DF:Configuration:Registers(64):Operation Cfg A(0)[ZVCHG1],[ZVCHG0] * SBS:Temperature(0x08) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:CellVoltage4..1(0x3c..0x3f) * SBS:SafetyStatus(0x51)[CUV],[OCD],[OCD2] * SBS:ChargingStatus(0x55)[PCHG] 2.4.6 Fast Charge The bq20z70 enters fast charge mode and sets ChargingCurrent to Fast Charge Current and ChargingVoltage to Charging Voltage when all of the following conditions are met. * Temperature Pre-chg Temp * Temperature Charge Suspend Temp High * CellVoltage4..1 Pre-chg Voltage During fast charge, [FCHG] ChargingStatus flag is set and the CHG FET is turned on if no protection conditions are detected. Related Variables: * DF:Charge Control:Pre-Charge Cfg(33):Pre-chg Temp(2) * DF:Charge Control:Pre-Charge Cfg(33):Pre-chg Voltage(4) * DF:Charge Control:Fast Charge Cfg(34):Fast Charge Current(0) * DF:Charge Control:Fast Charge Cfg(34):Charging Voltage(2) * DF:Charge Control:Fast Charge Cfg(34):Suspend Temp High(10) * SBS:Temperature(0x08) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:CellVoltage4..1(0x3c..0x3f) * SBS:ChargingStatus(0x55)[FCHG] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 35 www.ti.com Charge Control 2.4.7 Primary Charge Termination The bq20z70 determines charge termination if: * Average Charge Current < Taper Current during 2 consecutive 40s time periods, AND * the accumulated change in capacity must be > 0.25mAh per period during 2 consecutive 40s time periods, AND * Voltage + Taper Voltage Charging Voltage Upon entering charge termination status, [TCA] and [FC] flags are set, [MCHG] is flag set, ChargingCurrent = 0. The following parameters change the behavior of bq20z70 on charge termination: Table 2-9. Primary Charge Termination Parameter Behavior on Primary Charge Termination [CHGFET] set CHG FET turned off [CSYNC] set RemainingCapacity = FullChargeCapacity [RSOCL] set RelativeStateOfCharge is held at 99% until primary charge termination occurs and displays 100% only upon entering primary charge termination state. [RSOCL] cleared RelativeStateOfCharge is not held at 99% until primary charge termination occurs. Fractions of % greater than 99% are rounded up to display 100%. Related Variables: * DF:Charge Control:Fast Charge Cfg(34):Charging Voltage(2) * DF:Charge Control:Termination (36):Taper Current(2) * DF:Charge Control:Termination (36):Taper Voltage(6) * DF:Configuration:Registers(64):Operation Cfg B(2)[CHGFET],[CSYNC] * DF:Configuration:Registers(64):Operation Cfg C(4)[RSOCL] * SBS:Voltage(0x09) * SBS:Current(0x0a) * SBS:RemainingCapacity(0x0f) * SBS:FullChargeCapacity(0x10) * SBS:ChargingCurrent(0x14) * SBS:BatteryStatus(0x16)[TCA],[FC] * SBS:ChargingStatus(0x55)[MCHG] 2.4.8 Charging Faults The bq20z70 can report charging faults in the ChargingStatus register. Overcharge The bq20z70 goes into overcharge mode if battery pack is charged in excess of FullChargeCapacity by an amount greater than Over Charge Capacity. Also, ChargingCurrent = 0, ChargingVoltage = 0, [TCA] and [OCA] flags in BatteryStatus and [OC] flag in ChargingStatus are set. If Over Charge Capacity is set to 0, this feature is completely disabled. The bq20z70 recovers if any of the following conditions are met: * Pack removed and reinserted ([NR] = 0) * Continuous amount of discharge over 2mAh and AverageCurrent < 0, when [NR] = 1 * RemainingCapacity FC Clear % On recovery, [TCA] and [OCA] flags in BatteryStatus and [OC] flag in ChargingStatus are cleared. 36 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Charge Control Table 2-10. Charging Faults Charge Fault Fault Condition Recovery Condition ChargingStatus Flag Overcharge Charge in excess of FullChargeCapacity Over Charge Capacity Pack removed and reinserted if [NR] = 0, OR continuous amount of discharge of 2mAh if [NR] = 1, OR RemainingCapacity FC Clear % [OC] Related Variables: * DF:Charge Control:Fast Charge Cfg(34):Charging Voltage(2) * DF:Charge Control:Termination Cfg(36):FC Clear %(12) * DF:Charge Control:Charging Faults(38):Over Charge Capacity(13) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:Voltage(0x09) * SBS:Current(0x0a) * SBS:AverageCurrent(0x0b) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[TCA],[OCA] * SBS:ChargingStatus(0x55)[FCHG] 2.4.9 Discharge and Charge Alarms The bq20z70 enables [TDA], [FD], [TCA] and [FC] flags in BatteryStatus to be set or cleared on the following thresholds based on RelativeStateOfCharge. All thresholds can be disabled by setting them to -1. FC Clear % should not be disabled by setting to -1. RelativeStateOfCharge Threshold BatteryStatus Flag TDA Set % [TDA] is set TDA Clear % [TDA] is cleared FD Set % [FD] is set FD Clear % [FD] is cleared TCA Clear % [TCA] is cleared FC Clear % [FC] is cleared The [TDA] flag in BatteryStatus can also be set or cleared based on Voltage. If the voltage settings are not used then they should be set to extreme range values. Threshold Voltage BatteryStatus Flag TDA Volt Threshold for a period of TDA Volt Time [TDA] is set TDA Clear Volt [TDA] is cleared Related Variables: * DF:Charge Control:Termination Cfg.(36):TCA Clear %(10) * DF:Charge Control:Termination Cfg.(36):FC Clear%(12) * DF:SBS Configuration:Configuration(49):TDA Set %(0) * DF:SBS Configuration:Configuration(49):TDA Clear %(1) * DF:SBS Configuration:Configuration(49):FD Set %(2) * DF:SBS Configuration:Configuration(49):FD Clear %(3) * DF:SBS Configuration:Configuration(49):TDA Set Volt Threshold(4) * DF:SBS Configuration:Configuration(49):TDA Set Volt Time(6) * DF:SBS Configuration:Configuration(49):TDA Clear Volt(7) * SBS:Voltage(0x09) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 37 www.ti.com Charge Control * 38 SBS:RelativeStateOfCharge(0x0d) Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Device Operating Mode 2.5 Device Operating Mode The bq20z70 has several device power modes. During these modes, the bq20z70 modifies its operation to minimize power consumption from the battery. 2.5.1 Normal Mode During normal operation, the bq20z70 takes Current, Voltage, and Temperature measurements, performs calculations, updates SBS data, and makes protection and status decisions at one-second intervals. Between these periods of activity, the bq20z70 is in a reduced power state. PRES is sampled once per second and if PRES is high, OperationStatus [PRES] flag is cleared. If PRES is low, OperationStatus [PRES] is set indicating the system is present (the battery is inserted). If [NR] bit is set, the PRES input can be left floating as it is not monitored. Related Variables: * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:OperationStatus(0x54)[PRES] 2.5.2 Battery Pack Removed Mode/System Present Detection 2.5.2.1 Battery Pack Removed The bq20z70 detects the Battery Pack Removed state if [NR] bit is set to 0 AND the PRES input is high ([PRES] = 0). On entry to the Battery Pack Removed state, [TCA] and [TDA] flags are set, ChargingCurrent and ChargingVoltage are set to 0, the CHG and DSG FETs are turned off, and the ZVCHG FET is turned off (if used). Polling of the PRES pin continues at a rate of once every 1 s. The bq20z70 exits the Battery Pack Removed state if [NR] flag is set to 0, AND the PRES input is low ( [PRES] = 1). When this occurs, [TCA] and [TDA] flags are reset. Related Variables: * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:BatteryStatus(0x16)[TCA],[TDA] * SBS:OperationStatus(0x54)[PRES] 2.5.2.2 System Present PRES is sampled once per second and if PRES is high, OperationStatus [PRES] flag is cleared. If PRES is low, OperationStatus [PRES] is set indicating the system is present (the battery is inserted). If [NR] bit is set, the PRES input is ignored and can be left floating. Related Variables: * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:OperationStatus(0x54)[PRES] 2.5.3 Sleep Mode In Sleep mode, the bq20z70 measures Voltage and Temperature every 5s intervals and Current every 20s. At each interval, the bq20z70 performs calculations, updates SBS data and makes protection and status decisions. Between these periods of activity, the bq20z70 is in a reduced-power state. The bq20z70 enters Sleep mode when the following conditions exist: * If [NR] bit is set to 0, the PRES input must also be high, [PRES] = 0, for the bq20z70 to enter sleep. AND one of the following conditions: * (|Current| 10mA) AND (SMBus is low for 5s) AND ([SLEEP] bit is set) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 39 www.ti.com Device Operating Mode * OR (|Current| 10mA) AND (ManufacturerAccess Sleep command is received) AND ([SLEEP] is set). Entry to Sleep mode is blocked if any of the PF Status flags are set. On entry to sleep, if [NR] = 0, the CHG and DSG FETs are turned off, and the ZVCHG FET is turned off (if used) regardless of [NRCHG] setting. If [NR] = 1, the CHG FET is turned off, and the ZVCHG FET is turned off (if used). However, if [NRCHG] is set then the CHG FET remains on. Also, on entry to Sleep mode, the auto calibration of the A/DC begins. However, if Temperature is 5C or Temperature 45C, Auto Calibration is not started on entry to sleep mode. The activation of auto calibration is not affected by the state of [SLEEP], nor Current. The bq20z70 exits Sleep mode when one or more of the following conditions exist: * If [NR] bit is set to 0, the PRES is pulled low, [PRES] = 1 * (|Current| > 10mA) * SMBC or SMBD inputs transition high * OperationStatus, ChargingStatus or SafetyStatus flags are set * Wake function enabled by setting Wake Current Reg and a voltage across SRP and SRN Related Variables: * DF:Power:Power(68):Wake Current Reg(16) * DF:Configuration:Registers(64):Operation Cfg A(0)[SLEEP] * DF:Configuration:Registers(64):Operation Cfg B(2)[NR], [NRCHG] * SBS:ManufacturerAccess(0x00)Sleep(0x0011) * SBS:Current(0x0a) * SBS:SafetyStatus(0x51) * SBS:OperationStatus(0x54)[PRES] 2.5.4 Wake Function The bq20z70 can exit sleep mode, if enabled, by the presence of a voltage across SRP and SRN. The level of current signal needed is defined in Wake Current Reg. Low Byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 RSVD RSVD RSVD RSVD RSVD IWAKE RSNS1 RSNS0 LEGEND: RSVD = Reserved and must be programmed to 0 Figure 2-11. Wake Current Reg IWAKE --This bit sets the current threshold for the Wake function. 0 = 0.5A (or if RSNS0=RSNS1=0 then this function is disabled) 1 = 1.0A (or if RSNS0=RSNS1=0 then this function is disabled) Table 2-11. Wake Current Reg RSNS1 RSNS0 Resistance 0 0 Disabled (Default) 0 1 2.5 m 1 0 5 m 1 1 10 m Related Variables: * DF:Power:Power(68):Wake Current Reg(16) * DF:Configuration:Registers(64):Operation Cfg A(0)[SLEEP] * SBS:Current(0x0a) 40 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Security (Enables and Disables Features) 2.5.5 Shutdown Mode The bq20z70 enters Shutdown mode if the following conditions are met: * Voltage Shutdown Voltage AND Current 0 for a period greater than 10s OR * (ManufacturerAccess shutdown command received AND Current = 0) AND voltage at the bq29330 PACK pin < Charger Present threshold. When the bq20z70 meets these conditions, the CHG, DSG, and ZVCHG FETs are turned off, and the bq29330 is commanded to shut down. In Shutdown mode, the bq20z70 is completely powered down because its supply is removed. To exit Shutdown mode, the voltage at the PACK pin of the bq29330 must be greater than its minimum operating voltage. When this occurs, the bq29330 returns power to the bq20z70, the [WAKE] flag is set, and the bq29330 configured. The [INIT] and [WAKE] flags are cleared after approximately 1 s when all SBS parameters have been measured and updated. Related Variables: * DF:Power:Power(68):Shutdown Voltage(2) * DF:Power:Power(68):Charger Present(5) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:Voltage(0x09) * SBS:Current(0x0a) * SBS:BatteryStatus(0x16)[INIT] * SBS:OperationStatus(0x54)[PRES],[WAKE] 2.6 Security (Enables and Disables Features) There are three levels of secured operation within the bq20z70. To switch between the levels, different operations are needed with different codes. The three levels are Sealed, Unsealed, and Full Access. 1. Full Access or Unsealed to Sealed -- The use of the Seal Device command instructs the bq20z70 to limit access to the SBS functions and data flash space and sets the [SS] flag. In sealed mode, standard SBS functions have access per the Smart Battery Data Specification - Appendix A. Extended SBS Functions and data flash are not accessible. Once in sealed mode, the part can never permanently return to Unsealed or Full Access modes. 2. Sealed to Unsealed -- Instructs the bq20z70 to extend access to the SBS and data flash space and clears the [SS] flag. In unsealed mode, all data, SBS, and DF have read/write access. Unsealing is a 2 step command performed by writing the 1st word of the UnSealKey to ManufacturerAccess followed by the second word of the UnSealKey to ManufacturerAccess. The unseal key can be read and changed via the extended SBS block command UnSealKey when in Full Access Mode. To return to the Sealed mode, either a hardware reset is needed, or the ManufacturerAccess seal device command is needed to transit from Full Access or Unsealed to Sealed. 3. Unsealed to Full Access -- Instructs the bq20z70 to allow Full Access to all SBS commands and data flash. The bq20z70 is shipped from TI in this mode. The keys for Unsealed to Full Access can be read and changed via the extended SBS block command FullAccessKey when in Full Access mode. Changing from Unsealed to Full Access is performed by using the ManufacturerAccess command, by writing the 1st word of the FullAccessKey to ManufacturerAccess followed by the second word of the FullAccessKey to ManufacturerAccess. The full access key can be read and changed via the extended SBS block command FullAccessKey when in Full Access Mode. In Full Access mode, the command to go to Boot ROM can be sent. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 41 42 Detailed Description No DataFlash Access Standard SBS Commands Sealed Mode SealDevice Command Write lower part of UnsealKey + higher part of UnsealKey to ManufacturerAccess SealDevice Command DataFlash Read/Write Access Standard SBS Commands Some Extended SBS Commands Unsealed Mode Write lower part of FullAccessKey + higher part of FullAccessKey to ManufacturerAccess Full Hardware Reset OR writing 0x08 to SMBus DataFlash Read/Write Access Standard SBS Commands All Extended SBS Commands Full Access Mode Write 0x0f00 to ManufacturerAcces Device can be reprogrammed BootROM www.ti.com Security (Enables and Disables Features) Figure 2-12. Security Related Variables: * SBS:ManufacturerAccess(0x00):Seal Device(0x0020) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Calibration * * * 2.7 SBS:OperationStatus(0x54)[SS],[FAS] SBS:UnSealKey(0x60) SBS:FullAccessKey(0x61) Calibration 2.7.1 Coulomb Counter Dead Band The bq20z70 does not accumulate charge or discharge for gas gauging when the current input is below the dead-band current threshold. The threshold is programmed in CC Deadband (Coulomb Counter Deadband) and should be set sufficiently high to prevent false signal detection with no charge or discharge flowing through the sense resistor. Related Variables: * DF:Calibration:Current(107):CC Deadband(1) 2.7.2 Auto Calibration The bq20z70 provides an auto-calibration feature to cancel the voltage offset error across SRP and SRN for maximum charge measurement accuracy. The bq20z70 performs auto-calibration when the SMBus lines stay low continuously for a minimum of 5 s and Temperature is within bounds of 5C and 45C. Related Variables: * SBS:Temperature(0x08) 2.8 Communications The bq20z70 uses SMBus v1.1 with Master Mode and packet error checking (PEC) options per the SBS specification. 2.8.1 SMBus On and Off State The bq20z70 detects an SMBus off state when SMBC and SMBD are logic-low for 2 seconds. Clearing this state requires either SMBC or SMBD to transition high. Within 1 ms, the communication bus is available. 2.8.2 Packet Error Checking The bq20z70 can receive or transmit data with or without PEC. In the write-word protocol, if the host does not support PEC, the last byte of data is followed by a stop condition. If host does not support PEC, the [HPE] bit should be set to 0 (default). In the write-word protocol, the bq20z70 receives the PEC after the last byte of data from the host. After receipt of the PEC, the bq20z70 compares the value to its calculation. If the PEC is correct, the bq20z70 responds with an ACKNOWLEDGE. If it is not correct, the bq20z70 responds with a NOT ACKNOWLEDGE and sets an error code. If host supports PEC, the [HPE] bit should be set to 1. In the read-word and block-read in master mode, the host generates an ACKNOWLEDGE after the last byte of data sent by the bq20z70. The bq20z70 then sends the PEC, and the host, acting as a master-receiver, generates a NOT ACKNOWLEDGE and a stop condition. Related Variables: * DF:Configuration:Registers(64):Operation Cfg B(2)[HPE] 2.8.3 bq20z70 Slave Address The bq20z70 uses the address 0x16 on SMB for communication. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Detailed Description 43 www.ti.com Communications 2.8.4 Broadcasts to Smart Charger and Smart Battery Host The bq20z70 can broadcast messages to the smart battery charger and smart battery host. This can be enabled with the [BCAST] bit. PEC byte for alarm transmissions in master-mode to charger can be enabled with the [CPE] bit. PEC byte for alarm transmissions in master-mode to smart battery host and PEC byte for receiving communications from all sources in slave-mode can be enabled with the [HPE] bit. Related Variables: * DF:Configuration:Registers(64):Operation Cfg B(2)[CPE],[HPE],[BCAST] 44 Detailed Description SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Appendix A SLUU250A - June 2006 - Revised June 2006 Standard SBS Commands The bq20z70 SBS command set meets the SBD v1.1 specification. All SBS Values are updated in second intervals. A.1 ManufacturerAccess(0x00) This read- or write-word function provides battery-system level data, access to test controls, and security features. Table A-1. ManufactuerAccess SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x00 R/W ManufacturerAccess hex 2 0x0000 0xffff - A.1.1 System Data The result of these commands need to be read from ManufacturerAccess after a write with the command word to ManufacturerAccess. A.1.1.1 Device Type(0x0001) Returns the IC part number. Table A-2. Device Type Manufacturer Access Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x0001 R Device Type hex 2 - - 0x0700 A.1.1.2 Firmware Version(0x0002) Returns the firmware version. The format is most-significant byte (MSB) = Decimal integer, and the least-significant byte (LSB) = sub-decimal integer, e.g., 0x0120 = version 01.20. Table A-3. Firmware Version Manufacturer Access Mode Name Format Size in Bytes Min Value Max Value Default Value 0x0002 R hex 2 - - 0x0101 Firmware Version Unit A.1.1.3 Hardware Version(0x0003) Returns the hardware version stored in single byte of reserved data flash. E.G.: 0xa2 = Version A2. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 45 www.ti.com ManufacturerAccess(0x00) Table A-4. Hardware Version Manufacturer Access Mode Name 0x0003 R Format Hardware Version hex Size in Bytes Min Value Max Value Default Value Unit 2 - - - A.1.1.4 DF Checksum(0x0004) This function is only available when the bq20z70 is in unsealed mode or full access mode, indicated by the [SS] and [FAS] flag. A write to this command forces the bq20z70 to generate a checksum of the full Data Flash (DF) array and. The generated checksum is then returned within 45 ms. Note: If another SMBus command is received while the checksum is being generated, the DF Checksum is generated but the response may be time out (<25ms). Table A-5. DF Checksum Manufacturer Access Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x0004 R DF Checksum hex 2 - - - A.1.1.5 Manufacturer Status(0x0006) This function is available while the bq20z70 is in normal operation. This 16-bit word reports the battery status. High Byte Low Byte bit 7 bit 6 FET1 0 FET0 0 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 PF1 0 PF0 0 STATE3 1 STATE2 0 STATE1 1 STATE0 0 LEGEND: All bits are read-only Figure A-1. Manufacturer Status FET1, FET0 -- Indicates the state of the charge and discharge FETs 0,0 = Both charge and discharge FETs are on. 0,1 = CHG FET is off, DSG FET is on. 1,0 = Both charge and discharge FETs are off. 1,1 = CHG FET is on, DSG FET is off. PF1, PF0 -- Indicates permanent failure cause when permanent failure indicated by STATE3..STATE0 0,0 = Fuse is blown if enabled via DF:Configuration:Registers(64):Permanent Fail Cfg(6) 0,1 = Cell imbalance failure 1,0 = Safety voltage failure 1,1 = FET failure 46 Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com ManufacturerAccess(0x00) STATE3, STATE2, STATE1, STATE0 -- Indicates the battery state. 0,0,0,0 = Wake Up 0,0,0,1 = Normal Discharge 0,0,1,1 = Pre-Charge 0,1,0,1 = Charge 0,1,1,1 = Charge Termination 1,0,0,1 = Permanent Failure 1,0,1,0 = Overcurrent 1,0,1,1 = Overtemperature 1,1,0,0 = Battery Failure 1,1,0,1 = Sleep 1,1,1,0 = Reserved 1,1,1,1 = Battery Pack Removed A.1.1.6 Chemistry ID(0x0008) Returns the OCV table chemistry ID of the battery. The default table ID is 0x0100. For a list of OCV chemistry IDs, refer to "Support of Multiple Li-Ion Chemistries w/Impedance Track(TM) Gas Gauges", application note, (SLUA372). Table A-6. Chemistry ID Manufacturer Access Mode Name Format Size in Bytes Min Value Max Value 0x0008 R Chemistry ID hex 2 0x0000 0xffff Default Value Unit 0x100 A.1.2 System Control The commands in this section cause the bq20z70 to take actions when written. No data is returned. A.1.2.1 Shutdown(0x0010) Instructs the bq20z70 to verify and enter shutdown mode. This command is only available when the bq20z70 is in Unsealed or Full Access mode. Shutdown will not be entered unless PackVoltage < Charger Present and Current = 0. Related Variables: * DF:Power:Power(68):Charger Present(5) * SBS:Current(0x0a) * SBS:PackVoltage(0x5a) * SBS:OperationStatus(0x54)[SS],[FAS] A.1.2.2 Sleep(0x0011) Instructs the bq20z70 to verify and enter sleep mode , if no other command is sent after Sleep command. Any SMB transition will wake up bq20z70. It takes about 1 min before the device will go to sleep. This command is only available when the bq20z70 is in Unsealed or Full Access mode. Related Variables: * DF:Configuration:Registers(64):Operation Cfg A(0)[SLEEP] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 47 www.ti.com ManufacturerAccess(0x00) * SBS:OperationStatus(0x54)[SS],[FAS] A.1.2.3 Seal Device(0x0020) Instructs the bq20z70 to limit access to the extended SBS functions and data flash space, set [SS] flag and clears [FAS] flag. This command is only available when the bq20z70 is in Unsealed or Full Access mode. See "Security" chapter in this document for detailed information. Related Variables: * SBS:OperationStatus(0x54)[SS],[FAS] A.1.2.4 IT Enable(0x0021) This command forces the bq20z70 to begin the Impedance TrackTM algorithm and changes Update Status, and the [QEN] flag. This command is only available when the bq20z70 is in Unsealed or Full Access mode. Related Variables: * DF:Gas Gauging:State(82):Update Status(12) * SBS:OperationStatus(0x54)[VOK],[QEN],[SS],[FAS] A.1.2.5 SAFE activation(0x0030) This command drives the SAFE pin high. This command is only available when the bq20z70 is in Unsealed or Full Access mode. Related Variables: * SBS:OperationStatus(0x54)[SS],[FAS] A.1.2.6 SAFE Clear(0x0031) This command sets the SAFE pin back to low. This command is only available when the bq20z70 is in Unsealed or Full Access mode. Related Variables: * SBS:OperationStatus(0x54)[SS],[FAS] A.1.2.7 Calibration Mode(0x0040) Places the bq20z70 into calibration mode. See "Data Flash Programming and Calibrating the bq20z70 and bq20z90 family of Gas Gauges" application note (SLUA379) for further details. This command is only available when the bq20z70 is in Unsealed or Full Access mode. Related Variables: * SBS:OperationStatus(0x54)[SS],[FAS] A.1.2.8 Reset(0x0041) The bq20z70 undergoes a full reset. The bq20z70 holds the clock line down for a few milli-seconds to complete the reset. This command is only available when the bq20z70 is in Unsealed or Full Access mode. Related Variables: * SBS:OperationStatus(0x54)[SS],[FAS] 48 Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com ManufacturerAccess(0x00) A.1.2.9 BootRom(0x0f00) The bq20z70 goes into BootRom Mode. This command is only available when the bq20z70 is in Full Access mode. Related Variables: * SBS:OperationStatus(0x54)[FAS] A.1.2.10 Permanent Fail Clear(PFkey) This 2 step command needs to be written to ManufacturerAccess in following order: 1st word of the PFKey followed by the 2nd word of the PFKey. The default 1st word is 0x2673 and the default 2nd word is 0x1712. It instructs the bq20z70 to clear the PFStatus, clear the [PF] flag, reset the SAFE pin and unlock the data flash for writes. This command is only available when the bq20z70 is in Unsealed or Full Access mode. Related Variables: * DF:PF Status:Device Status Data(96):PF Flags 1(0) * DF:PF Status:Device Status Data(96):PF Flags 2(28) * SBS:PFStatus(0x46) * SBS:SafetyStatus(0x51)[PF] * SBS:PFKey(0x62) Note: Higher 2 bytes must be immediately followed by lower 2 bytes. If clear command fails, command can only be repeated 4 seconds after previous attempt. If communication other than the lower 2 bytes occurs after the first 2 bytes are sent, the Permanent Fail Clear command fails. A.1.2.11 Unseal Device (UnsealKey) Instructs the bq20z70 to enable access to the SBS functions and data flash space and clears [SS] flag. This 2 step command needs to be written to ManufacturerAccess in following order: 1st word of the UnSealKey followed by the 2nd word of the UnSealKey. This command is only available when the bq20z70 is in Sealed mode See Security chapter in this document for detailed information. Related Variables: * SBS:OperationStatus(0x54)[SS],[FAS] * SBS:UnsealKey(0x60) A.1.2.12 Full Access Device (FullAccessKey) Instructs the bq20z70 to enable full access all SBS functions and data flash space and set the [FAS] flag. This 2 step command needs to be written to ManufacturerAccess in following order: 1st word of the FullAccessKey followed by the 2nd word of the FullAccessKey. This command is only available when the bq20z70 is in Unsealed mode See Security chapter in this document for detailed information. Related Variables: * SBS:OperationStatus(0x54)[SS],[FAS] * SBS:FullAcccessKey(0x61) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 49 www.ti.com RemainingCapacityAlarm(0x01) A.1.3 Extended SBS Commands Also available via ManufacturerAccess in sealed mode are some of the extended SBS commands. The commands available are listed below. The result of these commands need to be read from ManufacturerAccess after a write to ManufacturerAccess. 0x0051 = SBS:SafetyStatus(0x51) 0x0053 = SBS:PFStatus(0x53) 0x0054 = SBS:OperationStatus(0x54) 0x0055 = SBS:ChargingStatus(0x55) 0x0057 = SBS:ResetData(0x57) 0x005a= SBS:PackVoltage(0x5a) 0x005d = SBS:AverageVoltage(0x5d) A.2 RemainingCapacityAlarm(0x01) This read or write function sets or gets a low-capacity alarm threshold unsigned integer value with a range of 0 to 65535 and units of either mAh ( CAPACITY_MODE = 0) or 10 mWh ( CAPACITY_MODE = 1). The default value for RemainingCapacityAlarm is stored in Rem Cap Alarm. If RemainingCapacityAlarm is set to 0, alarm is disabled. If RemainingCapacity < RemainingCapacityAlarm, [RCA] flag is set and bq20z70 sends AlarmWarning message to SMBUS host. If RemainingCapacity RemainingCapacityAlarm and [DSG] is set, [RCA] flag is cleared. 0 = Remaining capacity alarm is disabled 1..700 = remaining capacity limit for [RCA] flag Table A-7. RemainingCapacityAlarm SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x01 R/W unsigned integer 2 0 700 300 mAh or 10mWh RemainingCapacityAlarm Related Variables: * DF:SBS Configuration:Data(48):Rem Cap Alarm(0) * SBS:BatteryMode[CapM] * SBS:RemainingCapacity(0x0f) * SBS:BatteryStatus(0x16)[RCA],[DSG] A.3 RemainingTimeAlarm(0x02) This read or write-word function sets or gets the RemainingTimeAlarm unsigned integer value in minutes with a range of 0 to 65,535. The default value of RemaingTimeAlarm is stored in Rem Time Alarm. If RemainingTimeAlarm = 0, this alarm is disabled. If AverageTimeToEmpty < RemainingTimeAlarm, [RTA] flag is set and bq20z70 sends AlarmWarning message to SMBus host. If AverageTimeToEmpty RemainingTimeAlarm, [RTA] flag is reset 50 Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com BatteryMode(0x03) 0 = Remaining time alarm is disabled 1..30 = remaining time limit for [RTA] flag Table A-8. RemainingTimeAlarm SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x02 R/W unsigned integer 2 0 30 10 min RemainingTimeAlarm Related Variables: * DF:SBS Configuration:Data(48):Rem Time Alarm(4) * SBS:AverageTimeToEmpty(0x12) * SBS:BatteryStatus(0x16)[RTA] A.4 BatteryMode(0x03) This read- or write-word function selects the various battery operational modes and reports the battery's capabilities, modes, and flags minor conditions requiring attention. High Byte Low Byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 CapM CF ChgM RSVD AM RSVD RSVD RSVD RSVD RSVD RSVD RSVD PB PBS CC ICC LEGEND: High Byte is Read/Write, Low Byte is Read Only Figure A-2. BatteryMode CAPM: CAPACITY_MODE -- Sets the units used for capacity information and internal calculation. 0 = Reports in mA or mAh (default) 1 = Reports in 10mW or 10mWh Following functions are instantaneously updated after [CAPACITY_MODE] change: SBS:RemainingCapacityAlarm(0x01) SBS:AtRate(0x04) SBS:RemainingCapacity(0x0f) SBS:FullChargeCapacity(0x10) Following functions are recalculated within 1 second after [CAPACITY_MODE] change: SBS:RemainingTimeAlarm(0x02) SBS:AtRateTimeToEmpty(0x06) SBS:AtRateOK(0x07) SBS:RunTimeToEmpty(0x11) SBS:AverageTimeToEmpty(0x12) SBS:BatteryStatus(0x16) CHGM: CHARGER_MODE -- Enables or disables the bq20z70's transmission of ChargingCurrent and ChargingVoltage messages to the Smart Battery Charger. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 51 www.ti.com BatteryMode(0x03) 0 = Enable ChargingVoltage and ChargingCurrent broadcasts to smart battery charger by setting the [BCAST] bit in Operation Cfg B , when charging is desired. 1 = Disable ChargingVoltage and ChargingCurrent broadcasts to smart battery charger by clearing the [BCAST] bit in Operation Cfg B (default). related variables: SBS:ChargingCurrent(0x14) SBS:ChargingVoltage(0x15) 52 Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com AtRate(0x04) AM: ALARM_MODE -- enable or disable AlarmWarning broadcasts to host and smart batter charger 0 = Enable AlarmWarning broadcast to host and smart battery charger by setting the [BCAST] bit in Operation Cfg B. The bq20z70 sends the AlarmWarning messages to the SMBus Host and the Smart Battery Charger any time an alarm condition is detected 1 = Disable AlarmWarning broadcast to host and smart battery charger clearing the [BCAST] bit in Operation Cfg B (default). The bq20z70 does not master the SMBus, and AlarmWarning messages are not sent to the SMBus Host and the Smart Battery Charger. Note: The system, as a minimum, is required to poll the Smart Battery every 10 seconds if the [ALARM_MODE] flag is set. PB: PRIMARY_BATTERY -- Sets the role of the battery pack. This flag is not used by bq20z70 and should be set to 0. CC: CHARGE_CONTROLLER -- Enable or disable internal charge controller. This flag is not used by bq20z70 and should be set to 0. CF: CONDITION_FLAG -- This flag is set if MaxError > CF MaxError Limit 0 = Battery OK 1 = Condition cycle requested DF:SBS Configuration:Data(48):CF MaxError Limit (20) SBS:MaxError(0x0c) PBS: PRIMARY_BATTERY_SUPPORT -- Primary battery support is not supported by bq20z70 and is fixed to 0. ICC: INTERNAL_CHARGE_CONTROLLER -- This flag indicates if internal charge controller function is supported or not. This value is fixed to 1. A.5 AtRate(0x04) This read- or write-word function is the first half of a two-function call set used to set the AtRate value used in calculations made by the AtRateTimeToFull, AtRateTimeToEmpty and AtRateOK functions. The AtRate units are in either mA ( [CAPACITY_MODE] = 0) or 10 mW ( [CAPACITY_MODE] = 1). When the AtRate value is positive, the AtRateTimeToFull function returns the predicted time to full-charge at the AtRate value of charge. When the AtRate value is negative, the AtRateTimeToEmpty function returns the predicted operating time at the AtRate value of discharge. When the AtRate value is negative, the AtRateOK function returns a Boolean value that predicts the battery's ability to supply the AtRate value of additional discharge energy (current or power) for 10 seconds. The default value for AtRate is zero. Table A-9. AtRate SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x04 R/W AtRate signed integer 2 -32768 32767 0 mA or 10mW SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 53 www.ti.com AtRateTimeToFull(0x05) Related Variables: * SBS:AtRateTimeToFull(0x05) * SBS:AtRateTimeToEmpty(0x06) * SBS:AtRateOK(0x07) * SBS:BatteryMode(0x03)[CapM] A.6 AtRateTimeToFull(0x05) This read-word function returns an unsigned integer value of the predicted remaining time to fully charge the battery using a CC-CV method at the AtRate value in minutes, with a range of 0 to 65534. A value of 65,535 indicates that the AtRate = 0. AtRateTimeToFull can report time based on constant current ( [CAPACITY_MODE] = 0) or constant power ( [CAPACITY_MODE] = 1), and updates within one second after the SMBus host sets the AtRate value. The bq20z70 automatically updates AtRateTimeToFull based on the AtRatefunction at one-second intervals. 0..65534 = predicted time to full charge, based on AtRate 65535 = no charge or discharge ( AtRate is 0) Table A-10. AtRateTimeToFull SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x05 R unsigned integer 2 0 65535 - min AtRateTimeToFull Related Variables: * SBS:AtRate(0x04) * SBS:BatteryMode(0x03)[CapM] A.7 AtRateTimeToEmpty(0x06) This read-word function returns an unsigned integer value of the predicted remaining operating time in minutes with a range of 0 to 65534, if the battery is discharged at the AtRate value. A value of 65,535 indicates that AtRate = 0. AtRateTimeToEmpty can report time based on constant current ( [LDMD] = 0), or constant power ( [LDMD] = 1), and is updated within one second after the SMBus host sets the AtRate value. The bq20z70 updates AtRateTimeToEmpty at one-second intervals. 0..65534 = predicted remaining operating time, based on AtRate 65535 = no charge or discharge ( AtRate is 0) Table A-11. AtRateTimeToEmpty SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x06 R AtRateTimeToEmpty unsigned integer 2 0 65535 - min Related Variables: * SBS:AtRate(0x04) * SBS:OperationStatus(0x54)[LDMD] 54 Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com AtRateOK(0x07) A.8 AtRateOK(0x07) This read-word function returns a boolean value that indicates whether or not the battery can deliver the AtRate value of energy for 10 seconds. The bq20z70 updates this value within one second after the SMBus host sets the AtRate function value. The bq20z70 updates AtRateOK at one-second intervals. If AtRate function returns 0, AtRateOK always returns TRUE. 0 = FALSE bq20z70 can not deliver energy for 10 seconds actual discharge rate indicated in AtRate 1..65535 TRUE = bq20z70 deliver energy for 10 seconds actual discharge rate indicated in AtRate Table A-12. AtRateOK SBS Cmd. Mode Name 0x07 R AtRateOK unsigned integer Format Size in Bytes Min Value Max Value Default Value Unit 2 65535 - min 0 Related Variables: * SBS:AtRate(0x04) A.9 Temperature(0x08) This read-word function returns an unsigned integer value of the temperature in units of 0.1K, as measured by the bq20z70. It has a range of 0 to 6553.5K. The source of the measured temperature is configured by [TEMP1], [TEMP0] bits in the Operation Cfg A register. Table A-13. Temperature SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x08 R Temperature unsigned integer 2 65535 - 0.1K 0 Related Variables: * DF:Configuration:Register(64):Operation Cfg A(0) A.10 Voltage(0x09) This read-word function returns an unsigned integer value of the sum of the individual cell voltage measurements in mV with a range of 0 to 20000 mV. Table A-14. Voltage SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x09 R Voltage unsigned integer 2 20000 - mV 0 A.11 Current(0x0a) This read-word function returns a signed integer value of the measured current being supplied (or accepted) by the battery in mA, with a range of -32,768 to 32,767. A positive value indicates charge current and negative indicates discharge. Any current value within the Deadband will be reported as 0mA by the Current function. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 55 www.ti.com AverageCurrent(0x0b) Table A-15. Current SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x0a R Current signed integer 2 32767 - mA -32768 Related Variables: * DF:Calibration:Current(107):Deadband(1) Note: Current function is the average of 4 internal current measurements over a one-second period. A.12 AverageCurrent(0x0b) This read-word function returns a signed integer value that approximates a one-minute rolling average of the current being supplied (or accepted) through the battery terminals in mA, with a range of -32,768 to 32,767. AverageCurrent is calculated by a rolling IIR filtered average of Current function data with a period of 14.5s. During the time after a reset and before 14.5s has elapsed the reported AverageCurrent = Current function value. Table A-16. AverageCurrent SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x0b R AverageCurrent signed integer 2 32767 - mA -32768 Related Variables: * DF:Calibration:Current(107):Filter(0) * SBS:Current(0x0a) A.13 MaxError(0x0c) This read-word function returns an unsigned integer value of the expected margin of error, in %, in the state-of-charge calculation with a range of 1 to 100%. Internally MaxError is incremented 0.05% for every increment of CylceCount after the last Qmax update. The displayedMaxError is incremented by 1% points. Event MaxError Setting Full Reset set to 100% Ra table update set to 5% Qmax update set to 3% Qmax and Ra table update set to 1% Table A-17. MaxError SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x0c R MaxError unsigned integer 1 100 - % 0 Related Variables: * SBS:CycleCount(0x17) 56 Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com RelativeStateOfCharge(0x0d) A.14 RelativeStateOfCharge(0x0d) This read-word function returns an unsigned integer value of the predicted remaining battery capacity expressed as a percentage of FullChargeCapacity, in %, with a range of 0 to 100%, with fractions of % rounded up. If RSOCL bit, in Operation Cfg C, is set, then RelativeStateOfCharge is held at 99% until primary charge termination occurs and displays 100% only upon entering primary charge termination state. If RSOCL bit, in Operation Cfg C, is cleared, then RelativeStateOfCharge is not held at 99% until primary charge termination occurs. Fractions of % greater than 99% are rounded up to display 100%. Table A-18. RelativeStateOfCharge SBS Cmd. Mode Name Format Size in Bytes Min Max Value Value Default Value Unit 0x0d R RelativeStateOfCharge unsigned integer 1 0 - % 100 Related Variables: * SBS:FullChargeCapacity(0x10) * DF:Configuration:Registers(64):Operation Cfg C(4)[RSOCL] A.15 AbsoluteStateOfCharge(0x0e) This read-word function returns an unsigned integer value of the predicted remaining battery capacity expressed in %, with a range of 0 to 100% with any fractions of % rounded up. The table below shows the calculation used depending on CAPACITY_MODE flag. CAPACITY_MODE AbsoluteStateOfCharge Calculation 0 = RemainingCapacity / Design Capacity 1 = RemainingCapacity / Design Energy Note: AbsoluteStateOfCharge can return values > 100%. Table A-19. AbsoluteStateOfCharge SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x0e R AbsoluteStateOfCharge unsigned integer 1 0 100 - % Related Variables: * DF:SBS Configuration:Data(48):Design Capacity(22) * DF:SBS Configuration:Data(48):Design Energy(24) * SBS:BatteryMode(0x03)[CapM] * SBS:RemainingCapacity(0x0f) A.16 RemainingCapacity(0x0f) This read-word function returns an unsigned integer value, with a range of 0 to 65535, of the predicted charge or energy remaining in the battery. This value is expressed in either charge (mAh) or energy (10 mWh), depending on the setting of [CAPACITY_MODE] flag. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 57 www.ti.com FullChargeCapacity(0x10) Table A-20. RemainingCapacity SBS Cmd. Mode Name Format Size in Min Bytes Value Max Value Default Value Unit 0x0f R RemainingCapacity unsigned integer 2 65535 - mAh or 10mWh 0 Related Variables: * SBS:BatteryMode(0x03)[CapM] A.17 FullChargeCapacity(0x10) This read-word function returns an unsigned integer value, with a range of 0 to 65535, of the predicted pack capacity when it is fully charged. This value is expressed in either charge (mAh) or power (10 mWh) depending on setting of [CAPACITY_MODE] flag. Table A-21. FullChargeCapacity SBS Cmd. Mode Name Format Size Min Max in Value Value Bytes Default Value Unit 0x10 R FullChargeCapacity unsigned integer 2 - mAh or 10mWh 0 65535 Related Variables: * SBS:BatteryMode(0x03)[CapM] A.18 RunTimeToEmpty(0x11) This read-word function returns an unsigned integer value of the predicted remaining battery life at the present rate of discharge, in minutes, with a range of 0 to 65,534 min. A value of 65,535 indicates battery is not being discharged. This value is calculated and updated based on current or power, depending on the setting of [CAPACITY_MODE] flag. Table A-22. RunTimeToEmpty SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x11 R RunTimeToEmpty unsigned integer 2 0 65535 - min Related Variables: * SBS:BatteryMode(0x03)[CAPACITY_MODE] A.19 AverageTimeToEmpty(0x12) This read-word function returns an unsigned integer value of predicted remaining battery life, in minutes, based upon AverageCurrent with a range of 0 to 65534. A value of 65,535 indicates that the battery is not being discharged. This value is calculated based on current or power, depending on the setting of the [CAPACITY_MODE] flag. 0..65534 = predicted remaining battery life, based on AverageCurrent 65535 = battery is not being discharged 58 Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com AverageTimeToFull(0x13) Table A-23. AverageTimeToEmpty SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x12 R unsigned integer 2 65535 - min AverageTimeToEmpty 0 Related Variables: * SBS:BatteryMode(0x03)[CapM] * SBS:AverageCurrent(0x0b) A.20 AverageTimeToFull(0x13) This read-word function returns an unsigned integer value of predicted remaining time until the battery reaches full charge, in minutes, based on AverageCurrent with a range of 0 to 65,535. A value of 65,535 indicates that the battery is not being charged. 0..65534 = predicted remaining time until full charge 65535 = battery is not being charged Table A-24. AverageTimeToFull SBS Cmd. Mode Name 0x13 R Format AverageTimeToFull unsigned integer Size in Bytes Min Value Max Value Default Value Unit 2 65535 - 0 min Related Variables: * SBS:AverageCurrent(0x0b) A.21 ChargingCurrent(0x14) This read-word function returns an unsigned integer value of the desired charging rate, in mA, with a range of 0 to 65,535. A value of 65,535 indicates that a charger should operate as a voltage source outside its maximum regulated current range. 0..65534 = desired charging voltage in mA 65535 = charger should operate as voltage source outside it's maximum regulated voltage range Table A-25. ChargingCurrent SBS Cmd. Mode Name Format 0x14 R ChargingCurrent unsigned integer 2 Size in Bytes Min Value 0 Max Value Default Value Unit 65535 - mA A.22 ChargingVoltage(0x15) This read-word function returns an unsigned integer value of the desired charging voltage, in mV, where the range is 0 to 65,535. A value of 65,535 indicates that the charger should operate as a current source outside its maximum regulated voltage range. 0..65534 = desired charging voltage in mV 65535 = charger should operate as current source outside it's maximum regulated voltage range Table A-26. ChargingVoltage SBS Cmd. Mode Name Format 0x15 R ChargingVoltage unsigned integer 2 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Size in Bytes Min Value 0 Max Value Default Value Unit 65535 - mV Standard SBS Commands 59 www.ti.com BatteryStatus(0x16) A.23 BatteryStatus(0x16) This read-word function returns the status of the bq20z70-based battery. High Byte Low Byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 OCA INIT TCA DSG RSVD FC OTA FD TDA EC3 RSVD EC2 RCA EC1 RTA EC0 LEGEND: All Values Read Only Figure A-3. BatteryStatus OCA -- 1 = Over Charged Alarm TCA -- 1 = Terminate Charge Alarm OTA -- 1 = Over Temperature Alarm TDA -- 1 = Terminate Discharge Alarm RCA -- Remaining Capacity Alarm 1 = Remaining Capacity Alarm is set see: SBS:RemainingCapacityAlarm(0x01) RTA -- Remaining Time Alarm 1 = Remaining Time Alarm is set see: SBS:RemainingTimeAlarm(0x02) INIT -- 1 = Initialization. This flag is cleared approx. 1 after device reset, after all SBS parameters have been measured and updated DSG -- Discharging 0 = bq20z70 is in charging mode 1 = bq20z70 is in discharging mode, relaxation mode or valid charge termination has occurred see: "Gas Gauging Mode" chapter in this document FC -- 1 = Fully Charged FD -- 1 = Fully Discharged EC3, EC2, EC1, EC0 -- Error Code, returns status of processed SBS function 60 0,0,0,0 OK = bq20z70 processed the function code with no errors detected. 0,0,0,1 BUSY = bq20z70 is unable to process the function code at this time. 0,0,1,0 Reserved = bq20z70 detected an attempt to read or write to a function code reserved by this version of the specification or bq20z70 detected an attempt to access an unsupported optional manufacturer function code. Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com CycleCount(0x17) 0,0,1,1 Unsupported = bq20z70 does not support this function code. 0,1,0,0 AccessDenied = bq20z70 detected an attempt to write to a read-only function code. 0,1,0,1 Over/Underflow = bq20z70 detected a data overflow or underflow. 0,1,1,0 BadSize = bq20z70 detected an attempt to write to a function code with an incorrect data block. 0,1,1,1 UnknownError = bq20z70 detected an unidentifiable error. A.24 CycleCount(0x17) This read-word function returns, as an unsigned integer value, the number of cycles the battery has experienced, with a range of 0 to 65,535. The default value is stored in dataflash value Cycle Count which is updated each time this variable is incremented. One cycle count is accumulated discharge of CC Threshold. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-27. CycleCount SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x17 R/W CycleCount unsigned integer 2 0 65535 0 Unit Related Variables: * DF:SBS Configuration:Data(48)Cycle Count(16) * DF:SBS Configuration:Data(48)CC Threshold(18) * SBS:OperationStatus(0x54)[SS],[FAS] A.25 DesignCapacity(0x18) This read-word function returns, as an unsigned integer value, the theoretical or nominal capacity of a new pack, stored in Design Capacity or in Design Energy. The DesignCapacity value is expressed in either current (mAh at a C/5 discharge rate) or power, (0.1 mWh at a P/5 discharge rate) depending on the setting of [CAPACITY_MODE] bit. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-28. DesignCapacity SBS Cmd. Mode Name CAPACITY_MO DE Format Size in Bytes Min Value Max Value Default Value Unit 0x18 R/W 0 unsigned integer 2 0 65535 4400 mAh 1 unsigned integer 2 0 65535 6336 0.1 mWh DesignCapacity Related Variables: * DF:SBS Configuration:Data(48):Design Capacity(22) * DF:SBS Configuration:Data(48):Design Energy(24) * SBS:BatteryMode(0x03)[CapM] * SBS:OperationStatus(0x54)[SS],[FAS] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 61 www.ti.com DesignVoltage(0x19) A.26 DesignVoltage(0x19) This read-word function returns an unsigned integer value of the theoretical voltage of a new pack, in mV, with a range of 0 to 65,535. The default value is stored in Design Voltage. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-29. DesignVoltage SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x19 R/W unsigned integer 2 7000 18000 14400 mV DesignVoltage Related Variables: * DF:SBS Configuration:Data(48):Design Voltage(8) * SBS:OperationStatus(0x54)[SS] * SBS:OperationStatus(0x54)[FAS] A.27 SpecificationInfo(0x1a) This read-word function returns, as an unsigned integer value, the version number of the Smart Battery Specification the battery pack supports, as well as voltage- and current-scaling information. Power scaling is the product of the voltage scaling times the current scaling. The data is packed in the following fashion: IPScale x 0x1000 + VScale x 0x0100 + SpecID_H x 0x0010 + SpecID_L VScale (voltage scaling) and IPScale (current scaling) should always be set to zero. The default setting is stored in Spec Info. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-30. SpecificationInfo 15 SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x1a R/W SpecificationInfo hex 2 0xffff 0x0031 14 13 12 IPScal e (0) (multip lies current by 10 11 10 9 8 VScale (0) (multip lies voltag e by 10 VScale ) IPScale ) 0x0000 7 6 5 SpecI D_H(0. .15) 4 3 2 Unit 1 0 SpecI D_L (0..15) LEGEND: R/W = Read/Write; R = Read only; - n = value after reset Figure A-4. SpecificationInfo Related Variables: * DF:SBS Configuration:Data(48):Spec Info(10) * SBS:OperationStatus(0x54)[SS],[FAS] A.28 ManufactureDate(0x1b) This read-word function returns the date the pack was manufactured in a packed integer. The date is packed in the following fashion: (year-1980) x 512 + month x 32 + day 62 Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com SerialNumber(0x1c) The default value for this function is stored in Manuf Date. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-31. ManufacturerDate 15 SBS Cmd. Mode Name 0x1b R/W ManufacturerDate unsigned integer 14 13 12 Format 11 10 9 Year biased by 1980 (0..127 ) Size in Bytes Min Value Max Value Default Value 2 65535 0 8 0 7 6 5 4 Month (1..12) MSB LSB 3 2 Unit 1 0 Date (0..31) MSB LSB MSB LSB Figure A-5. ManufacturerDate Related Variables: * DF:SBS Configuration:Data(48):Manuf Date(12) * SBS:OperationStatus(0x54)[SS],[FAS] A.29 SerialNumber(0x1c) This read-word function is used to return an unsigned integer serial number. The default value of this function is stored in Ser. Num.. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-32. SerialNumber SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x1c R/W hex 2 0xffff 0x0001 SerialNumber 0x0000 Unit Related Variables: * DF:SBS Configuration:Data(48):Ser. Num.(14) * SBS:OperationStatus(0x54)[SS],[FAS] A.30 ManufacturerName(0x20) This read-block function returns a character string containing the battery manufacturer's name with a maximum length of 11 characters (11 data + length byte). The default setting of this function is stored in dataflash Manuf Name. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-33. ManufacturerName SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x20 R/W String 11+1 - Texas Inst. ASCII ManufacturerName - Related Variables: * DF:SBS Configuration:Data(48):Manuf Name(26) * SBS:OperationStatus(0x54)[SS],[FAS] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Standard SBS Commands 63 www.ti.com DeviceName(0x21) A.31 DeviceName(0x21) This read-block function returns a character string that contains the battery name with a maximum length of 7 characters (7 data + length byte). The default setting of this function is stored in dataflash Device Name. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-34. DeviceName SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x21 R/W DeviceName String 7+1 - bq20z70 ASCII - Related Variables: * DF:SBS Configuration:Data(48):Device Name(38) * SBS:OperationStatus(0x54)[SS],[FAS] A.32 DeviceChemistry(0x22) This read-block function returns a character string that contains the battery chemistry with a maximum length of 4 characters (4 data + length byte). The default setting of this function is in stored in dataflash Device Chemistry although it has no use for internal charge control or fuel gauging. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-35. DeviceChemistry SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x22 R/W String 4+1 - LION ASCII DeviceChemistry - Related Variables: * DF:SBS Configuration:Data(48):Device Chemistry(46) * SBS:OperationStatus(0x54)[SS],[FAS] A.33 ManufacturerData(0x23) This read-block function returns several configuration data flash elements with an absolute maximum length of 7 Data + 1 length byte (stored in Manufacturer Data Length). The Manufacturing data elements shown below are stored in the Manufacturer Data subclass. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table A-36. ManufacturerData Data Byte Name Format Manufacturer Data 0 Firmware Version hex 1 bq20z70 Counter 64 2 Hardware Revision 3 Partial Reset Counter 4 Full Reset Counter 5 Watchdog Reset Counter 6 Check Sum 7 String Length Byte Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Authenticate(0x2f) Related Variables: * SBS:OperationStatus(0x54)[SS],[FAS] A.34 Authenticate(0x2f) This read/write-block function allows the host to authenticate the bq20z70-based battery using a SHA-1 authentication transform with a length of 20 data bytes + 1 length byte. See SHA-1 Authentication chapter and Using SHA-1 in bq20zxx Family of Gas Gauges application report ( SLUA359) for detailed information. Table A-37. Authenticate SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x2f R/W Authenticate String 20+1 - - - Unit Related Variables: * none A.35 CellVoltage4..1(0x3c..0x3f) These read-word functions return an unsigned value of the calculated individual cell voltages, in mV, with a range of 0 to 65,535. CellVoltage1 corresponds to the bottom most series cell element, while CellVoltage4 corresponds to the top most series cell element. Table A-38. CellVoltage4..1 SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x3c R CellVoltage4 unsigned Integer 2 0 65535 - mV 0x3d CellVoltage3 - 0x3e CellVoltage2 - 0x3f CellVoltage1 - Related Variables: * none A.36 SBS Command Values Table A-39. SBS COMMANDS SBS Cmd Mode Name Format Size in Min Bytes Value Max Value Default Value 0x00 R/W ManufacturerAccess hex 2 0x0000 0xffff -- 0x01 R/W RemainingCapacityAlarm unsigned int 2 0 65535 -- mAh or 10mWh 0x02 R/W RemainingTimeAlarm unsigned int 2 0 65535 -- min 0x03 R/W BatteryMode hex 2 0x0000 0xffff -- 0x04 R/W AtRate signed int 2 -32768 32767 -- mA or 10mW 0x05 R AtRateTimeToFull unsigned int 2 0 65535 -- min 0x06 R AtRateTimeToEmpty unsigned int 2 0 65535 -- min 0x07 R AtRateOK unsigned int 2 0 65535 -- 0x08 R Temperature unsigned int 2 0 65535 -- 0.1K 0x09 R Voltage unsigned int 2 0 20000 -- mV 0x0a R Current signed int 2 -32768 32767 -- mA SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Unit Standard SBS Commands 65 www.ti.com SBS Command Values Table A-39. SBS COMMANDS (continued) 66 SBS Cmd Mode Name Format Size in Min Bytes Value Max Value Default Value Unit 0x0b R AverageCurrent signed int 2 -32768 32767 -- mA 0x0c R MaxError unsigned int 1 0 100 -- % 0x0d R RelativeStateOfCharge unsigned int 1 0 100 -- % 0x0e R AbsoluteStateOfCharge unsigned int 1 0 100 -- % 0x0f R/W RemainingCapacity unsigned int 2 0 65535 -- mAh or 10mWh 0x10 R FullChargeCapacity unsigned int 2 0 65535 -- mAh or 10mWh 0x11 R RunTimeToEmpty unsigned int 2 0 65535 -- min 0x12 R AverageTimeToEmpty unsigned int 2 0 65535 -- min 0x13 R AverageTimeToFull unsigned int 2 0 65535 -- min 0x14 R ChargingCurrent unsigned int 2 0 65535 -- mA 0x15 R ChargingVoltage unsigned int 2 0 65535 -- mV 0x16 R BatteryStatus unsigned int 2 0x0000 0xffff -- 0x17 R/W CycleCount unsigned int 2 0 65535 -- 0x18 R/W DesignCapacity unsigned int 2 0 65535 -- mAh or 10mWh 0x19 R/W DesignVoltage unsigned int 2 7000 16000 14400 mV 0x1a R/W SpecificationInfo unsigned int 2 0x0000 0xffff 0x0031 0x1b R/W ManufactureDate unsigned int 2 0 65535 0 0x1c R/W SerialNumber hex 2 0x0000 0xffff 0x0001 0x20 R/W ManufacturerName String 11+1 -- -- Texas Instruments ASCII 0x21 R/W DeviceName String 7+1 -- -- bq20z70 ASCII 0x22 R/W DeviceChemistry String 4+1 -- -- LION ASCII 0x23 R ManufacturerData String 14+1 -- -- -- ASCII 0x2f R/W Authenticate String 20+1 -- -- -- ASCII 0x3c R CellVoltage4 unsigned int 2 0 65535 -- mV 0x3d R CellVoltage3 unsigned int 2 0 65535 -- mV 0x3e R CellVoltage2 unsigned int 2 0 65535 -- mV 0x3f R CellVoltage1 unsigned int 2 0 65535 -- mV Standard SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Appendix B SLUU250A - June 2006 - Revised June 2006 Extended SBS Commands The extended SBS commands are only available when bq20z70 device is in unsealed mode and full access mode, indicated by the [SS] flag. Related Variables: * SBS:ManufacturerAccess(0x00):Seal Access(0x0020) * SBS:OperationStatus(0x54)[SS] * SBS:UnSealKey(0x60) * SBS:FullAccessKey(0x61) B.1 AFEData(0x45) This read-block function returns a string of 11 data bytes + 1 length byte. The first 9 bytes are the bq29330 memory map followed by 2 bytes of the internal bq20z70 AFE_Fail_Counter. Table B-1. AFEData Data Byte Name Format bq29330 0 AFE Status hex 1 AFE Output 2 AFE State 3 AFE Function 4 AFE Cell Select 5 AFE OLV 6 AFE OLT 7 AFE SCC 8 AFE SCD 9 internal AFE_Fail_Counter high byte 10 internal AFE_Fail_Counter low byte 11 String Length Byte bq20z70 Related Variables: * DF:2nd Level Safety:AFE Verification(20):AFE Fail Limit(1) B.2 FETControl(0x46) This write/read-word function allows direct control of the FETs for test purposes. bq20z70 overrides this commands unless in normal mode. bit 7 FETControl RSVD bit 6 bit 5 RSVD RSVD bit 4 bit 3 bit 2 bit 1 bit 0 OD ZVCHG CHG DSG RSVD LEGEND: RSVD = Reserved and must be programmed to 0 Figure B-1. FETControl SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Extended SBS Commands 67 www.ti.com StateOfHealth(0x4f) OD -- bq29330 GPOD pin control. 0 = disable GPOD pin (high-Z) 1 = enable GPOD pin (open drain) ZVCHG -- Zero-Volt (Pre-Charge) charge FET Control 0 = turn OFF pre-charge FET 1 = turn ON pre-charge FET CHG -- Charge FET Control 0 = turn OFF CHG FET. CHG FET doesn't turn off in discharge mode to protect the FET body diode. 1 = turn ON CHG FET DSG -- Discharge FET Control 0 = turn OFF DSG FET. DSG FET doesn't turn of in charge mode to protect the FET body diode. 1 = turn ON DSG FET B.3 StateOfHealth(0x4f) This read word function returns the state of health of the battery in %. The calculation formula depends on the CAPACITY_MODE flag. CAPACITY_MO StateOfHealth DE 0 = FullChargeCapacity / Design Capacity 1 = FullChargeCapacity / Design Energy Related Variables: * DF:SBS Configuration:Data(48):Design Capacity(22) * DF:SBS Configuration:Data(48):Design Energy(24) * SBS:FullChargeCapacity(0x10) * SBS:BatteryMode(0x03)[CapM] B.4 SafetyStatus(0x51) This read word function returns the status of the 1st level safety features. See the "1st Level Safety" chapter for further details. High Byte Low Byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 OTD CUV OTC COV OCD PF OCC RSVD RSVD WDF RSVD AOCD RSVD SCC RSVD SCD LEGEND: All Values Read Only Figure B-2. SafetyStatus 68 Extended SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com PFStatus(0x53) OTD -- 1 = Discharge overtemperature condition OTC -- 1 = Charge overtemperature condition OCD -- 1 = Discharge overcurrent condition OCC -- 1 = Charge overcurrent condition CUV -- 1 = Cell undervoltage condition COV -- 1 = Cell overvoltage condition PF -- 1 = Permanent failure and SAFE pin has been driven high. WDF -- 1 = AFE watchdog condition AOCD -- 1 = Discharge overcurrent condition SCC -- 1 = Charge short-circuit condition SCD -- 1 = Discharge short-circuit condition B.5 PFStatus(0x53) The permanent failure status register indicates the source of the bq20z70 permanent-failure condition. Any new permanent failure is added to PF Flags 1 register to show all permanent failures occurred. See the 2nd Level Safety chapter for further details. Related Variables: * DF:Configuration:Registers(64):Permanent Fail Cfg(6) * DF:PF Status:Device Status Data(96):PF Flags 1(0) * DF:PF Status:Device Status Data(96):PF Flags 2(28) bit 7 High Byte Low Byte RSVD DFF bit 6 bit 5 RSVD DFETF RSVD CFETF bit 4 bit 3 bit 2 bit 1 bit 0 RSVD CIM SOCD SOTD SOCC SOTC RSVD SOV AFE_C PFIN LEGEND: All Values Read Only Figure B-3. PFStatus SOCD -- 1 = Discharge Safety Overcurrent permanent failure SOCC -- 1 = Charge Safety-Overcurrent permanent failure AFE_C -- 1 = Permanent AFE Communications failure DFF -- 1 = Dataflash Fault permanent failure DFETF -- 1 = Discharge-FET-Failure permanent failure CFETF -- 1 = Charge-FET-Failure permanent failure CIM -- 1 = Cell-Imbalance permanent failure SOTD -- 1 = Discharge Safety Overtemperature permanent failure SOTC -- 1 = Charge Safety Overtemperature permanent failure SOV -- 1 = Safety-Overvoltage permanent failure PFIN -- 1 = External Input Indication of permanent failure SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Extended SBS Commands 69 www.ti.com OperationStatus(0x54) B.6 OperationStatus(0x54) This read-word function returns the current status of the operation status of the bq20z70. bit 7 High Byte Low Byte bit 6 PRES WAKE bit 5 FAS DSG bit 4 SS XDSG bit 3 CSV RSVD bit 2 RSVD RSVD LDMD RSVD bit 1 RSVD VOK bit 0 RSVD QEN LEGEND: All Values Read Only Figure B-4. OperationStatus PRES -- 1 = PRES is low, indicating that the system is present (battery inserted). FAS -- 0 = Full access security mode SS -- 1 = Sealed mode CSV -- 1 = Data Flash checksum value has been generated LDMD -- Load mode for Impedance Track modeling. 0 = constant current, 1 = constant power WAKE -- 1 = bq20z70 WAKE mode DSG -- Replica of the SBS:BatteryStatus(0x16)[DISCHARGING] flag. XDSG -- 1 = Discharge fault VOK -- 1 = Voltages are OK for a Qmax update QEN -- 1 = Qmax updates are enabled B.7 ChargingStatus(0x55) This read-word function returns the current status of the charging functions. bit 7 High Byte Low Byte bit 6 XCHG RSVD bit 5 CHGSUSP CB bit 4 PCHG RSVD bit 3 MCHG RSVD bit 2 RSVD RSVD RSVD RSVD bit 1 FCHG OC bit 0 RSVD RSVD LEGEND: All Values Read Only Figure B-5. ChargingStatus XCHG -- 1 = Charging disabled CHGSUSP -- 1 = Charging suspend conditions exist PCHG -- 1 = Precharging conditions exist MCHG -- 1 = Maintenance charging conditions exist FCHG -- 1 = Fast charging conditions exist CB -- 1 = Cell balancing in progress OC -- 1 = Overcharge fault B.8 ResetData(0x57) This read-word function returns the number of partial resets (low byte) and full resets (high byte) the device has experienced. 70 Extended SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com WDResetData(0x58) Table B-2. ResetData B.9 SBS Cmd. Mode Name 0x57 R ResetData Format Size in Min Bytes Value Max Value Default Unit Value full resets high byte unsigned integer 1 0 255 - partial resets low byte unsigned integer 1 0 255 - WDResetData(0x58) This read-word function returns the number of watchdog resets the device has experienced. Table B-3. WDResetData SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x58 R WDResetData unsigned integer 2 0 65535 - B.10 PackVoltage(0x5a) This read-word function returns an unsigned integer representing the measured voltage from the AFE pack pin, in mV, with a range of 0 to 65,535. Table B-4. PackVoltage SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x5a R PackVoltage unsigned integer 2 0 65535 - mV B.11 AverageVoltage(0x5d) This read-word function returns a signed integer value that approximates a one-minute rolling average of the sum of cell voltages in mV, with a range of 0 to 65,535. Table B-5. AverageVoltage SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x5d R AverageVoltage unsigned integer 2 0 65535 - mV Related Variables: * SBS:Voltage(0x09) B.12 UnSealKey(0x60) This read/write block command allows the user to change the Unseal key for the Sealed-to-Unsealed security-state transition. This function is only available when the bq20z70 is in the Full-Access mode, indicated by a cleared [FAS] flag. The order of the bytes entered in ManufacturerAccess is the reverse of what is read from or written to the part. For example, if the 1st and 2nd word of the UnSealKey block read returns 0x1234 and 0x5678, then in ManufacturerAccess, you should enter 0x3412 and 0x7856 to unseal the part. Table B-6. UnSealKey SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x60 R/W UnSealKey hex 4 0x00000000 0xffffffff - Unit Related Variables: * SBS:OperationStatus(0x54)[FAS] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Extended SBS Commands 71 www.ti.com FullAccessKey(0x61) B.13 FullAccessKey(0x61) This read/write block command allows the user to change the Full-Access security key for the Unsealed-to-Full-Access security-state transition. This function is only available when the bq20z70 is in the Full-Access mode, indicated by a cleared [FAS] flag. The order of the bytes entered in ManufacturerAccess is the reverse of what is read from or written to the part. For example, if the 1st and 2nd word of the FullAccessKey block read returns 0x1234 and 0x5678, then in ManufacturerAccess, you should enter 0x3412 and 0x7856 to put the part in full access mode. Table B-7. FullAccessKey SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x61 R/W FullAccessKey hex 4 0x00000000 0xffffffff - Unit Related Variables: * SBS:OperationStatus(0x54)[FAS] B.14 PFKey(0x62) This read/write block command allows the user to change the Permanent-Failure-Clear key. This function is only available when the bq20z70 is in the Full Access mode, indicated by a cleared [FAS] flag. The order of the bytes entered in ManufacturerAccess is the reverse of what is read from or written to the part. For example, if the 1st and 2nd word of the PFKey block read returns 0x1234 and 0x5678, then in ManufacturerAccess, you should enter 0x3412 and 0x7856 to clear permanent failure. The default key values for permanent fail clear are 0x2673 and 0x1712. Table B-8. PFKey SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x62 R/W PFKey hex 4 0x00000000 0xffffffff Unit - Related Variables: * SBS:OperationStatus(0x54)[FAS] B.15 AuthenKey3(0x63) This read/write block command stores Byte 12 - Byte 15 of the 16 Byte long authentication key. This function is only available when the bq20z70 is in the Full Access mode, indicated by a cleared [FAS] flag. Table B-9. AuthenKey3 SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x62 R/W AuthenKey3 hex 4 0x00000000 0xffffffff 0x10325476 Unit Related Variables: * none B.16 AuthenKey2(0x64) This read/write block command stores Byte 8 - Byte 11 of the 16 Byte long authentication key. This function is only available when the bq20z70 is in the Full Access mode, indicated by a cleared [FAS] flag. 72 Extended SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com AuthenKey1(0x65) Table B-10. AuthenKey2 SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x64 R/W AuthenKey2 hex 4 0x00000000 0xffffffff 0x98BADCFE Unit Related Variables: * none B.17 AuthenKey1(0x65) This read/write block command stores Byte 4 - Byte 7 of the 16 Byte long authentication key. This function is only available when the bq20z70 is in the Full Access mode, indicated by a cleared [FAS] flag. Table B-11. AuthenKey1 SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x65 R/W AuthenKey1 hex 4 0x00000000 0xffffffff 0xEFCDAB89 Related Variables: * none B.18 AuthenKey0(0x66) This read/write block command stores Byte 0 - Byte 3 of the 16 Byte long authentication key. This function is only available when the bq20z70 is in the Full Access mode, indicated by a cleared [FAS] flag. Table B-12. AuthenKey0 SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x66 R/W AuthenKey0 hex 4 0x00000000 0xffffffff 0x67452301 Unit Related Variables: * none B.19 ManufacturerInfo(0x70) This read-block function returns the data stored in Manuf. Info where byte 0 is the MSB with a maximum length of 8 data + 1 length byte. When the bq20z70 is in Unsealed or Full Access mode, this block is R/W. Table B-13. ManfacturerInfo SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x70 R/W ManufacturerInf o string 8+1 - - - Unit Related Variables: * DF:System Data:Manufactuer Info(58):Manuf. Info(0) * SBS:OperationStatus(0x54)[SS],[FAS] B.20 SenseResistor(0x71) This read/write command allows the user to change the sense resistor value used in . The bq20z70 automatically updates the respective calibration data on receipt of a new sense resistor value. Table B-14. SenseResistor SBS Cmd. Mode Name Format 0x71 R/W SenseResistor unsigned integer 2 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Size in Bytes Min Value 0 Max Value Default Value Unit 65535 - Extended SBS Commands 73 www.ti.com DataFlashSubClassID(0x77) B.21 DataFlashSubClassID(0x77) This write word function set the bq20z70 dataflash subclass, where data can be accessed by following DataFlassSubClass1..8 commands. See "Data Flash Access" chapter for further information. A NACK is returned to this command if the value of the class is outside of the allowed range. The subclasses are defined in the Data Flash. Table B-15. DataFlashSubClassID SBS Cmd. Mode Name Format Size in Bytes Min Value Max Value Default Value 0x77 W DataFlashSubClassID hex 2 0x0000 0xffff - Unit Related Variables: * SBS:DataflashSubClass1..8(0x78..0x7f) B.22 DataFlashSubClassPage1..8(0x78..0x7f) These commands are used to access the consecutive 32-byte pages of each subclass. DataFlashSubClassPage1 gets byte 0 to 31 of the subclass, DataFlashSubClassPage2 get bytes 32 to 63, and so on. Note: Any DF location deemed Reserved responds with a NACK unless the bq20z70 is in the correct security state to allow access. Table B-16. DataFlashSubClass1..8 SBS Cmd. Mode Name Format Size in Bytes 0x78 R/W DataFlashSubClassPage1 hex 32 0x79 R/W DataFlashSubClassPage2 hex 32 0x7a R/W DataFlashSubClassPage3 hex 32 0x7b R/W DataFlashSubClassPage4 hex 0x7c R/W DataFlashSubClassPage5 0x7d R/W 0x7e 0x7f Subclass Offset Subclass Offset Default Value 0 31 - 32 63 - 64 95 - 32 96 127 - hex 32 128 159 - DataFlashSubClassPage6 hex 32 160 191 - R/W DataFlashSubClassPage7 hex 32 192 223 - R/W DataFlasClasshSubClass8 hex 32 224 255 - Unit Related Variables: * SBS:DataFlashSubClassID(0x77) B.23 Extended SBS Command Values 74 Extended SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Extended SBS Command Values Table B-17. EXTENDED SBS COMMANDS SBS Cmd Mode Name Format Size in Bytes Min Value Max Value Default Value Unit 0x45 R AFEData String 11+1 -- -- -- ASCII 0x46 R/W FETControl hex 1 0x00 0xff -- 0x4f R StateOfHealth unsigned int 1 0 100 -- 0x51 R SafetyStatus hex 2 0x0000 0xffff -- 0x53 R PFStatus hex 2 0x0000 0xffff -- 0x54 R OperationStatus hex 2 0x0000 0xffff -- 0x55 R ChargingStatus hex 2 0x0000 0xffff -- 0x57 R ResetData hex 2 0x0000 0xffff -- 0x5a R PackVoltage unsigned int 2 0 65535 -- mV 0x5d R AverageVoltage unsigned int 2 0 65535 -- mV 0x60 R/W UnSealKey hex 4 0x00000000 0xffffffff -- 0x61 R/W FullAccessKey hex 4 0x00000000 0xffffffff -- 0x62 R/W PFKey hex 4 0x00000000 0xffffffff -- 0x63 R/W AuthenKey3 hex 4 0x00000000 0xffffffff -- 0x64 R/W AuthenKey2 hex 4 0x00000000 0xffffffff -- 0x65 R/W AuthenKey1 hex 4 0x00000000 0xffffffff -- 0x66 R/W AuthenKey0 hex 4 0x00000000 0xffffffff -- 0x70 R/W ManufacturerInfo String 8+1 -- -- -- 0x71 R/W SenseResistor unsigned int 2 0 65535 -- 0x77 R/W DataFlashSubClassID hex 2 0x0000 0xffff -- 0x78 R/W DataFlashSubClassPage1 hex 32 -- -- -- 0x79 R/W DataFlashSubClassPage2 hex 32 -- -- -- 0x7a R/W DataFlashSubClassPage3 hex 32 -- -- -- 0x7b R/W DataFlashSubClassPage4 hex 32 -- -- -- 0x7c R/W DataFlashSubClassPage5 hex 32 -- -- -- 0x7d R/W DataFlashSubClassPage6 hex 32 -- -- -- 0x7e R/W DataFlashSubClassPage7 hex 32 -- -- -- 0x7f R/W DataFlashSubClassPage8 hex 32 -- -- -- SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback % Extended SBS Commands 75 www.ti.com Extended SBS Command Values 76 Extended SBS Commands SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Appendix C SLUU250A - June 2006 - Revised June 2006 Data Flash CAUTION Care should be taken when mass programming the data flash space using previous versions of data flash memory map files (such as *.gg files) to ensure all public locations are updated correctly. Data Flash can only be updated if Voltage Flash Update OK Voltage or PackVoltageCharger Present. Data flash reads and writes are verified according to the method detailed in the 2nd Level Safety section of this data sheet. Note: Data Flash updates are disabled when [PF] SafetyStatus flag is set. C.1 Accessing Data Flash In different security modes, the data flash access conditions change. See ManufacturerAccess and "Security" chapter for further details. SECURITY MODE NORMAL DATA FLASH ACCESS BootROM N/A Full Access R/W Unsealed R/W Sealed N/A C.1.1 Data Flash Interface The bq20z70 data flash is organized into subclasses where each data flash variable is assigned an offset within its numbered subclass. For example: the Pre-chg Temp threshold location is defined as: * Class = Charge Control * SubClass = Pre-Charge Cfg = 33 * Offset = 2 Note: Data Flash commands are NACK'ed if bq20z70 is in sealed mode ( [SS] flag is set). Each subclass can be addressed individually by using the DataFlashSubClassID command and the data within each subclass is accessed by using the DataFlashSubClassPage1..8 commands. Reading and Writing subclass data are block operations which are 32 Bytes long each. but data can be written in shorter block sizes. The final block in one subclass can be shorter than 32 bytes so care must be taken not to write over the subclass boundary. None of the values written are bounded by the bq20z70 and the values are not rejected by the gas gauge. Writing an incorrect value may result in hardware failure due to firmware program interpretation of the invalid data. The data written is persistent, so a Power On Reset does resolve the fault. Related Variables: * SBS:DataFlashSubClassID(0x77) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 77 www.ti.com Accessing Data Flash * SBS:DataFlashSubClassPage1..8(0x78..0x7f) C.1.2 Reading a SubClass Information required: * SubClassID * Number of bytes in the subclass * Variable Offset Procedure: 1. Write the SubClassID to bq20z70 using DataFlashSubClassID command. 2. Read a block of data using DataFlashSubClassPage1..8 command. A subclass can hold up to 256 bytes of data, but subclass data can only be read in 32 byte long data blocks. The DataFlashSubClassPage1 command reads only the first 32 bytes in a subclass, the DataFlashSubClassPage2 command reads the second 32 bytes in a subclass and so on. For example if the subclass has 40 bytes, DataFlashSubClassPage1 + DataFlashSubClassPage1 is needed to read the whole subclass. C.1.3 Writing a SubClass Information required: * SubClassID * Number of bytes in the subclass * 32 bytes of initialized data to be written. Less than 32 bytes is acceptable if a subclass contains less than 32 bytes in the last block. Procedure: 1. Write the SubClassID to bq20z70 using DataFlashSubClassID command. 2. Write a block of data using DataFlashSubClassPage1..8 command. A subclass can hold up to 256 bytes of data, but subclass data can only be write in 32 byte long data blocks. The DataFlashSubClassPage1 command writes only the first 32 bytes in a subclass, the DataFlashSubClassPage2 command writes the second 32 bytes in a subclass and so on. For example if the subclass has 40 bytes and data in offset 34 of the subclass needs to be changed, use DataFlashSubClassPage2 to write data from byte 32 - 40 of the subclass. C.1.4 Example To write the value of Term Voltage to a value of 8.7 V the following sequence is used. Read complete Gas Gauging-IT Cfg subclass (SubclassID = 80) into RAM: * Write Subclass ID - SMB Slave Address (0x16) - SMB CMD 0x77 with 0x0050 as data (=80 decimal) * Read Subclass (2 blocks are needed as its over 32 bytes long) - SMBSlave Address (0x16) - SMB CMD 0x78 receiving 32 bytes of data - SMB CMD 0x79 receiving 32 bytes of data Overwrite offset 45 of received data with 8.7 V: * Update offset 45 of second block with 0x21fc (=8700 decimal) Write the complete subclass back to the bq20z70: * Write Subclass ID - SMB Slave Address (0x16) - SMB CMD 0x77 with 0x0050 as data * Write Subclass 78 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 1st Level Safety Class - SMB Slave Address (0x17) - SMB CMD 0x78 with 32 bytes of data - SMB CMD 0x79 with 32 bytes of data Alternatively, only the required block rather than the full subclass can be accessed. Read required block of Gas Gauging-IT Cfg subclass (SubclassID = 80) into RAM: * Write Subclass ID - SMB Slave Address (0x17) - SMB CMD 0x77 with 0x0050 as data (=80 decimal) * Read Subclass (2nd block is needed as its offset 45) - SMB Slave Address (0x16) - SMB CMD 0x79 receiving 32 bytes of data Overwrite offset (45 - 32 = 13) of received data with 8.7 V: * Update offset 45 with 0x21fc (= 8700 decimal) Write the updated block back to the bq20z70: * Write Subclass ID - SMB Slave Address (0x17) SMB CMD 0x77 with 0x0050 as data * Write Subclass - SMB Slave Address (0x17) - SMB CMD 0x79 with 32 bytes of data C.2 1st Level Safety Class C.2.1 Voltage (Subclass 0) C.2.1.1 COV Threshold (Offset 0) The bq20z70 sets the [COV] flag in SafefyStatus if any CellVoltage4..1 is equal to or higher than the COV Threshold for a period of 2s. Table C-1. COV Threshold Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 0 Voltage 0 COV Threshold unsigned integer 2 3700 5000 4300 mV Related Variables: * DF:1st Level Safety:Voltage(0):COV Recovery(3) * SBS:Charging Current(0x14) * SBS:Charging Voltage(0x15) * SBS:Battery Status(0x16)[TCA] * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:SafetyStatus(0x51)[COV] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 79 www.ti.com 1st Level Safety Class C.2.1.2 COV Recovery (Offset 3) The bq20z70 recovers from cell over voltage condition, if all cell voltages are equal to or lower than the COV Recovery threshold level. On recovery the ChargingCurrent and ChargingVoltage is set to appropriate value by charging algorithm, [TCA] is cleared and the [COV] in SafetyStatus is reset. Table C-2. COV Recovery Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 0 Voltage 3 COV Recovery unsigned integer 2 0 4400 3900 mV Related Variables: * DF:1st Level Safety:Voltage(0):COV Threshold(0) * SBS:BatteryStatus(0x16)[TCA] * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:SafetyStatus(0x51)[COV] C.2.1.3 CUV Threshold (Offset 12) The bq20z70 sets the [CUV] SafetyStatus if any CellVoltage4..1 is equal to or lower than the CUV Threshold for a period of 2s. Table C-3. CUV Threshold Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 0 Voltage 12 CUV Threshold unsigned integer 2 0 3500 2200 mV Related Variables: * DF:1st Level Safety:Voltage(0):CUV Recovery(15) * DF:Charge Control:Pre-Charge Cfg(33):Pre-Charge Current(0) * SBS:Charging Current(0x14) * SBS:BatteryStatus(0x16)[TDA],[FD] * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:SafetyStatus(0x51)[CUV] * SBS:OperationStatus(0x54)[XDSG] C.2.1.4 CUV Recovery (Offset 15) The bq20z70 recovers from cell under voltage condition, if all CellVoltage4..1 are equal to or higher than the CUV Recovery threshold. On recovery the ChargingCurrent and ChargingVoltage are set to appropriate value by charging algorithm, the [TDA] flag is reset, the [CUV] in SafetyStatus is reset and the [XDSG] flag in OperationStatus is reset. 80 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 1st Level Safety Class Table C-4. CUV Recovery Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 0 Voltage 15 CUV Recovery unsigned integer 2 0 3600 3000 mV Related Variables: * DF:1st Level Safety:Voltage(0):CUV Threshold(12) * SBS:Charging Current(0x14) * SBS:Charging Voltage(0x15) * SBS:BatteryStatus(0x16)[TDA],[FD] * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:SafetyStatus(0x51)[CUV] * SBS:OperationStatus(0x54)[XDSG] C.2.2 Current (Subclass 1) C.2.2.1 OC (1st Tier) Chg (Offset 0) The bq20z70 sets the [OCC] SafetyStatus if charge Current is equal to or higher than the OC (1st Tier) Chg threshold for a period of 2s. In overcurrent while charging condition, the CHG FET is turned off, the ChargeCurrent and ChargeVoltage is set to 0, the [TCA] is set and the [OCC] in SafetyStatus is set. The bq20z70 recovers from over current charge condition in non removable battery mode, if the AverageCurrent is equal to or lower than 100mA for the length of Current Recovery Time. The bq20z70 recovers in removable battery mode by removing and reinserting the battery pack. On recovery the ChargingCurrent and ChargingVoltage are set to appropriate value per charging algorithm, [TCA] is reset and the [OCC] in SafetyStatus is reset. Table C-5. OC (1st Tier) Chg Subclass Subclass ID Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 1 0 OC (1st Tier) Charge unsigned integer 2 20000 6000 mA Current 0 Related Variables: * DF:1st Level Safety:Current Recovery Time(16) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:Charging Current(0x14) * SBS:Charging Voltage(0x15) * SBS:BatteryStatus(0x16)[TCA] * SBS:SafetyStatus(0x51)[OCC] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 81 www.ti.com 1st Level Safety Class C.2.2.2 OC (1st Tier) Dsg (Offset 5) The bq20z70 sets the [OCD] SafetyStatus if the discharge Current is equal to or higher than the OC (1st Tier) Dsg threshold for a period of 2s. In overcurrent discharge condition, the DSG FET is turned off, the ChargeCurrent is set to Pre-charge Current, the [TCA] is set, the [FD] flag is set, the [OCD] in SafetyStatus is set and the [XDSG] is set. The bq20z70 recovers from over current discharge condition in non removable battery mode, if the AverageCurrent is equal to or lower than 100mA current level for the length of Current Recovery Time. On recovery the ChargingCurrent and ChargingVoltage is set to appropriate value per charging algorithm, [TCA] is reset, the [OCD] SafetyStatus is reset and the [XDSG] is reset Table C-6. OC (1st Tier) Dsg Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 1 Current 5 OC (1st Tier) Dsg unsigned integer 2 0 20000 6000 mA Related Variables: * DF:Charge Control:Pre-Charge Cfg(33):Pre-Charge Current(0) * DF:1st Level Safety:Current Recovery Time(16) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[TDA] * SBS:OperationStatus(0x54)[XDSG] C.2.2.3 Current Recovery Time (Offset 16) The Current Recovery Time sets the minimum time period where the AverageCurrent need to be below over current charge/discharge recovery threshold to recover from over current charge/discharge condition. Table C-7. Current Recovery Time Subclass Subclass ID Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 1 16 Current Recovery Time unsigned integer 1 0 60 8 Sec Current Related Variables: * SBS:AverageCurrent(0x0b) C.2.2.4 AFE OC Dsg (Offset 17) The AFE OC Dsg threshold sets the OLV register of bq29330 AFE device. See overload threshold register of bq29330 datasheet for more details and appropriate values to use. Table C-8. AFE OC Dsg 82 Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 1 Current 17 AFE OC Dsg hex 1 0 0x1F 0x12 Data Flash Unit SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 1st Level Safety Class bit 7 Low Byte RSVD bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 RSVD RSVD OLV4 OLV3 OLV2 OLV1 OLV0 LEGEND: RSVD = Reserved and must be programmed to 0 Figure C-1. OLV Register OLV4, OLV3, OLV2, OLV1, OLV0 -- Sets the overload voltage threshold of bq29330 0x00 - 0x1f = sets the voltage threshold between 50mV and 205mV in 5mV steps. Related Variables: * DF:1st Level Safety:Current(1):AFE OC Dsg Time(18) C.2.2.5 AFE OC Dsg Time (Offset 18) The AFE OC Discharge Time is programmed into the OLT register of bq29330 AFE device. If an overcurrent discharge condition is reported by bq29330, ChargingCurrent is set to 0, [TDA] in BatteryStatus is set and [AOCD] in SafetyStatus is set. The bq20z70 recovers from over current discharge condition in non removable battery mode, if the AverageCurrent is equal to or lower than the (-)100mA current level for the length of Current Recovery Time. On recovery the charging current and voltage is set to appropriate value per charging algorithm, terminate discharge alarm is reset, the [AOCD] in SafetyStatus is reset and the operation status discharge fault is reset Table C-9. AFE OC Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 1 Current 18 AFE OC Dsg Time hex 1 0 0x0f 0x0f Unit OLT3, OLT2, OLT1, OLT0 -- Sets the overload voltage delay of bq29330 0x00 - 0x0f = sets the overvoltage trip delay between 1ms - 31ms in 1ms steps Related Variables: * DF:1st Level Safety:Current(1):AFE OC Dsg(17) * DF:1st Level Safety:Current Recovery Time(16) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:AverageCurrent(0x0b) * SBS:ChargingCurrent(0x14) * SBS:BatteryStatus(0x16)[TDA] * SBS:SafetyStatus(0x51)[AOCD] C.2.2.6 AFE SC Chg Cfg (Offset 21) The AFE SC Charge Cfg is programmed into the SCC register of bq29330 AFE device. AFE SC Charge Cfg sets the short circuit charging voltage threshold and the short circuit in charging delay of the bq29330. If bq20z70 identifies short circuit situation from bq29330, ChargingCurrent and ChargingVoltage are set to 0, [TCA] in BatteryStatus is set and the [SCC] in SafetyStatus is set. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 83 www.ti.com 1st Level Safety Class The bq20z70 recovers from short circuit charge condition in non removable battery mode, if AverageCurrent is equal to or lower than the 5mA for the length of Current Recovery Time. On recovery the ChargingCurrent and ChargingVoltage is set to appropriate value per charging algorithm, , [TCA] in BatteryStatus is reset, the [SCC] in SafetyStatus is reset. Table C-10. AFE SC Chg Cfg Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 1 Current 21 AFE SC Chg Cfg hex 1 0 0xff 0x77 bit 7 Low Byte SCCT3 Unit bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 SCCT2 SCCT1 SCCT0 SCCV3 SCCV2 SCCV1 SCCV0 Figure C-2. SCC Register SCCT3, SCCT2, SCCT1, SCCT0 -- Sets the short circuit delay in charging of bq29330 0x00 - 0x0f = sets the short circuit in charging delay between 0s - 915s in 61s steps SCCV3, SCCV2, SCCV1, SCCV0 -- Sets the short circuit voltage threshold in charging of bq29330 0x00 - 0x0f = sets the short circuit voltage threshold between 0.1V and 0.475V in 25mV steps Related Variables: * DF:1st Level Safety:Current Recovery Time(16) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:AverageCurrent(0x0b) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[TCA] * SBS:SafetyStatus(0x51)[SCC] C.2.2.7 AFE SC Dsg Cfg (Offset 22) The AFE SC Dsg Cfg is programmed into the SCD register of bq29330 AFE device. The AFE SC Dsg Cfg sets the short circuit discharging voltage threshold and the short circuit in discharging delay of the bq29330. If bq20z70 identifies discharge short circuit situation from bq29330, ChargingCurrent and ChargingVoltage are set to 0, [TDA] in BatteryStatus is set, [SCD] in SafetyStatus is set and [XDSG] in OperationStatus is set. The bq20z70 recovers from short circuit discharge condition in non removable battery mode, if AverageCurrent is equal to or greater than the (-)5mA for the length of Current Recovery Time. On recovery the ChargingCurrent and ChargingVoltage is set to appropriate value per charging algorithm, [TDA], in BatteryStatus is reset, [SCD] in SafetyStatus is reset and the [XDSG] is reset Table C-11. AFE SC Dsg Cfg 84 Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 1 Current 22 AFE SC Dsg Cfg hex 1 0 0xff 0x77 Data Flash Unit SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 1st Level Safety Class bit 7 Low Byte SCDT3 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 SCDT2 SCDT1 SCDT0 SCDV3 SCDV2 SCDV1 SCDV0 Figure C-3. SCD Register SCDT3, SCDT2, SCDT1, SCDT0 -- Sets the short circuit delay in discharging of bq29330 0x00 - 0x0f = sets the short circuit in discharging delay between 0s - 915s in 61s steps SCDV3, SCDV2, SCDV1, SCDV0 -- Sets the short circuit voltage threshold in discharging of bq29330 0x00 - 0x0f = sets the short circuit voltage threshold between 0.1V and 0.475V in 25mV steps Related Variables: * DF:1st Level Safety:Current Recovery Time(16) * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] * SBS:AverageCurrent(0x0b) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[TDA] * SBS:SafetyStatus(0x51)[SCD] * SBS:OperationStatus(0x54)[XDSG] C.2.3 Temperature (Subclass 2) C.2.3.1 Over Temp Chg (Offset 0) The bq20z70 sets the [OTC] in SafetyStatus if pack Temperature is equal to or higher than the Over Temp Chg threshold for a period of 2s. In charging overtemperature condition, the ChargingVoltage and ChargingCurrent is set to 0, the [OTA] in BatteryStatus is set, [TCA] is set, the [OTC] in SafetyStatus is set. If [OTFET] bit is enabled, CHG FET also turns off. Table C-12. Over Temp Chg Subclass ID Subclass Name Offset Name Format Size in Min Bytes Value Max Value Default Unit Value 2 0 Over Temp Chg unsigned integer 2 1200 550 Temperature 0 0.1C Related Variables: * DF:1st Level Safety:Temperature(2):OT Chg Recovery (3) * DF:Configuration:Registers(64):Operation Cfg B(2)[OTFET] * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[OTA],[TCA] * SBS:SafetyStatus(0x51)[OTC] * SBS:Temperature(0x08) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 85 www.ti.com 1st Level Safety Class C.2.3.2 OT Chg Recovery (Offset 3) The bq20z70 recovers from over temperature charge condition, if the Temperature is equal to or lower than the OT Chg Recovery level. On recovery the CHG FET returns to normal operating state, the ChargingCurrent and ChargingVoltage are set to appropriate value per charging algorithm, the [OTA] is reset and the [OTC] in SafetyStatus is reset. Table C-13. OT Chg Recovery Subclass ID Subclass Name Offset Name Format Size in Bytes 2 Temperature 3 OT Chg Recovery unsigned integer 2 Min Value Max Value Default Value Unit 0 1200 500 0.1C Related Variables: * DF:1st Level Safety:Temperature(2):Over Temp Chg (0) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[OTA] * SBS:SafetyStatus(0x51)[OTC] C.2.3.3 Over Temp Dsg (Offset 5) The bq20z70 sets the [OTD] in SafetyStatus if Temperature function value is equal to or higher than Over Temp Dsg threshold for a period of 2s. In discharging overtemperature condition, the ChargingCurrent is set to 0, the [OTA] battery status is set, the [OTD] SafetyStatus is set. If [OTFET] bit is enabled, DSG FET also turns off and [XDSG] in OperationStatus is set. Table C-14. Over Temp Dsg Subclass ID Subclass Name Offset Name Format Size in Bytes 2 Temperature 5 Over Temp Dsg unsigned integer 2 Min Value Max Value Default Value Unit 0 1200 600 0.1C Related Variables: * DF:Configuration:Registers(64):Operation Cfg B(2)[OTFET] * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[OTA] * SBS:SafetyStatus(0x51)[OTD] * SBS:OperationStatus(0x54)[XDSG] C.2.3.4 OT Dsg Recovery (Offset 8) The bq20z70 recovers from over temperature discharge condition, if the Temperature function reports a temperature equal to or lower than the OT Dsg Recovery level. On recovery the DSG FET returns to normal operating state, the ChargingCurrent and ChargingVoltage are set to appropriate value per charging algorithm, the [OTA] is reset, the [OTD] SafetyStatus is reset and the [XDSG] in OperationStatus is reset. 86 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 2nd Level Safety Table C-15. OT Dsg Recovery Subclass ID Subclass Name Offset Name Format Size in Bytes 2 Temperature 8 OT Dsg Recovery unsigned integer 2 Min Value Max Value Default Value Unit 0 1200 550 0.1C Related Variables: * DF:1st Level Safety:Temperature(2):Over Temp Chg (0) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[OTA] * SBS:SafetyStatus(0x51)[OTC] * SBS:OperationStatus(0x54)[XDSG] C.3 2nd Level Safety C.3.1 Voltage (Subclass 16) C.3.1.1 SOV Threshold (Offset 0) The bq20z70 sets the [SOV] flag in PF Status if the Voltage function reports a value equal to or higher than the SOV Threshold. Table C-16. SOV Threshold Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 16 Voltage 0 SOV Threshold unsigned integer 2 0 20000 18000 mV Related Variables: * DF:2nd Level Safety:Voltage(16):SOV Time(2) * SBS:Voltage(0x09) * SBS:PFStatus(0x53)[SOV] C.3.1.2 SOV Time (Offset 2) If the Voltage exceeds[SOV] threshold for a time period of SOV Time limit, the bq20z70 goes into safety over voltage condition, [SOV] in PF Status is set and if [XSOV] bit in Permanent Fail Cfg is set, the SAFE pin is driven high. This function is disabled if SOV Time is set to 0. Table C-17. SOV Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 16 Voltage 2 SOV Time unsigned integer 1 0 30 0 Sec Related Variables: * DF:2nd Level Safety:Voltage(16):SOV Threshold(0) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XSOV] * SBS:Voltage(0x09) * SBS:PFStatus(0x53)[SOV] SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 87 www.ti.com 2nd Level Safety C.3.1.3 Cell Imbalance Current (Offset 3) The battery pack Current must be below the Cell Imbalance Current limit for Cell Imbalance Time before bq20z70 starts detecting cell imbalance. Table C-18. Cell Imbalance Current Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 16 Voltage 3 Cell Imbalance Current unsigned integer 1 0 200 5 mA Related Variables: * DF:2nd Level Safety:Voltage(16):Cell Imbalance Fail Voltage(4) * DF:2nd Level Safety:Voltage(16):Cell Imbalance Time(6) * DF:2nd Level Safety:Voltage(16):Battery Rest Time(7) * SBS:Current(0x0a) C.3.1.4 Cell Imbalance Fail Voltage (Offset 4) If the Current goes below Cell Imbalance Current for Battery Rest Time, the bq20z70 starts cell imbalance measurements. The bq20z70 sets the [CIM] in PFStatus if the bq20z70 measures a difference between any CellVoltage4..1 are equal to or higher than the Cell Imbalance Fail Voltage threshold for a period of Cell Imbalance Time. Table C-19. Cell Imbalance Fail Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 16 Voltage 4 Cell Imbalance Fail Voltage unsigned integer 2 0 5000 1000 mV Related Variables: * DF:2nd Level Safety:Voltage(16):Cell Imbalance Current(3) * DF:2nd Level Safety:Voltage(16):Cell Imbalance Time(6) * DF:2nd Level Safety:Voltage(16):Battery Rest Time(7) * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:PFStatus(0x53)[CIM] C.3.1.5 Cell Imbalance Time (Offset 6) If the measured voltage difference between cells is higher than the Cell Imbalance Fail Voltage threshold for a period of Cell Imbalance Time limit, bq20z70 goes into cell imbalance condition, [CIM] in PF Status is set and if [XCIM] in permanent fail configuration is set, the SAFE pin is also driven high. This function is disabled if Cell Imbalance Time is set to 0. Table C-20. Cell Imbalance Time 88 Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 16 Voltage 6 Cell Imbalance Time unsigned integer 1 0 30 0 Sec Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 2nd Level Safety Related Variables: * DF:2nd Level Safety:Voltage(16):Cell Imbalance Current(3) * DF:2nd Level Safety:Voltage(16):Cell Imbalance Fail Voltage(4) * DF:2nd Level Safety:Voltage(16):Battery Rest Time(7) * DF:1st Level Safety:Temperature(2):Over Temp Chg (0) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XSOV] * SBS:PFStatus(0x53)[CIM] C.3.1.6 Battery Rest Time (Offset 7) The battery Current must be below Cell Imbalance Current limit for at least Battery Rest Time period before bq20z70 starts detecting cell imbalance. Set to 0 to disable cell imbalance detection. Table C-21. Battery Rest Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 16 Voltage 7 Battery Rest Time unsigned integer 2 0 65535 1800 Sec Related Variables: * DF:2nd Level Safety:Voltage(16):Cell Imbalance Current(3) * DF:2nd Level Safety:Voltage(16):Cell Imbalance Fail Voltage(4) * DF:2nd Level Safety:Voltage(16):Cell Imbalance Time(6) * SBS:Current(0x0a) C.3.1.7 PFIN Detect Time (Offset 9) If PFIN pin logic low for a period of PFIN detect time, [PFIN] in PFStatus is set. If [XPFIN] in permanent fail configuration is set, the SAFE pin is also driven high. This function is disabled if PFIN Detect Time is set to 0. Table C-22. PFIN Detect Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 16 Voltage 9 PFIN Detect Time unsigned integer 1 0 30 0 Sec Related Variables: * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XPFIN] * SBS:PFStatus(0x53)[PFIN] C.3.2 Current (Subclass 17) C.3.2.1 SOC Chg (Offset 0) The bq20z70 sets the [SOCC] in PF Status if Current is equal to or higher than the SOC Chg threshold for a period of SOC Chg Time. Table C-23. SOC Chg Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 17 Current 0 SOC Chg unsigned integer 2 0 30000 10000 mA SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 89 www.ti.com 2nd Level Safety Related Variables: * DF:2nd Level Safety:Current(17):SOC Chg Time(2) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XSOCC] * SBS:Current(0x0a) * SBS:PFStatus(0x53)[SOCC] C.3.2.2 SOC Chg Time (Offset 2) If the Current is equal to or higher than the SOC Chg threshold, [SOCC] in PFStatus is set and if [XSOCC] in permanent fail configuration is set, the SAFE pin is driven high. This function is disabled if SOC Chg Time is set to 0. Table C-24. SOC Chg Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 17 Current 2 SOC Chg Time unsigned integer 1 0 30 0 Sec Related Variables: * DF:2nd Level Safety:Voltage(16):SOV Threshold(0) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XSOCC] * SBS:Current(0x0a) * SBS:PFStatus(0x53)[SOCC] C.3.2.3 SOC Dsg (Offset 3) The bq20z70 sets the [SOCD] PF Status if discharge Current is equal to or higher than the (-)SOC Dsg threshold for a period of SOC Dsg Time. Table C-25. SOC Dsg Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 17 Current 3 SOC Dsg unsigned integer 2 0 30000 10000 mA Related Variables: * DF:2nd Level Safety:Current(17):SOC Chg Time(2) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XSOCC] * SBS:Current(0x0a) * SBS:PFStatus(0x53)[SOCD] C.3.2.4 SOC Dsg Time (Offset 5) If the discharge Current is equal to or higher than the (-)SOC Dsg threshold for a period of SOC Dsg Time, [SOCD] in PF Status is set and if [XSOCD] bit in permanent fail configuration is set, the SAFE pin is driven high. This function is disabled if SOCD Dsg Time is set to 0. Table C-26. SOC Dsg Time 90 Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 17 Current 5 SOC Dsg Time unsigned integer 1 0 30 0 Sec Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com 2nd Level Safety Related Variables: * DF:2nd Level Safety:Voltage(16):SOC Dsg(3) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XSOCD] * SBS:Current(0x0a) * SBS:PFStatus(0x53)[SOCD] C.3.3 Temperature (Subclass 18) C.3.3.1 SOT Chg (Offset 0) The bq20z70 sets the [SOTC] PF Status if Temperature is equal to or higher than the SOT Chg threshold during charging ( [DSG] = 0) for a period of SOT Chg Time. Table C-27. SOT Chg Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 18 Temperature 0 SOT Chg unsigned integer 2 0 1200 650 0.1C Related Variables: * DF:2nd Level Safety:Temperature(18):SOT Chg Time(2) * SBS:Temperature(0x08) * SBS:BatteryStatus(0x16)[DSG] * SBS:PFStatus(0x53)[SOTC] C.3.3.2 SOT Chg Time (Offset 2) If the Temperature is equal to or higher than the SOT Chg threshold during charging for a time period of safety over temperature charging time, bq20z70 goes into SOTC condition, [SOTC] in PF Status and if [XSOTC] in permanent fail configuration is set, the SAFE pin is driven high. This function is disabled if SOT Chg Time is set to 0. Table C-28. SOT Chg Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 18 Temperature 2 SOT Chg Time unsigned integer 1 0 30 0 Sec Related Variables: * DF:2nd Level Safety:Temperature(18):SOT Chg(0) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XSOTC] * SBS:Temperature(0x08) * SBS:PFStatus(0x53)[SOTC] C.3.3.3 SOT Dsg (Offset 3) The bq20z70 sets the [SOTD] PF Status if Temperature is equal to or higher than the SOT Dsg threshold during discharging ( [DSG] = 1) for a period of SOT Dsg Time. Table C-29. SOT Dsg Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 18 Temperature 3 SOT Dsg unsigned integer 2 0 1200 750 0.1C SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 91 www.ti.com 2nd Level Safety Related Variables: * DF:2nd Level Safety:Temperature(18):SOT Dsg Time(5) * SBS:Temperature(0x08) * SBS:BatteryStatus(0x16)[DSG] * SBS:PFStatus(0x53)[SOTD] C.3.3.4 SOT Dsg Time (Offset 5) If Temperature is equal to or higher than the SOT Dsg threshold during discharging ( [DSG] = 1) for a period of SOT Dsg Time, bq20z70 goes into [SOTD] condition, [SOTD] in PF Status is set and if [XSOTD] in permanent fail configuration is set, the SAFE pin is driven high. This function is disabled if SOT Dsg Time is set to 0. Table C-30. SOT Dsg Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 18 Temperature 5 SOT Dsg Time unsigned integer 1 0 30 0 Sec Related Variables: * DF:2nd Level Safety:Temperature(18):SOT Dsg(3) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XSOTD] * SBS:Temperature(0x08) * SBS:PFStatus(0x53)[SOTD] C.3.4 FET Verification (Subclass 19) C.3.4.1 FET Fail Time (Offset 2) If bq20z70 tries to turn off CHG FET and charge Current is equal to or higher than 50mA for a time period of FET Fail Time the bq20z70 goes into [CFETF] condition, [CFETF] in PF Status is and if [XCFETF] in permanent fail configuration is set, the SAFE pin is driven high. This function is disabled if FET Fail Time is set to 0. If bq20z70 tries to turn off DSG FET and the discharge Current is equal to or lower than the -50mA for a time period of FET fail time, bq20z70 goes into [DFETF] condition, [DFETF] in PF Status is set and if [XDFETF] in permanent fail configuration is set, the SAFE pin is driven high. This function is disabled if FET Fail Time is set to 0. Table C-31. FET Fail Time Subclass ID Subclass Name Offset 19 FET Verification 2 Name Format Size in Bytes Min Value Max Value Default Value Unit FET Fail Time unsigned integer 1 0 30 0 Sec Related Variables: * DF:2nd Level Safety:FET Verification(19):FET Fail Time( 2) * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XCFETF] * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XDFETF] * SBS:Current(0x0a) * SBS:PFStatus(0x53)[CFETF],[DFETF] 92 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Charge Control C.3.5 AFE Verification (Subclass 20) C.3.5.1 AFE Fail Limit (Offset 1) The bq20z70 continuously validates its read and write communications with the bq29330. If either a read or write verify fails, an internal AFE_Fail_Counter is incremented. If the AFE_Fail_Counter reaches AFE Fail Limit, the bq20z70 reports a [AFE_C] permanent failure and if [XAFE_C] in permanent fail configuration is set, the SAFE pin is driven high. If the AFE Fail Limit is set to 0, this feature is disabled. Table C-32. AFE Fail Limit Subclass ID Subclass Name Offset 20 FET Verification 1 Name Format Size in Bytes Min Value Max Value Default Value AFE Fail Limit unsigned integer 1 0 500 10 Unit Related Variables: * DF:Configuration:Registers(Subclass 64):Permanent Fail Cfg(4)[XAFE_C] * SBS:AFEData(0x45) * SBS:PFStatus(0x53)[AFE_C] C.4 Charge Control C.4.1 Charge Inhibit Cfg (Subclass 32) C.4.1.1 Chg Inhibit Temp Low (Offset 0) If [DSG] flag is set and the Temperature is below the CHG Inhibit Temp Low threshold, ChargingCurrent and ChargingVoltage are set to 0. If the [CHGIN] bit is also set, CHG FET and ZVCHG FET (if used) are switched off and [XCHG] in ChargingStatus is set during charge inhibit mode. If in charge inhibit mode the Temperature rises above Chg Inhibit Temp Low + 5C, charging is allowed to be resumed and [XCHG] charging status is cleared. If [NR] flag is cleared, fault condition can be cleared by removing and reinserting the battery pack. Table C-33. Chg Inhibit Temp Low Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 32 Charge Inhibit Cfg 0 Chg Inhibit Temp Low signed integer 2 -400 1200 0 0.1C Related Variables: * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp High(2) * DF:Configuration:Registers(64):Operation Cfg B(2)[CHGIN] * SBS:Temperature(0x08) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[DSG] * SBS:ChargingStatus(0x55)[XCHG] C.4.1.2 Chg Inhibit Temp High (Offset 2) If [DSG] flag is set and the Temperature is above the CHG Inhibit Temp High threshold, ChargingCurrent and ChargingVoltage are set to 0. If the [CHGIN] bit is also set, CHG FET and ZVCHG FET (if used) are switched off and [XCHG] charging status is set in charge inhibit mode. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 93 www.ti.com Charge Control If in charge inhibit mode the Temperature falls below Chg Inhibit Temp High - 5C, charging is allowed to be resumed and [XCHG] charging status is cleared. If [NR] flag is cleared, fault condition can be cleared by removing and reinserting the battery pack. Table C-34. Chg Inhibit Temp High Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 32 Charge Inhibit Cfg 2 Chg Inhibit Temp High signed integer 2 -400 1200 450 0.1C Related Variables: * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp Low(0) * DF:Configuration:Registers(64):Operation Cfg B(2)[CHGIN] * SBS:Temperature(0x08) * SBS:ChargingCurrent(0x14) * SBS:ChargingVoltage(0x15) * SBS:BatteryStatus(0x16)[DSG] * SBS:ChargingStatus(0x55)[XCHG] C.4.2 Pre-Charge Cfg (Subclass 33) C.4.2.1 Pre-chg Current (Offset 0) The bq20z70 sets the ChargingCurrent to the Pre-charge Current value, when in pre-charge mode. Table C-35. Pre-chg Current Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 33 Pre-Chg Cfg 0 Pre-chg Current unsigned integer 2 0 2000 250 mA Related Variables: * SBS:ChargingCurrent(0x14) C.4.2.2 Pre-chg Temp (Offset 2) If the battery Temperature drops below the Pre-chg Temp, bq20z70 enters pre-charge mode and [PCHG] flag in ChargingStatus is set. bq20z70 leaves pre-charge mode if Temperature rises above Pre-chg Temp + 5C and all CellVoltage4..1 are above Recovery Voltage level. On recovery [PCHG] status is cleared. Table C-36. Pre-chg Temp Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 33 Pre-Chg Cfg 2 Pre-chg Temp signed integer 2 -400 1200 120 0.1C Related Variables: * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp Low(0) * DF:Pre-Charge Cfg(33):Recovery Voltage(6) * SBS:Temperature(0x08) * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) 94 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Charge Control * * SBS:CellVoltage1(0x3f) SBS:ChargingStatus(0x55)[PCHG] C.4.2.3 Pre-chg Voltage (Offset 4) The bq20z70 enters pre-charge mode and sets the [PCHG] in ChargingStatus if any CellVoltage4..1 drops below the Pre-chg Voltage threshold. Table C-37. Pre-chg Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 33 Pre-Chg Cfg 4 Pre-chg Voltage unsigned integer 2 0 20000 3000 mV Related Variables: * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:ChargingStatus(0x55)[PCHG] C.4.2.4 Recovery Voltage (Offset 6) The bq20z70 enters fast charge mode from pre charge mode and sets the [FCHG] in ChargingStatus if all CellVoltage4..1 are equal to or higher than the Recovery Voltage threshold and battery Temperature is above Pre-chg Temp + 5C. Table C-38. Recovery Voltage Subclass ID Subclass Name Offset Name Format 33 Pre-Chg Cfg 6 Recovery Voltage unsigned integer Size in Bytes Min Value Max Value Default Value Unit 2 0 20000 3100 mV Related Variables: * DF:Pre-Charge Cfg(33):Pre-chg Temp(2) * SBS:Temperature(0x08) * SBS:CellVoltage4(0x3c) * SBS:CellVoltage3(0x3d) * SBS:CellVoltage2(0x3e) * SBS:CellVoltage1(0x3f) * SBS:ChargingStatus(0x55)[FCHG] C.4.3 Fast Charge Cfg (Subclass 34) C.4.3.1 Fast Charge Current (Offset 0) The bq20z70 sets the ChargingCurrent to the Fast Charge Current value, when in fast charge mode. Table C-39. Fast Charge Current Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 34 Fast Charge Cfg 0 Fast Charge Current unsigned integer 2 0 10000 4000 mA SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 95 www.ti.com Charge Control Related Variables: * SBS:ChargingCurrent(0x14) * SBS:ChargingStatus(0x55)[FCHG] C.4.3.2 Charging Voltage (Offset 2) The bq20z70 sets the ChargingVoltage to this value in fast charge mode. Table C-40. Charging Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 34 Fast Charge Cfg 2 Charging Voltage unsigned integer 2 0 20000 16800 mV Related Variables: * SBS:ChargingVoltage(0x15) * SBS:ChargingStatus(0x55)[FCHG] C.4.3.3 Suspend Low Temp (Offset 6) If the battery pack Temperature drops below Suspend Low Temp, the AverageCurrent is above Chg Current Threshold and bq20z70 is in charge mode ( [DSG] = 0), the bq20z70 suspends charging. On suspend ChargingCurrent is set to 0 and the [CHGSUSP] flag in ChargingStatus is set. The CHG FET and ZVCHG FET (if used) are also disabled if [CHGSUSP] bit is set. The bq20z70 returns to normal charging and clears [CHGSUSP], if Temperature rises above Chg Inhibit Temp Low + 5C. Table C-41. Suspend Low Temp Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 34 Fast Charge Cfg 6 Suspend Low Temp signed integer 2 -400 1200 -50 0.1C Related Variables: * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp Low(0) * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp High(2) * DF:Charge Control:Fast Charge Cfg(34):Suspend Low Temp(6) * DF:Configuration:Registers(64):Operation Cfg B(2)[CHGSUSP] * DF:Gas Gauging:Current Thresholds(81):Chg Current Threshold(2) * SBS:Temperature(0x08) * SBS:AverageCurrrent(0x0b) * SBS:BatteryStatus(0x16) * SBS:ChargingStatus(0x55)[CHGSUSP] C.4.3.4 Suspend High Temp (Offset 8) If battery pack Temperature rises above Suspend Temperature High, the AverageCurrent is above the Chg Current Threshold and the bq20z70 is in charge mode ( [DSG] = 0), the bq20z70 suspends charging. On suspend ChargingCurrent is set to 0 and the [CHGSUSP] flag in ChargingStatus is set. The CHG FET and ZVCHG FET (if used) are also disabled if [CHGSUSP] bit is set. The bq20z70 returns to normal charging and clears [CHGSUSP], if temperature drops below Chg Inhibit Temp High - 5C. 96 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Charge Control Table C-42. Suspend High Temp Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 34 Fast Charge Cfg 8 Suspend Low Temp signed integer 2 -400 1200 550 0.1C Related Variables: * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp Low(0) * DF:Charge Control:Charge Inhibit Cfg(32):Chg Inhibit Temp High(2) * DF:Charge Control:Fast Charge Cfg(34):Suspend High Temp(8) * DF:Gas Gauging:Current Thresholds(81):Chg Current Threshold(2) * SBS:Temperature(0x08) * SBS:AverageCurrrent(0x0b) * SBS:BatteryStatus(0x16) * SBS:ChargingStatus(0x55)[CHGSUSP] C.4.4 Termination Cfg (Subclass 36) C.4.4.1 Taper Current (Offset 2) If battery Current falls below Taper Current for 2 consecutive windows of 40s each during charging and Voltage is equal or higher than Charging Voltage - Taper Voltage, bq20z70 recognizes valid primary charge termination. Table C-43. Taper Current Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 36 Termination Cfg Taper Current unsigned integer 2 0 1000 250 mA 2 Related Variables: * SBS:Current(0x0a) C.4.4.2 Taper Voltage (Offset 6) For valid primary charge termination pack Voltage must equal to or higher than Charging Voltage Taper Voltage. Table C-44. Taper Voltage Subclass ID Subclass Name Offset 36 Termination Cfg 6 Name Format Size in Bytes Min Value Max Value Default Value Unit Taper Voltage unsigned integer 2 0 1000 300 mV Related Variables: * DF:Charge Control:Fast Charge Cfg(34):Charging Voltage(8) * SBS:Voltage(0x09) C.4.4.3 TCA Clear % (Offset 10) If set between 0% and 100%, [TCA] battery status is cleared, if RelativeStateOfCharge is below TCA Clear %. Set to -1% to disable this function. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 97 www.ti.com Charge Control Table C-45. TCA Clear % Subclass ID Subclass Name Offset Name Format 36 Termination Cfg 10 TCA Clear % signed integer Size in Bytes Min Value Max Value Default Value Unit 1 -1 100 95 % Related Variables: * SBS:RelativeStateOfCharge(0x0d) * SBS:BatteryStatus(0x16)[TCA] C.4.4.4 FC Clear % (Offset 12) If set between 0% and 100%, [FC] battery status is cleared if RelativeStateOfCharge reaches or sinks below FC Clear %. Set to -1% to disable this function. It is recommended not to set FC Clear % to -1%. Table C-46. FC Clear % Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 36 Termination Cfg 12 FC Clear % signed integer 1 -1 100 98 % Related Variables: * DF:Charge Control:Termination Cfg(36):FC Set(10) * SBS:RelativeStateOfCharge(0x0d) * SBS:BatteryStatus(0x16)[FC] C.4.5 Cell Balancing Cfg (Subclass 37) C.4.5.1 Min Cell Deviation (Offset 0) This value defines the conversion factor for calculating cell balancing time per cell in balance time per mAh, before bq20z70 starts balancing cell capacity during charging. If Min Cell Deviation is set to 0, cell balancing is disabled. Table C-47. Min Cell Deviation Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 37 Cell Balancing Cfg 0 Min Cell Deviation unsigned integer 2 0 65535 1750 Sec/mAh Related Variables: * none C.4.6 Charging Faults (Subclass 38) C.4.6.1 Over Charge Capacity (Offset 13) The bq20z70 goes into overcharge error and sets [OC] flag in ChargingStatus if the internal counted remaining capacity exceeds FullChargeCapacity + Over Charge Capacity. The bq20z70 recovers from over charge in non removable battery mode( [NR] = 1), if it is continuously discharged by an amount of 2mAh. 98 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com SBS Configuration Table C-48. Over Charge Capacity Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 38 Charging Faults 13 Over Charge Capacity unsigned integer 2 0 4000 300 mAh Related Variables: * SBS:FullChargeCapacity(0x10) * SBS:ChargingStatus(0x55)[OC] C.5 SBS Configuration C.5.1 Data (Subclass 48) C.5.1.1 Rem Cap Alarm (Offset 0) The default value of RemainingCapacityAlarm is stored in this variable and copied to the SBS value on bq20z70 initialization. Table C-49. Rem Cap Alarm Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 48 Data 0 Rem Cap Alarm unsigned integer 2 0 700 300 mAh Related Variables: * SBS:RemainingCapacityAlarm(0x01) C.5.1.2 Rem Energy Alarm (Offset 2) The default value of RemainingEnergyAlarm is stored in this variable. Table C-50. Rem Time Alarm Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 48 Data 2 Rem Energy Alarm unsigned integer 2 0 1000 432 mWh C.5.1.3 Rem Time Alarm (Offset 4) The default value of RemainingTimeAlarm is stored in this variable and copied to the SBS value on bq20z70 initialization. Table C-51. Rem Time Alarm Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 48 Data 4 Rem Time Alarm unsigned integer 2 0 30 10 min Related Variables: * SBS:RemainingTimeAlarm(0x02) C.5.1.4 Init Battery Mode (Offset 6) The default value of BatteryMode is stored in this variable and copied to the SBS value on bq20z70 initialization. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 99 www.ti.com SBS Configuration Table C-52. Init Battery Mode Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 48 Data 6 Init Battery Mode hex 2 0 0xffff 0x0081 Unit Related Variables: * SBS:BatteryMode(0x03) C.5.1.5 Design Voltage (Offset 8) The default value of DesignVoltage is stored in this variable and copied to the SBS value on bq20z70 initialization. Table C-53. Design Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 48 Data 8 Design Voltage unsigned integer 2 7000 18000 14400 mV Related Variables: * SBS:DesignVoltage(0x19) C.5.1.6 Spec Info (Offset 10) The default value of SpecificationInfo is stored in this variable and copied to the SBS value on bq20z70 initialization. Table C-54. Spec Info Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 48 Data 10 Spec Info hex 2 0x0000 0xffff 0x0031 Unit Related Variables: * SBS:SpecificationInfo(0x1a) C.5.1.7 Manuf Date (Offset 12) The default value of ManufacturerDate is stored in this variable and copied to the SBS value on bq20z70 initialization. Table C-55. Manuf Date Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 48 Data 12 Manuf Date unsigned integer 2 0 65535 0 Day + Mo*32 + (Yr -1980)*512 Related Variables: * SBS:ManufactureDate(0x1b) C.5.1.8 Ser. Num. (Offset 14) The default value of SerialNumber is stored in this variable and copied to the SBS value on bq20z70 initialization. 100 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com SBS Configuration Table C-56. Ser. Num. Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 48 Data 14 Ser. Num. hex 2 0x0000 0xffff 0x0001 Unit Related Variables: * SBS:SerialNumber(0x1c) C.5.1.9 Cycle Count (Offset 16) The default value of CycleCount is stored in this variable and copied to the SBS value on bq20z70 initialization. When SBS value changes this value is also updated. Table C-57. Cycle Count Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 48 Data 16 Cycle Count unsigned integer 2 0 65535 0 Unit Related Variables: * DF:SBS Configuration:Data(48):CC Threshold(18) * SBS:CycleCount(0x17) C.5.1.10 CC Threshold (Offset 18) The cycle count function counts the accumulated discharge of CC Threshold value as one cycle. Table C-58. CC Threshold Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 48 Data 18 CC Threshold signed integer 2 100 32767 4400 mAh Related Variables: * SBS:CycleCount(0x17) C.5.1.11 CF Max Error Limit (Offset 21) If MaxError function value is greater than this limit, CONDITION_FLAG is set. Table C-59. CF Max Error Limit Subclass ID Subclass Name Offset Name Format 48 Data 21 CF Max Error Limit unsigned integer Size in Bytes Min Value Max Value Default Value Unit 1 0 100 100 % Related Variables: * SBS:BatteryMode(0x03)[CONDITION_FLAG] * SBS:MaxError(0x0c) C.5.1.12 Design Capacity (Offset 22) If CAPACITY_MODE is set to 0, the DesignCapacity function reports this value. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 101 www.ti.com SBS Configuration Table C-60. Design Capacity Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 48 Data 22 Design Capacity unsigned integer 2 0 65535 4400 mAh Related Variables: * DF:Gas Gauging:IT Cfg(80):Load Select(0) * SBS:BatteryMode(0x03)[CapM] * SBS:DesignCapacity(0x18) * SBS:StateOfHealth(0x4f) C.5.1.13 Design Energy (Offset 24) If CAPACITY_MODE is set to 1, the DesignCapacity function reports this value. Table C-61. Design Energy Subclass ID Subclass Name Offset Name Format 48 Data 24 Design Energy unsigned integer Size in Bytes Min Value Max Value Default Value Unit 2 0 65535 6336 0.1Wh Related Variables: * DF:Gas Gauging:IT Cfg(80):Load Select(0) * SBS:BatteryMode(0x03)[CapM] * SBS:DesignCapacity(0x18) * SBS:StateOfHealth(0x4f) C.5.1.14 Manuf Name (Offset 26) The ManufacturerName function returns a string stored in this value. The maximum text length is 11 characters. Table C-62. Manuf Name Subclass Subclass ID Name Offset Name Format Size in Bytes 48 26 Manuf Name string 11 + 1 Data Min Value Max Value Default Value Unit Texas Inst. ASCII Related Variables: * SBS:ManufacturerName(0x20) C.5.1.15 Device Name (Offset 38) The DeviceName function returns a string stored in this value. The maximum text length is 7 characters. Table C-63. Device Name Subclass ID Subclass Name Offset Name Format Size in Bytes 48 Data 38 Device Name string 7+1 Min Value Max Value Default Value Unit bq20z70 ASCII Related Variables: * SBS:DeviceName(0x21) 102 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com SBS Configuration C.5.1.16 Device Chemistry (Offset 46) The DeviceChemistry function returns a string stored in this value. The maximum text length is 4 characters. Table C-64. Device Chemistry Subclass ID Subclass Name Offset Name Format Size in Bytes 48 Data 46 Device Chemistry string 4+1 Min Value Max Value Default Value Unit LION ASCII Related Variables: * SBS:DeviceChemistry(0x22) C.5.2 Configuration(Subclass 49) C.5.2.1 TDA Set % (Offset 0) If set between 0% and 100%, bq20z70 sets [TDA] flag in BatteryStatus if the RelativeStateOfCharge reaches or falls below this value. Set to -1% to disable this function. Table C-65. TDA Set % Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 49 Configuration 0 TDA Set % signed integer 1 -1 100 6 % Related Variables: * SBS:RelativeStateOfCharge(0x0d) * SBS:BatteryStatus(0x16)[TDA] C.5.2.2 TDA Clear % (Offset 1) If set between 0% and 100%, bq20z70 clears [TDA] flag in BatteryStatus if the RelativeStateOfCharge reaches or rises above this value. Set to -1% to disable this function. Table C-66. TDA Clear % Subclass ID Subclass Name Offset Name Format 49 Configuration 1 TDA Clear % signed integer Size in Bytes Min Value Max Value Default Value Unit 1 -1 100 8 % Related Variables: * SBS:RelativeStateOfCharge(0x0d) * SBS:BatteryStatus(0x16)[TDA] C.5.2.3 FD Set % (Offset 2) If set between 0% and 100%, bq20z70 sets [FD] flag in BatteryStatus if the RelativeStateOfCharge reaches or falls below this value. Set to -1% to disable this function. Table C-67. FD Set % Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 49 Configuration 2 FD Set % signed integer 1 -1 100 2 % SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 103 www.ti.com SBS Configuration Related Variables: * SBS:RelativeStateOfCharge(0x0d) * SBS:BatteryStatus(0x16)[FD] C.5.2.4 FD Clear % (Offset 3) If set between 0% and 100%, bq20z70 clears [FD]flag in BatteryStatus if the RelativeStateOfCharge reaches or rises above this value. Set to -1% to disable this function. Table C-68. FD Clear % Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 49 Configuration 3 FC Clear % signed integer 1 -1 100 5 % Related Variables: * SBS:RelativeStateOfCharge(0x0d) * SBS:BatteryStatus(0x16)[TDA] C.5.2.5 TDA Set Volt Threshold (Offset 4) bq20z70 sets [TDA] flag in BatteryStatus if Voltage is equal to or lower than this value for a period equal to or greater than TDA Set Volt Time. Table C-69. TDA Set Volt Threshold Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 49 Configuration 4 TDA Set Volt Threshold unsigned integer 2 0 16800 5000 mV Related Variables: * DF:SBS Configuration:Configuration(49):TDA Set Volt Time(6) * SBS:Voltage(0x09) * SBS:BatteryStatus(0x16)[TDA] C.5.2.6 TDA Set Volt Time (Offset 6) The bq20z70 sets [TDA] flag in BatteryStatus if Voltage is equal to or lower than TDA Set Volt Threshold for a period equal to or greater than TDA Set Voltage Time. Set to 0 to disable this feature. Table C-70. TDA Set Volt Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 49 Configuration 6 TDA Set Volt Time unsigned integer 1 0 60 0 Sec Related Variables: * DF:SBS Configuration:Configuration(49):TDA Set Volt Threshold(4) * SBS:Voltage(0x09) * SBS:BatteryStatus(0x16)[TDA] 104 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com System Data C.5.2.7 TDA Clear Volt (Offset 7) bq20z70 clears [TDA] if Voltage is equal to or above than this value. TDA Clear Volt clears [TDA] only if [TDA] is set by TDA Set Volt Threshold. It will not clear [TDA] if [TDA] is set by TDA Set % or any other functions. Table C-71. TDA Clear Volt Subclass Subclass ID Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 49 7 TDA Clear Volt unsigned integer 2 0 16800 5500 mV Configuration Related Variables: * DF:SBS Configuration:Configuration(49):TDA Set Volt Threshold(4) * DF:SBS Configuration:Configuration(49):TDA Set Volt Time(6) * SBS:Voltage(0x09) * SBS:BatteryStatus(0x16)[TDA] C.6 System Data C.6.1 Manufacturer Info (Subclass 58) C.6.1.1 Manuf. Info (Offset 0) The ManufacturerInfo function returns the string stored in this variable. The maximum text length is 8 characters. Table C-72. Manuf. Info Subclass Subclass Name ID Offset Name 58 0 Manuf. Info string Manufacturer Info Format Size in Bytes Min Value Max Value 8+1 12345678 ASCII Default Value Unit Unit Related Variables: * SBS:ManufacturerInfo(0x70) C.7 Configuration C.7.1 Registers (Subclass 64) C.7.1.1 Operation Cfg A (Offset 0) This register enable, disable or configures various features of bq20z70 Table C-73. Operation Cfg A Subclass Subclass ID Name Offset Name Format Size in Bytes Min Value Max Value Default Value 64 0 Operation Cfg A hex 2 0x0000 0x033b 0x033b Configuration SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 105 www.ti.com Configuration High Byte Low Byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 RSVD RSVD RSVD RSVD RSVD SLEEP RSVD TEMP1 RSVD TEMP0 RSVD RSVD CC1 ZVCHG1 CC0 ZVCHG0 LEGEND: RSVD = Reserved and must be programmed to 0 Figure C-4. Operation Cfg A CC1, CC0 -- These bits configure the bq20z70 for the number of series cells in the battery stack. 0,0 = Reserved 0,1 = 2 cell 1,0 = 3 cell 1,1 = 4 cell (default) SLEEP -- Enables the bq20z70 to enter Sleep mode if SMBus lines are low. 0 = bq20z70 never disables Sleep mode 1 = bq20z70 enters Sleep mode under normal Sleep entry criteria (default) Related Variables: SBS:ManufacturerAccess(0x00):Sleep(0x0011) TEMP1, TEMP0 -- These bits configures the source of the Temperature function 0,0 = Internal Temperature Sensor 0,1 = TS1 Input (default) 1,0 = Greater Value of TS1 or TS2 Inputs 1,1 = Average of TS1 and TS2 Inputs Related Variables: SBS:Temperature(0x08) ZVCHG1, ZVCHG0 -- These bits enable or disable the use of ZVCHG or CHG FET in Zero-Volt/Precharge modes. 0,0 = ZVCHG 0,1 = CHG (default) 1,0 = GPOD of bq29330 1,1 = No Action C.7.1.2 Operation Cfg B (Offset 2) This register enable, disable or configures various features of bq20z70 106 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Configuration Table C-74. Operation Cfg B Subclass Subclass Name ID Offset Name 64 2 Operation Cfg B hex Configuration High Byte Low Byte Format Size in Bytes Min Value Max Value Default Value 2 0x0000 0x3eff 0x3eff Unit bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 RSVD CHGSUSP RSVD OTFET RESCAP CHGFET NCSMB CHGIN NRCHG NR CSYNC CPE CHGTERM HPE RSVD BCAST Figure C-5. Operation Cfg B RESCAP -- This bit configures the compensation model of the Impedance TrackTM Algorithm for reserve capacity calculation. 0 = Light Load Compensation 1 = Average Load Compensation defined by Load Select (default) Related Variables: DF:Gas Gauging:IT Cfg(80):Load Select(0) DF:Gas Gauging:IT Cfg(80):Reserve Cap-mAh(0) DF:Gas Gauging:IT Cfg(80):Reserve Cap-mWh(0) NCSMB -- Disables SMBUS t TIMEOUT feature. Use this bit with caution. 0 = Normal SMBUS t TIMEOUT (default) 1 = Extended SMBUS t TIMEOUT NRCHG -- Enables the CHG FET to remain on during sleep when bq20z70 is in non removable battery mode. 0 = CHG FET turns off in Sleep Mode if [NR] bit is set (default) 1 = CHG FET remains on in Sleep Mode if [NR] bit is set Related Variables: DF:Configuration:Registers(64):Operation Cfg B(2)[NR] CSYNC -- Enables the bq20z70 to write RemainingCapacity to equal FullChargeCapacity when a valid charge termination is detected. 0 = RemainingCapacity is not modified on valid primary charge termination 1 = RemainingCapacity is written up to equal FullChargeCapacity on valid primary charge termination. (default) Related Variables: SBS:RemainingCapacity(0x0f) SBS:FullChargeCapacity(0x10) CHGTERM -- This bit enables or disables [TCA], [FC] flag in BatteryStatus to be cleared after charger termination confirmed. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 107 www.ti.com Configuration 0 = [TCA], [FC] are not cleared by primary charge termination confirmation, but are cleared by other means. (default) 1 = [TCA], [FC] flags are cleared on valid primary charge termination. Note: This does not disable clearing the flags by TCA Clear % and FC Clear %. Related Variables: DF:Charge Control:Termination Cfg(36):Taper Current(2) DF:Charge Control:Termination Cfg(36):TCA Clear %(10) DF:Charge Control:Termination Cfg(36):FC Clear %(12) SBS:Current(0x0a) SBS:BatteryStatus(0x16)[FC], [TCA] CHGSUSP -- This bit enables bq20z70 to turn off CHG FET (and ZVCHG FET) when in charge suspend mode. 0 = No FET change in Charge Suspend mode. (default) 1 = CHG FET and ZVCHG FET (if used) turns off in Charge Suspend mode. OTFET -- This bit enables or disables FET actions from reacting to an overtemperature fault. 0 = There is NO FET action when an overtemperature condition is detected. 1 = When [OTC] flag is set then the CHG FET is turned off and when [OTD] flag is set then the DSG FET is turned off. (default) Related Variables: SBS:SafetyStatus(0x16)[OTC],[OTD] CHGFET -- This bit enables or disables the CHG FET from reacting to a valid charge termination. 0 = CHG FET stays on at charge termination( [TCA] set). (default) 1 = CHG FET turns off at charge termination. Related Variables: SBS:SafetyStatus(0x16)[TCA] CHGIN -- This bit enable the CHG FET and ZVCHG FET (if used) to turn off when the bq20z70 is in charge-inhibit mode. 0 = No FET change in charge-inhibit mode. (default) 1 = Charge and ZVCHG, if used, turn off in charge-inhibit mode. Related Variables: SBS:ChargingStatus(0x55)[XCHG] NR -- This bit configures the bq20z70 in removable or non-removable battery mode and determines the recovery method for current based Primary Protection features. 0 = Removable battery mode. (default) 1 = Non-removable battery mode. Related Variables: DF:Configuration:Registers(64): Non-Removable Cfg(6) 108 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Configuration CPE -- This bit enables or disables PEC transmissions to the smart-battery charger for master-mode alarm messages. 0 = No PEC byte on alarm warning to charger (default) 1 = PEC byte on alarm warning to charger HPE -- This bit enables or disables PEC transmissions to the smart-battery host for master-mode alarm messages and receiving communications from all sources in slave-mode. If host uses PEC is bit should be set. 0 = No PEC byte on alarm warning to host and receiving communications from all sources in slave-mode (default) 1 = PEC byte on alarm warning to host and receiving communications from all sources in slave-mode. If host uses PEC is bit should be set. BCAST -- This bit enables or disables SBS broadcasts to smart charger and host. 0 = Broadcasts to host and charger disabled (default) 1 = Broadcasts to host and charger enabled C.7.1.3 Operation Cfg C (Offset 4) Table C-75. Operation Cfg C Subclass Subclass ID Name Offset Name Format Size in Bytes Min Value Max Value Default Value 64 4 Operation Cfg C hex 2 0x0000 0x0001 0x0000 Configuration High Byte Low Byte Unit bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSVD RSOCL LEGEND: RSVD = Reserved and must be programmed to 0 Figure C-6. Operation Cfg C RSOCL -- This bits configures the RelativeStateofCharge display during charge termination. 0 = RelativeStateOfCharge is not held at 99% until primary charge termination occurs. Fractions of % greater than 99% are rounded up to display 100%. 1 = RelativeStateOfCharge is held at 99% until primary charge termination occurs and displays 100% only upon entering primary charge termination state. C.7.1.4 Permanent Fail Cfg (Offset 6) The Permanent Failure Configuration register enables or disables the use of the SAFE pin when the corresponding permanent fail error occurs and the corresponding bit is set in Permanent Fail Cfg. If the SAFE pin is driven high. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 109 www.ti.com Configuration Table C-76. Permanent Fail Cfg Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 64 Configuration Permanent Fail Cfg hex 0x0000 0x4dff 0x0000 6 2 Unit Related Variables: * DF:PF Status:Device Status Data(96):PF Flags1(0) High Byte Low Byte bit 7 bit 6 RSVD XDFF XPFVSHUT XDFETF bit 5 RSVD XCFETF bit 4 bit 3 bit 2 bit 1 bit 0 RSVD XCIM XSOCD XSOTD XSOCC XSOTC RSVD XSOV XAFE_C XPFIN LEGEND: RSVD = Reserved and must be programmed to 0 Figure C-7. Permanent Fail Cfg XPFVSHUT -- If bit is set AND any permanent failure happens AND the bq20z70 goes into shutdown, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[SOPT] XSOCD -- If bit is set AND discharge safety overcurrent error occurs, the SAFE pin is set to high. XSOCC -- If bit is set AND charge safety overcurrent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[SOCC] XSOCD -- If bit is set AND discharge safety overcurrent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[SOCD] XAFE_C -- If bit is set AND AFE-communications permanent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[AFE_C] XDFF -- If bit is set AND Data Flash fault permanent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[DFF] XDFETF -- If bit is set AND discharge FET permanent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[DFETF] XCFETF -- If bit is set AND CHG FET permanent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[CFETF] XCIM -- If bit is set AND cell imbalance permanent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[CIM] XSOTD -- If bit is set AND discharge overtemperature permanent failure occurs, the SAFE pin is set to high. 110 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Power DF:PF Status:Device Status Data(96):PF Flags1(0)[SOTD] XSOTC -- If bit is set AND charge overtemperature permanent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[SOTC] XSOV -- If bit is set AND safety overvoltage permanent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[SOV] XPFIN -- If bit is set AND external input indication permanent failure occurs, the SAFE pin is set to high. DF:PF Status:Device Status Data(96):PF Flags1(0)[PFIN] C.7.1.5 Non-Removable Cfg (Offset 8) If bq20z70 is in removable battery mode ( [NR] = 0), these bits sets the recovery method from 1st level security errors. If corresponding bit is set, it gives an additional [NR] = 1 recovery option for the particular fault. If [NR] is set to 1, this register has no effect. Table C-77. Non Removable Cfg Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 64 Configuration 8 Non-Removable Cfg hex 2 0x0000 0x3027 0x0000 Unit Related Variables: * DF:Configuration:Registers(64):Operation Cfg B(2)[NR] High Byte Low Byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 RSVD RSVD RSVD RSVD OCD OC OCC RSVD RSVD RSVD RSVD AOCD RSVD SCC RSVD SCD LEGEND: RSVD = Reserved and must be programmed to 0 Figure C-8. Non-Removable Cfg OCD -- Overcurrent in Discharge OCC -- Overcurrent in Charge OC -- Over Charge Capacity AOCD -- AFE Overcurrent in Discharge SCC -- Short Circuit in Charge SCD -- Short Circuit in Discharge C.8 Power C.8.1 Power (Subclass 68) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 111 www.ti.com Power C.8.1.1 Flash Update OK Voltage (Offset 0) This value sets the minimum allowed battery pack voltage for flash update. If battery pack Voltage is below this threshold no flash update will be made. If charger present is detected with Charger Present, the is value is bypassed and flash can be updated. Table C-78. Flash Update OK Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 68 Power 0 Flash Update OK Voltage unsigned integer 2 6000 20000 7500 mV Related Variables: * DF:Power:Power(68):Charger Present(5) * SBS:Voltage(0x09) C.8.1.2 Shutdown Voltage (Offset 2) The bq20z70 goes into shutdown mode if battery Voltage is equal to or less than Shutdown Voltage for 10s and has been out of shutdown mode at least for 10s. Table C-79. Shutdown Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 68 2 Shutdown Voltage unsigned integer 2 5000 20000 7000 mV Power Related Variables: * SBS:Voltage(0x09) C.8.1.3 Charger Present (Offset 5) The bq20z70 detects a charger when the voltage at PACK pin of bq29330 is above this threshold. If a charger is detected, it overrides Flash Update Ok Voltage and flash can be updated. Table C-80. Charger Present Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 68 Power 5 Charger Present unsigned integer 2 0 23000 3000 mV Related Variables: * DF:Power:Power(68):Flash Update OK Voltage(0) C.8.1.4 Wake Current Reg (Offset 16) Wake Current Reg configures the current threshold required to wake the bq20z70 from sleep mode by detecting voltage across SRN and SRP. Table C-81. Wake Current Reg 112 Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 68 Power 16 Wake Current Reg hex 1 0x00 0xff 0x00 Data Flash Unit SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Gas Gauging Low Byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 RSVD RSVD RSVD RSVD RSVD IWAKE RSNS1 RSNS0 LEGEND: RSVD = Reserved and must be programmed to 0 Figure C-9. Wake Current Reg IWAKE --This bit sets the current threshold for the Wake function. 0 = 0.5A (or if RSNS0=RSNS1=0 then this function is disabled) 1 = 1.0A (or if RSNS0=RSNS1=0 then this function is disabled) Table C-82. Wake Current Reg RSNS1 RSNS0 Resistance 0 0 Disabled (Default) 0 1 2.5 m 1 0 5 m 1 1 10 m Related Variables: * DF:Configuration:Registers(64):Operation Cfg A(0)[SLEEP] * SBS:Current(0x0a) C.9 Gas Gauging C.9.1 IT Cfg (Offset 80) C.9.1.1 Load Select (Offset 0) This value defines the load compensation model used by the Impedance TrackTM algorithm for remaining capacity calculation. Constant Current ( Load Mode = 0) Constant Power ( Load Mode = 1) 0 = Avg I Last Run Avg P Last Run 1 = present average discharge current present average discharge power 2 = Current Current x Voltage 3 = AverageCurrent (default) AverageCurrent x average Voltage 4 = Design Capacity / 5 Design Energy / 5 5 = AtRate (mA) AtRate (10 mW) 6 = User Rate-mA User Rate-10mWh Table C-83. Load Select Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 80 IT Cfg 0 Load Select unsigned integer 1 0 255 3 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Unit Data Flash 113 www.ti.com Gas Gauging Related Variables: * DF:SBS Configuration:Data(48):Design Capacity(22) * DF:SBS Configuration:Data(48):Design Energy(24) * DF:Gas Gauging:IT Cfg(80):Load Mode(1) * DF:Gas Gauging:IT Cfg(80):User Rate-mA(60) * DF:Gas Gauging:IT Cfg(80):User Rate-10mW(62) * SBS:BatteryMode(0x03)[CapM] * SBS:AtRate(0x04) * SBS:Voltage(0x09) * SBS:Current(0x0a) * SBS:AverageCurrent(0x0b) C.9.1.2 Load Mode (Offset 1) This value defines the load mode used by the Impedance TrackTM algorithm for remaining capacity calculation. 0 = Constant Current (default) 1 = Constant Power Table C-84. Load Mode Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 80 IT Cfg 1 Load Mode unsigned integer 1 0 255 0 Unit Related Variables: * DF:Gas Gauging:IT Cfg(80):Load Select(0) C.9.1.3 Term Voltage (Offset 45) This value is the absolute minimum pack voltage used by the Impedance TrackTM algorithm for capacity calculation and should also set to the absolute minimum pack voltage used by application. The reserve capacity function also reserves charge where zero RemainingCapacity is reported and the Term Voltage is reached. Table C-85. Term Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 80 IT Cfg 45 Term Voltage signed integer 2 -32768 32767 12000 mV Related Variables: * DF:Gas Gauging:IT Cfg(80):Reserve Cap-mAh(64) * DF:Gas Gauging:IT Cfg(80):Reserve Cap-mWh(66) * SBS:Voltage(0x09) * SBS:RemainingCapacity(0x0f) C.9.1.4 User Rate-mA (Offset 60) This value specifies the discharge rate used by the Impedance TrackTM algorithm for remaining capacity calculation if selected by Load Select. 114 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Gas Gauging Table C-86. User Rate-mA Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 80 IT Cfg 60 User Rate-mA signed integer 2 -9000 -2000 0 mA Related Variables: * DF:Gas Gauging:IT Cfg(80):Load Select(0) * DF:Gas Gauging:IT Cfg(80):Load Mode(1) C.9.1.5 User Rate-10mW (Offset 62) This value specifies the discharge rate in 10 mW used by the Impedance TrackTM algorithm for remaining capacity calculation if selected by Load Select. Table C-87. User Rate-mW Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 80 IT Cfg 62 User Rate-10mW signed integer 2 -14000 -3000 0 10 mW Related Variables: * DF:Gas Gauging:IT Cfg(80):Load Select(0) * DF:Gas Gauging:IT Cfg(80):Load Mode(1) C.9.1.6 Reserve Cap-mAh (Offset 64) This value reserves a amount of charge in mAh ( CAPACITY_MODE = 0) for the system to react if the RemainingCapacity reports zero energy remains in the battery. The Reserve Cap-mAh reserves a amount of charge between the final Term Voltage is reached and the RemainingCapacity reports 0 energy. The FullChargeCapacity function reports the internally full charge capacity reduced by Reserve Cap-mAh. Table C-88. Reserve Cap-mAh Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 80 IT Cfg 64 Reserve Cap-mAh signed integer 2 0 9000 0 mAh Related Variables: * DF:Gas Gauging:IT Cfg(80):Load Mode(1) * DF:Gas Gauging:IT Cfg(80):Term Voltage(45) * DF:Configuration:Registers(64):Operation Cfg B(2)[RESCAP] * SBS:BatteryMode(0x03):[CapM] * SBS:RemainingCapacity(0x0f) * SBS:FullChargeCapacity(0x10) C.9.1.7 Reserve Cap-mWh (Offset 66) This value reserves a amount of charge in 10 mWh ( CAPACITY_MODE = 1) for the system to react if the RemainingCapacity reports zero energy remains in the battery. The Reserve Cap-mWh reserves a amount of charge between the final Term Voltage is reached and the RemainingCapacity reports 0 energy. The FullChargeCapacity function reports the internally full charge capacity reduced by Reserve Cap-mAh. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 115 www.ti.com Gas Gauging Table C-89. Reserve Cap-mAh Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 80 IT Cfg 66 Reserve Cap-mWh signed integer 2 0 14000 0 10 mWh Related Variables: * DF:Gas Gauging:IT Cfg(80):Load Mode(1) * DF:Gas Gauging:IT Cfg(80):Term Voltage(45) * DF:Configuration:Registers(64):Operation Cfg B(2)[RESCAP] * SBS:BatteryMode(0x03):[CapM] * SBS:RemainingCapacity(0x0f) * SBS:FullChargeCapacity(0x10) C.9.2 Current Thresholds (Offset 81) C.9.2.1 Dsg Current Threshold (Offset 0) bq20z70 enters discharge mode from relaxation mode or charge mode if Current < (-) Dsg Current Threshold Table C-90. Dsg Current Threshold Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 81 IT Cfg 0 Dsg Current Threshold unsigned integer 2 0 2000 100 mA Related Variables: * SBS:Current(0x0a) * SBS:BatteryStatus(0x16)[DSG] C.9.2.2 Chg Current Threshold (Offset 2) bq20z70 enters charge mode from relaxation mode or discharge mode if Current > Chg Current Threshold. Table C-91. Chg Current Threshold Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 81 IT Cfg 2 Chg Current Threshold unsigned integer 2 0 2000 50 mA Related Variables: * SBS:Current(0x0a) * SBS:BatteryStatus(0x16)[DSG] C.9.2.3 Quit Current (Offset 4) The bq20z70 enters relaxation mode from charge mode if Current goes below Quit Current for a period of 60s. The bq20z70 also enters relaxation mode from discharge mode if Current goes above (-)Quit Current for a period of 1s. Table C-92. Quit Current 116 Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 81 IT Cfg 4 Quit Current unsigned integer 2 0 1000 10 mA Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Gas Gauging Related Variables: * SBS:Current(0x0a) * SBS:BatteryStatus(0x16)[DSG] C.9.3 State (Offset 82) C.9.3.1 Qmax Cell 0..3 (Offset 0..6) This value defines the maximum chemical capacity for all cells used for capacity calculation. The value should be taken directly from battery cell datasheet. Table C-93. Qmax Cell 0..3 Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 82 State 0 Qmax Cell 0 2 0 65535 4400 mAh 2 Qmax Cell 1 unsigned integer 2 0 65535 4400 mAh 4 Qmax Cell 2 2 0 65535 4400 mAh 6 Qmax Cell 3 2 0 65535 4400 mAh Related Variables: * DF:Gas Gauging:State(82):Qmax Pack(8) * SBS:OperationStatus(0x54)[QEN] C.9.3.2 Qmax Pack (Offset 8) This value defines the maximum chemical capacity of the battery pack. Usually get set to the smallest value of Qmax Cell 0 .. Qmax Cell 0. Table C-94. Qmax Pack Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 82 State 8 Qmax Pack unsigned integer 2 0 65535 4400 mAh Related Variables: * DF:Gas Gauging:State(82):Qmax Cell 0(0) * DF:Gas Gauging:State(82):Qmax Cell 1(2) * DF:Gas Gauging:State(82):Qmax Cell 2(4) * DF:Gas Gauging:State(82):Qmax Cell 3(6) * SBS:OperationStatus(0x54)[QEN] C.9.3.3 Update Status (Offset 12) It is recommended to use ManufactureAccess to enable or disable Impedance TrackTM algorithm updating. 0x00 = no Impedance TrackTM algorithm updating (default) 0x02 = Qmax updated 0x04 = Impedance TrackTM algorithm updating 0x06 = Qmax updated + Impedance TrackTM algorithm updating SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 117 www.ti.com Ra Table Table C-95. Update Status Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 82 State 12 Update Status hex 2 0x00 0x06 0 Unit Related Variables: * SBS:ManufactureAccess(0x00):IT Enable(0x0021) C.9.3.4 Delta Voltage (Offset 25) The bq20z70 stores the maximum difference of Voltage during short load spikes and normal load, so the Impedance TrackTM algorithm can calculate remaining capacity for pulsed loads. It is not recommended to change this value. Table C-96. Delta Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 82 State 25 Delta Voltage signed integer 2 -32768 32767 0 mV Related Variables: * SBS:Voltage(0x09) C.10 Ra Table C.10.1 R_a0 (Subclass 88) C.10.1.1 Cell0 R_a flag (Offset 0) This value indicates the validity of the cell impedance table for cell 0. It is recommended not to change this value. High Byte Low Byte 0x00 cell impedance & Qmax updated 0x00 table not used & Qmax updated 0x05 relaxation mode and Qmax update in process 0x55 table being used 0x55 discharge mode & cell impedance updated 0xff table never used, no Qmax or cel impedance update 0xff cell impedance newer updated Table C-97. Cell0 R_a flag Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 88 R_a0 0 Cell0 R_a flag hex 2 0x0000 0xffff 0xff55 Unit Related Variables: * DF:Ra Table:R_a0(88):Cell0 R_a 0..14(2..30) 118 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Ra Table C.10.1.2 Cell0 R_a 0..14 (Offset 2..30) The bq20z70 stores and updates the impedance profile for cell 0 in this table. Table C-98. Cell0 R_a Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 88 R_a0 2 Cell0 R_a 0 signed integer 2 0 32767 160 2^-10 4 Cell0 R_a 1 0 32767 166 6 Cell0 R_a 2 0 32767 153 8 Cell0 R_a 3 0 32767 151 10 Cell0 R_a 4 0 32767 145 12 Cell0 R_a 5 0 32767 152 14 Cell0 R_a 6 0 32767 176 16 Cell0 R_a 7 0 32767 204 18 Cell0 R_a 8 0 32767 222 20 Cell0 R_a 9 0 32767 254 22 Cell0 R_a 10 0 32767 315 24 Cell0 R_a 11 0 32767 437 26 Cell0 R_a 12 0 32767 651 28 Cell0 R_a 13 0 32767 1001 30 Cell0 R_a 14 0 32767 1458 Related Variables: * DF:Ra Table:R_a0(88):Cell0 R_a Flag(0) C.10.2 R_a1 (Subclass 89) C.10.2.1 Cell1 R_a flag (Offset 0) This value indicates the validity of the cell impedance table for cell 1. It is recommended not to change this value. High Byte Low Byte 0x00 cell impedance & Qmax updated 0x00 table not used & Qmax updated 0x05 relaxation mode and Qmax update in process 0x55 table being used 0x55 discharge mode & cell impedance updated 0xff table never used, no Qmax or cel impedance update 0xff cell impedance newer updated Table C-99. Cell1 R_a flag Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 89 R_a1 0 Cell1 R_a flag hex 2 0x0000 0xffff 0xff55 Unit Related Variables: * DF:Ra Table:R_a1(89):Cell1 R_a 0..14(2..30) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 119 www.ti.com Ra Table C.10.2.2 Cell1 R_a 0..14 (Offset 2..30) The bq20z70 stores and updates the impedance profile for cell 1 in this table. Table C-100. Cell1 R_a Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 88 R_a1 2 Cell1 R_a 0 signed integer 2 0 32767 160 2^-10 4 Cell1 R_a 1 0 32767 166 6 Cell1 R_a 2 0 32767 153 8 Cell1 R_a 3 0 32767 151 10 Cell1 R_a 4 0 32767 145 12 Cell1 R_a 5 0 32767 152 14 Cell1 R_a 6 0 32767 176 16 Cell1 R_a 7 0 32767 204 18 Cell1 R_a 8 0 32767 222 20 Cell1 R_a 9 0 32767 254 22 Cell1 R_a 10 0 32767 315 24 Cell1 R_a 11 0 32767 437 26 Cell1 R_a 12 0 32767 651 28 Cell1 R_a 13 0 32767 1001 30 Cell1 R_a 14 0 32767 1458 Related Variables: * DF:Ra Table:R_a1(89):Cell1 R_a Flag(0) C.10.3 R_a2 (Subclass 90) C.10.3.1 Cell2 R_a flag (Offset 0) This value indicates the validity of the cell impedance table for cell 2. It is recommended not to change this value. High Byte Low Byte 0x00 cell impedance & Qmax updated 0x00 table not used & Qmax updated 0x05 relaxation mode and Qmax update in process 0x55 table being used 0x55 discharge mode & cell impedance updated 0xff table never used, no Qmax or cel impedance update 0xff cell impedance newer updated Table C-101. Cell2 R_a flag Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 90 R_a2 0 Cell2 R_a flag hex 2 0x0000 0xffff 0xff55 Unit Related Variables: * DF:Ra Table:R_a2(90):Cell2 R_a 0..14(2..30) 120 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Ra Table C.10.3.2 Cell2 R_a 0..14 (Offset 2..30) The bq20z70 stores and updates the impedance profile for cell 2 in this table. Table C-102. Cell2 R_a Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 88 R_a2 2 Cell2 R_a 0 signed integer 2 0 32767 160 2^-10 4 Cell2 R_a 1 0 32767 166 6 Cell2 R_a 2 0 32767 153 8 Cell2 R_a 3 0 32767 151 10 Cell2 R_a 4 0 32767 145 12 Cell2 R_a 5 0 32767 152 14 Cell2 R_a 6 0 32767 176 16 Cell2 R_a 7 0 32767 204 18 Cell2 R_a 8 0 32767 222 20 Cell2 R_a 9 0 32767 254 22 Cell2 R_a 10 0 32767 315 24 Cell2 R_a 11 0 32767 437 26 Cell2 R_a 12 0 32767 651 28 Cell2 R_a 13 0 32767 1001 30 Cell2 R_a 14 0 32767 1458 Related Variables: * DF:Ra Table:R_a2(90):Cell2 R_a Flag(0) C.10.4 R_a3 (Subclass 91) C.10.4.1 Cell3 R_a flag (Offset 0) This value indicates the validity of the cell impedance table for cell 3. It is recommended not to change this value. High Byte Low Byte 0x00 cell impedance & Qmax updated 0x00 table not used & Qmax updated 0x05 relaxation mode and Qmax update in process 0x55 table being used 0x55 discharge mode & cell impedance updated 0xff table never used, no Qmax or cel impedance update 0xff cell impedance newer updated Table C-103. Cell3 R_a flag Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 91 R_a3 0 Cell3 R_a flag hex 2 0x0000 0xffff 0xff55 Unit Related Variables: * DF:Ra Table:R_a3(91):Cell3 R_a 0..14(2..30) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 121 www.ti.com Ra Table C.10.4.2 Cell3 R_a 0..14 (Offset 2..30) The bq20z70 stores and updates the impedance profile for cell 3 in this table. Table C-104. Cell3 R_a Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 88 R_a3 2 Cell3 R_a 0 signed integer 2 0 32767 160 2^-10 4 Cell3 R_a 1 0 32767 166 6 Cell3 R_a 2 0 32767 153 8 Cell3 R_a 3 0 32767 151 10 Cell3 R_a 4 0 32767 145 12 Cell3 R_a 5 0 32767 152 14 Cell3 R_a 6 0 32767 176 16 Cell3 R_a 7 0 32767 204 18 Cell3 R_a 8 0 32767 222 20 Cell3 R_a 9 0 32767 254 22 Cell3 R_a 10 0 32767 315 24 Cell3 R_a 11 0 32767 437 26 Cell3 R_a 12 0 32767 651 28 Cell3 R_a 13 0 32767 1001 30 Cell3 R_a 14 0 32767 1458 Related Variables: * DF:Ra Table:R_a3(91):Cell3 R_a Flag(0) C.10.5 R_a0x (Subclass 92) C.10.5.1 xCell0 R_a flag (Offset 0) This value indicates the validity of the cell impedance table for cell 0. It is recommended not to change this value. High Byte Low Byte 0x00 cell impedance & Qmax updated 0x00 table not used & Qmax updated 0x05 relaxation mode and Qmax update in process 0x55 table being used 0x55 discharge mode & cell impedance updated 0xff table never used, no Qmax or cel impedance update 0xff cell impedance newer updated Table C-105. xCell0 R_a flag Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 92 R_a0x 0 xCell0 R_a flag hex 2 0x0000 0xffff 0xffff Unit Related Variables: * DF:Ra Table:R_a0x(92):xCell0 R_a 0..14(2..30) 122 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Ra Table C.10.5.2 xCell0 R_a 0..14 (Offset 2..30) The bq20z70 stores and updates the impedance profile for cell 0 in this table. Table C-106. xCell0 R_a Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 88 R_a0x 2 xCell0 R_a 0 signed integer 2 0 32767 160 2^-10 4 xCell0 R_a 1 0 32767 166 6 xCell0 R_a 2 0 32767 153 8 xCell0 R_a 3 0 32767 151 10 xCell0 R_a 4 0 32767 145 12 xCell0 R_a 5 0 32767 152 14 xCell0 R_a 6 0 32767 176 16 xCell0 R_a 7 0 32767 204 18 xCell0 R_a 8 0 32767 222 20 xCell0 R_a 9 0 32767 254 22 xCell0 R_a 10 0 32767 315 24 xCell0 R_a 11 0 32767 437 26 xCell0 R_a 12 0 32767 651 28 xCell0 R_a 13 0 32767 1001 30 xCell0 R_a 14 0 32767 1458 Related Variables: * DF:Ra Table:R_a0x(89):xCell0 R_a Flag(0) C.10.6 R_a1x (Subclass 93) C.10.6.1 xCell1 R_a flag (Offset 0) This value indicates the validity of the cell impedance table for cell 1. It is recommended not to change this value. High Byte Low Byte 0x00 cell impedance & Qmax updated 0x00 table not used & Qmax updated 0x05 relaxation mode and Qmax update in process 0x55 table being used 0x55 discharge mode & cell impedance updated 0xff table never used, no Qmax or cel impedance update 0xff cell impedance newer updated Table C-107. xCell1 R_a flag Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 93 R_a1x 0 xCell1 R_a flag hex 2 0x0000 0xffff 0xffff Unit Related Variables: * DF:Ra Table:R_a1x(93):xCell1 R_a 0..14(2..30) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 123 www.ti.com Ra Table C.10.6.2 xCell1 R_a 0..14 (Offset 2..30) The bq20z70 stores and updates the impedance profile for cell 1 in this table. Table C-108. xCell1 R_a Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 88 R_a1x 2 xCell1 R_a 0 signed integer 2 0 32767 160 2^-10 4 xCell1 R_a 1 0 32767 166 6 xCell1 R_a 2 0 32767 153 8 xCell1 R_a 3 0 32767 151 10 xCell1 R_a 4 0 32767 145 12 xCell1 R_a 5 0 32767 152 14 xCell1 R_a 6 0 32767 176 16 xCell1 R_a 7 0 32767 204 18 xCell1 R_a 8 0 32767 222 20 xCell1 R_a 9 0 32767 254 22 xCell1 R_a 10 0 32767 315 24 xCell1 R_a 11 0 32767 437 26 xCell1 R_a 12 0 32767 651 28 xCell1 R_a 13 0 32767 1001 30 xCell1 R_a 14 0 32767 1458 Related Variables: * DF:Ra Table:R_a0x(93):xCell1 R_a Flag(0) C.10.7 R_a2x (Subclass 94) C.10.7.1 xCell2 R_a flag (Offset 0) This value indicates the validity of the cell impedance table for cell 2. It is recommended not to change this value. High Byte Low Byte 0x00 cell impedance & Qmax updated 0x00 table not used & Qmax updated 0x05 relaxation mode and Qmax update in process 0x55 table being used 0x55 discharge mode & cell impedance updated 0xff table never used, no Qmax or cel impedance update 0xff cell impedance newer updated Table C-109. xCell2 R_a flag Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 94 R_a2x 0 xCell2 R_a flag hex 2 0x0000 0xffff 0xffff Unit Related Variables: * DF:Ra Table:R_a2x(94):xCell2 R_a 0..14(2..30) 124 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Ra Table C.10.7.2 xCell2 R_a 0..14 (Offset 2..30) The bq20z70 stores and updates the impedance profile for cell 2 in this table. Table C-110. xCell2 R_a Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 88 R_a2x 2 xCell2 R_a 0 signed integer 2 0 32767 160 2^-10 4 xCell2 R_a 1 0 32767 166 6 xCell2 R_a 2 0 32767 153 8 xCell2 R_a 3 0 32767 151 10 xCell2 R_a 4 0 32767 145 12 xCell2 R_a 5 0 32767 152 14 xCell2 R_a 6 0 32767 176 16 xCell2 R_a 7 0 32767 204 18 xCell2 R_a 8 0 32767 222 20 xCell2 R_a 9 0 32767 254 22 xCell2 R_a 10 0 32767 315 24 xCell2 R_a 11 0 32767 437 26 xCell2 R_a 12 0 32767 651 28 xCell2 R_a 13 0 32767 1001 30 xCell2 R_a 14 0 32767 1458 Related Variables: * DF:Ra Table:R_a2x(94):xCell2 R_a Flag(0) C.10.8 R_a3x (Subclass 95) C.10.8.1 xCell3 R_a flag (Offset 0) This value indicates the validity of the cell impedance table for cell 3. It is recommended not to change this value. High Byte Low Byte 0x00 cell impedance & Qmax updated 0x00 table not used & Qmax updated 0x05 relaxation mode and Qmax update in process 0x55 table being used 0x55 discharge mode & cell impedance updated 0xff table never used, no Qmax or cel impedance update 0xff cell impedance newer updated Table C-111. xCell3 R_a flag Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 95 R_a3x 0 xCell3 R_a flag hex 2 0x0000 0xffff 0xffff Unit Related Variables: * DF:Ra Table:R_a3x(95):xCell3 R_a 0..14(2..30) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 125 www.ti.com PF Status C.10.8.2 xCell3 R_a 0..14 (Offset 2..30) The bq20z70 stores and updates the impedance profile for cell 3 in this table. Table C-112. xCell3 R_a Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 88 R_a3x 2 xCell3 R_a 0 signed integer 2 0 32767 160 2^-10 4 xCell3 R_a 1 0 32767 166 6 xCell3 R_a 2 0 32767 153 8 xCell3 R_a 3 0 32767 151 10 xCell3 R_a 4 0 32767 145 12 xCell3 R_a 5 0 32767 152 14 xCell3 R_a 6 0 32767 176 16 xCell3 R_a 7 0 32767 204 18 xCell3 R_a 8 0 32767 222 20 xCell3 R_a 9 0 32767 254 22 xCell3 R_a 10 0 32767 315 24 xCell3 R_a 11 0 32767 437 26 xCell3 R_a 12 0 32767 651 28 xCell3 R_a 13 0 32767 1001 30 xCell3 R_a 14 0 32767 1458 Related Variables: * DF:Ra Table:R_a3x(95):xCell3 R_a Flag(0) C.11 PF Status C.11.1 Device Status Data (Subclass 96) C.11.1.1 PF Flags 1 (Offset 0) The flags in PF Flags 1 register indicates the reason that bq20z70 has entered permanent failure. If the failure flag in PF Flags 1 matches the bit in Permanent Fail Cfg, the SAFE pin is driven high. The SAFE pin can be used to blow a optional fuse in a severe failure condition to prevent more damage of the system. All permanent failure flags in the failure sequence are stored in PF Flags 1. Only the first permanent failure flag in a failure sequence is stored in PF Flags 2 to indicate the cause of the permanent failure. Table C-113. PF Flags 1 Subclass ID Subclass Name Offset 96 Device Status Data 0 Name Format Size in Bytes Min Value Max Value Default Value PF Flags 1 hex 2 0x0000 0xffff 0x0000 Unit Related Variables: * DF:Configuration:Registers(64):Permanent Fail Cfg(4) * DF:PF Status:Device Status Data(96):PF Flags 2(28) * SBS:PFStatus(0x53) 126 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Calibration bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 High Byte RSVD RSVD RSVD SOCD SOCC RSVD ACE_C Low Byte DFF XPFVSHU T DFETF CFETF CIM SOTD SOTC SOV PFIN LEGEND: All Values Read Only Figure C-10. PF Flags 1 XPFVSHUT -- = 1: Another Permanent Failure has occurred AND device went to shutdown after that event SOCD -- = 1: Safety Overcurrent in Discharge permanent failure SOCC -- = 1: Safety Overcurrent in Charge permanent failure AFE_C -- =1 AFE-Communications permanent failure DFF -- = 1: Data Flash Fault permanent failure DFETF -- = 1: Discharge FET permanent failure CFETF -- = 1: Charge FET permanent failure CIM -- = 1: Cell-Imbalance permanent failure SOTD -- = 1: Discharge Safety Overtemperature permanent failure SOTC -- = 1: Charge Safety Overtemperature permanent failure SOV -- = 1: Safety-Overvoltage permanent failure PFIN -- = 1: External PFIN Input of bq29330 Indication of a Permanent Failure. C.11.1.2 PF Flags 2 (Offset 28) On first occurrence of permanent failure, when PFStatus changes from 0x0000, then the PFStatus flags will captured and stored in this value. Only the first permanent failure flag in a failure sequence is stored in PF Flags 2 to indicate the cause of the permanent failure. All permanent failure flags in the failure sequence are stored in PF Flags 1. Table C-114. PF Flags 2 Subclass ID Subclass Name Offset 96 Device Status Data 28 Name Format Size in Bytes Min Value Max Value Default Value PF Flags 2 hex 2 0x0000 0xffff 0x0000 Unit Related Variables: * DF:PF Status:Device Status Data(96):PF Flags 1(0) * SBS:PFStatus(0x53) C.12 Calibration C.12.1 Data (Subclass 104) C.12.1.1 CC Gain (Offset 0) CC Gain sets the mA current scale factor for the coulomb counter. Use calibration routines to set this value. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 127 www.ti.com Calibration Table C-115. CC Gain Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 104 Data 0 CC Gain floating point 4 -1E128 1E128 0.471 Unit Related Variables: * SBS:Current(0x0a) C.12.1.2 CC Delta (Offset 4) CC Delta sets the mAh capacity scale factor for the coulomb counter. Use calibration routines to set this value. Table C-116. CC Delta Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 104 Data 4 CC Delta floating point 4 -1E128 1E128 140500 Unit Related Variables: * SBS:RemainingCapacity(0x0f) * SBS:FullChargeCapacity(0x10) C.12.1.3 Ref Voltage (Offset 8) This register value stores the AFE reference voltage in units of 0.5 mV. Table C-117. Ref Voltage Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 104 Data 8 Ref Voltage signed integer 2 0 32767 2450 0.5mV Related Variables: * none C.12.1.4 AFE Pack Gain (Offset 12) This register value stores the scale factor for the voltage at PACK pin of the bq29330 AFE. Table C-118. AFE Pack Gain Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 104 Data 12 AFE Pack Gain unsigned integer 2 0 65535 30625 mV/cnt Related Variables: * none C.12.1.5 CC Offset (Offset 14) This register value stores the coulomb counter offset compensation. It is set by automatic calibration of the bq20z70. It is not recommended to change this value. Table C-119. CC Offset 128 Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 104 Data 14 CC Offset signed integer 2 -32768 32767 -12250 Data Flash Unit SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Calibration Related Variables: * none C.12.1.6 Board Offset (Offset 16) This register value stores the compensation for PCB dependant coulomb counter offset. It is recommended to use characterization data of actual PCB to set this value. Table C-120. Board Offset Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 104 Data 16 Board Offset signed integer 1 -128 127 0 Unit Related Variables: * Calibration:Data(104):CC Offset(14) C.12.1.7 Int Temp Offset (Offset 18) This register value stores the internal temperature sensor offset compensation. Use calibration routines to set this value. Table C-121. Int Temp Offset Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 104 Data 18 Int Temp Offset signed integer 1 -128 127 0 Unit Related Variables: * DF:Configuration:Registers(64):Operation Cfg A(0)[TEMP1], [TEMP0] * SBS:Temperature(0x08) C.12.1.8 Ext1 Temp Offset (Offset 19) This register value stores the temperature sensor offset compensation for the external temperature sensor 1 connected at TS1 pin of the bq20z70. Use calibration routines to set this value. Table C-122. Ext1 Temp Offset Subclass ID Subclass Name Offset Name Format 104 Data 19 Ext1 Temp Offset signed integer Size in Bytes Min Value Max Value Default Value 1 -128 127 0 Unit Related Variables: * DF:Configuration:Registers(64):Operation Cfg A(0)[TEMP1], [TEMP0] * SBS:Temperature(0x08) C.12.1.9 Ext2 Temp Offset (Offset 20) This register value stores the temperature sensor offset compensation for the external temperature sensor 2 connected at TS2 pin of the bq20z70. Use calibration routines to set this value. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 129 www.ti.com Calibration Table C-123. Ext2 Temp Offset Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value 104 Data 20 Ext2 Temp Offset signed integer 1 -128 127 0 Unit Related Variables: * DF:Configuration:Registers(64):Operation Cfg A(0)[TEMP1], [TEMP0] * SBS:Temperature(0x08) C.12.2 Config (Subclass 105) C.12.2.1 CC Current (Offset 0) This value sets the current used for CC calibration when in calibration mode. Table C-124. CC Current Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 0 CC Current unsigned integer 2 0 65535 3000 mA Related Variables: * SBS:Current(0x0a) C.12.2.2 Voltage Signal (Offset 2) This value sets the voltage used for calibration when in calibration mode. Table C-125. Voltage Signal Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 2 Voltage Signal unsigned integer 2 0 65535 16800 mV Related Variables: * SBS:Voltage(0x09) C.12.2.3 Temp Signal (Offset 4) This value sets the temperature used for temperature calibration in calibration mode Table C-126. Temp Signal Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 4 Temp Signal unsigne d integer 2 0 65535 2980 0.1C Related Variables: * SBS:Temperature(0x08) C.12.2.4 CC Offset Time (Offset 6) This value sets the time used for CC Offset calibration in calibration mode. More time means more accuracy. The legitimate values for this constant are integer multiplies of 250. Numbers less than 250 will cause a CC offset calibration error. Numbers greater than 250 will be rounded down to the nearest multiple of 250. 130 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Calibration Table C-127. CC Offset Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 6 CC Offset Time unsigned integer 2 0 65535 250 mSec Related Variables: * Calibration:Data(104):CC Offset(14) C.12.2.5 ADC Offset Time (Offset 8) This constant defines the time for ADC offset calibration in calibration mode. More time means more accuracy. The legitimate values for this constant are integer multiplies of 32. Numbers less than 32 will cause a ADC offset calibration error. Numbers greater than 32 will be rounded down to the nearest multiple of 32. Table C-128. ADC Offset Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 8 ADC Offset Time unsigned integer 2 0 65535 32 mSec Related Variables: * none C.12.2.6 CC Gain Time (Offset 10) This constant defines the time for the coulomb counter gain calibration in calibration mode. More time means more accuracy. The legitimate values for this constant are integer multiplies of 250. Numbers less than 250 will cause a CC gain calibration error. Numbers greater than 250 will be rounded down to the nearest multiple of 250. Table C-129. CC Gain Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 10 CC Gain Time unsigned integer 2 0 65535 250 mSec Related Variables: * Calibration:Data(104):CC Gain(0) C.12.2.7 Voltage Time (Offset 12) This constant defines the time for voltage calibration in calibration mode. More time means more accuracy. The legitimate values for this constant are integer multiplies of 1984. Numbers less than 1984 will cause a voltage calibration error. Numbers greater than 1984 will be rounded down to the nearest multiple of 1984. Table C-130. Voltage Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 12 Voltage Time unsigned integer 2 0 65535 1984 mSec Related Variables: * SBS:Voltage(0x09) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 131 www.ti.com Calibration C.12.2.8 Temperature Time (Offset 14) This constant defines the time for temperature calibration in calibration mode. More time means more accuracy. The legitimate values for this constant are integer multiplies of 32. Numbers less than 32 will cause a temperature calibration error. Numbers greater than 32 will be rounded down to the nearest multiple of 32. Table C-131. Temperature Time Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 14 Temperature Time unsigned integer 2 0 65535 32 mSec Related Variables: * Calibration:Data(104):Int Temp Offset(18) * Calibration:Data(104):Ext1 Temp Offset(19) * Calibration:Data(104):Ext2 Temp Offset(20) * SBS:Temperature(0x08) C.12.2.9 Cal Mode Timeout (Offset 17) The bq20z70 will exit calibration mode automatically after Calibration Mode Timeout period. Table C-132. Cal Mode Timeout Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 105 Config 17 Cal Mode Timeout unsigned integer 2 0 65535 38400 Sec / 128 Related Variables: * SBS:ManufacturerAccess(0x00):Calibration Mode(0x0040) C.12.3 Temp Model (Subclass 106) C.12.3.1 Ext Coef 1..4, Ext Min AD, Ext Max Temp These values characterize the external temperature sense resistor connected to TS1 pin or TS2 pin of bq20z70. The default values characterize the Semitec 103AT NTC resistor. Do not modify these values without consulting TI. Table C-133. Ext Coef 1..4, Ext Min AD, Ext Max Temp Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 106 Temp Model 0 Ext Coef 1 signed integer 2 -32768 32767 -28285 Sec 2 Ext Coef 2 20848 4 Ext Coef 3 -7537 6 Ext Coef 4 4012 8 Ext Min AD 0 10 Ext Max Temp 4012 Related Variables: * none 132 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Calibration C.12.3.2 Int Coef 1..4, Int Min AD, Int Max Temp These values characterize the internal temperature sense resistor of the bq20z70. Do not modify this values without consulting TI. Table C-134. Int Coef 1..4, Int Min AD, Int Max Temp Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 106 Temp Model 12 Int Coef 1 signed integer 2 -32768 32767 0 Sec 14 Int Coef 2 0 16 Int Coef 3 -11136 18 Int Coef 4 5754 20 Int Min AD 0 22 Int Max Temp 5754 Related Variables: * none C.12.4 Current (Subclass 107) C.12.4.1 Filter (Offset 0) This constant defines the filter constant used in the AverageCurrent calculation: AverageCurrent new = a * AverageCurrent old + (1 - a) * Current with: a = <Filter> / 256; the time constant = 1 sec/ln(1/a) (default 14.5 sec) Table C-135. Filter Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 107 Current 0 Filter unsigned integer 1 0 255 239 mA Related Variables: * SBS:Current(0x0a) * SBS:AverageCurrent(0x0b) C.12.4.2 Deadband (Offset 1) Any current within Deadband will be reported as 0mA by the SBS Current function. Table C-136. Deadband Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 107 Current 1 Deadband unsigned integer 1 0 255 3 mA Related Variables: * SBS:Current(0x0a) SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 133 www.ti.com DataFlash Values C.12.4.3 CC Deadband (Offset 2) This constant defines the deadband voltage for the measured voltage between SR1 and SR2 pin used for capacity accumulation in units of 290 nV. Any voltages withinCC Deadband does not contribute to capacity accumulation. Table C-137. CC Deadband Subclass ID Subclass Name Offset Name Format Size in Bytes Min Value Max Value Default Value Unit 107 Current 2 CC Deadband unsigned integer 1 0 255 34 290 nV Related Variables: * SBS:RemainingCapacity(0x0f) C.13 DataFlash Values Table C-138. DATAFLASH VALUES 134 Class Subclass ID Subclass Offset Name Data Type Min Value Max Value Default Value Units 1st Level Safety 0 Voltage 0 COV Threshold I2 3700 5000 4300 mV 1st Level Safety 0 Voltage 3 COV Recovery I2 0 4400 3900 mV 1st Level Safety 0 Voltage 12 CUV Threshold I2 0 3500 2200 mV 1st Level Safety 0 Voltage 15 CUV Recovery I2 0 3600 3000 mV 1st Level Safety 1 Current 0 OC (1st Tier) Chg I2 0 20000 6000 mA 1st Level Safety 1 Current 5 OC (1st Tier) Dsg I2 0 20000 6000 mA 1st Level Safety 1 Current 16 Current Recovery Time U1 0 60 8 s 1st Level Safety 1 Current 17 AFE OC Dsg H1 0x00 0x1f 0x12 1st Level Safety 1 Current 18 AFE OC Dsg Time H1 0x00 0xff 0x0f 1st Level Safety 1 Current 21 AFE SC Chg Cfg H1 0x00 0xff 0x77 1st Level Safety 1 Current 22 AFE SC Dsg Cfg H1 0x00 0xff 0x77 1st Level Safety 2 Temperature 0 Over Temp Chg I2 0 1200 550 0.1C 1st Level Safety 2 Temperature 3 OT Chg Recovery I2 0 1200 500 0.1C 1st Level Safety 2 Temperature 5 Over Temp Dsg I2 0 1200 600 0.1C 1st Level Safety 2 Temperature 8 OT Dsg Recovery I2 0 1200 550 0.1C 2nd Level Safety 16 Voltage 0 SOV Threshold I2 0 20000 18000 mV 2nd Level Safety 16 Voltage 2 SOV Time U1 0 30 0 s 2nd Level Safety 16 Voltage 3 Cell Imbalance Current I1 0 200 5 mA 2nd Level Safety 16 Voltage 4 Cell Imbalance Fail Voltage I2 0 5000 1000 mV 2nd Level Safety 16 Voltage 6 Cell Imbalance Time U1 0 30 0 s 2nd Level Safety 16 Voltage 7 Battery Rest Time U2 0 65535 1800 s 2nd Level Safety 16 Voltage 9 PFIN Detect Time U1 0 30 0 s 2nd Level Safety 17 Current 0 SOC Chg I2 0 30000 10000 mA 2nd Level Safety 17 Current 2 SOC Chg Time U1 0 30 0 s 2nd Level Safety 17 Current 3 SOC Dsg I2 0 30000 10000 mA 2nd Level Safety 17 Current 5 SOC Dsg Time U1 0 30 0 s 2nd Level Safety 18 Temperature 0 SOT Chg I2 0 1200 650 0.1C 2nd Level Safety 18 Temperature 2 SOT Chg Time U1 0 30 0 s 2nd Level Safety 18 Temperature 3 SOT Dsg I2 0 1200 750 0.1C 2nd Level Safety 18 Temperature 5 SOT Dsg Time U1 0 30 0 s 2nd Level Safety 19 FET Verification 2 FET Fail Time U1 0 30 0 s 2nd Level Safety 20 AFE Verification 1 AFE Fail Limit U1 0 255 10 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com DataFlash Values Table C-138. DATAFLASH VALUES (continued) Class Subclass ID Subclass Offset Name Data Type Min Value Max Value Default Value Units Charge Control 32 Charge Inhibit Cfg 0 Chg Inhibit Temp Low I2 -400 1200 0 0.1C Charge Control 32 Charge Inhibit Cfg 2 Chg Inhibit Temp High I2 -400 1200 450 0.1C Charge Control 33 Pre-Charge Cfg 0 Pre-chg Current I2 0 2000 250 mA Charge Control 33 Pre-Charge Cfg 2 Pre-chg Temp I2 -400 1200 120 0.1C Charge Control 33 Pre-Charge Cfg 4 Pre-chg Voltage I2 0 20000 3000 mV Charge Control 33 Pre-Charge Cfg 6 Recovery Voltage I2 0 20000 3100 mV Charge Control 34 Fast Charge Cfg 0 Fast Charge Current I2 0 10000 4000 mA Charge Control 34 Fast Charge Cfg 2 Charging Voltage I2 0 20000 16800 mV Charge Control 34 Fast Charge Cfg 6 Suspend Low Temp I2 -400 1200 -50 0.1C Charge Control 34 Fast Charge Cfg 8 Suspend High Temp I2 -400 1200 550 0.1C Charge Control 36 Termination Cfg. 2 Taper Current I2 0 1000 250 mA Charge Control 36 Termination Cfg. 6 Taper Voltage I2 0 1000 300 mV Charge Control 36 Termination Cfg. 10 TCA Clear % I1 -1 100 95 % Charge Control 36 Termination Cfg. 12 FC Clear % I1 -1 100 98 % Charge Control 37 Cell Balancing Cfg 0 Min Cell Deviation U2 0 65535 1750 s/mAh Charge Control 38 Charging Faults 13 Over Charge Capacity I2 0 4000 300 mAh SBS Configuration 48 Data 0 Rem Cap Alarm I2 0 700 300 mAh SBS Configuration 48 Data 2 Rem Energy Alarm I2 0 1000 432 10mW SBS Configuration 48 Data 4 Rem Time Alarm U2 0 30 10 min SBS Configuration 48 Data 6 Init Battery Mode H2 0x0000 0xffff 0x0081 SBS Configuration 48 Data 8 Design Voltage I2 7000 18000 14400 SBS Configuration 48 Data 10 Spec Info H2 0x0000 0xffff 0x0031 SBS Configuration 48 Data 12 Manuf Date U2 0 65535 0 SBS Configuration 48 Data 14 Ser. Num. H2 0x0000 0xffff 0x0001 SBS Configuration 48 Data 16 Cycle Count U2 0 65535 0 Count SBS Configuration 48 Data 18 CC Threshold I2 100 32767 4400 mAh SBS Configuration 48 Data 21 CF MaxError Limit U1 0 100 100 % SBS Configuration 48 Data 22 Design Capacity I2 0 65535 4400 mAh SBS Configuration 48 Data 24 Design Energy I2 0 65535 6336 10mWh SBS Configuration 48 Data 26 Manuf Name S12 Texas Inst. SBS Configuration 48 Data 38 Device Name S8 bq20z70 SBS Configuration 48 Data 46 Device Chemistry S5 SBS Configuration 49 Configuration 0 TDA Set % I1 -1 100 6 % SBS Configuration 49 Configuration 1 TDA Clear % I1 -1 100 8 % SBS Configuration 49 Configuration 2 FD Set % I1 -1 100 2 % SBS Configuration 49 Configuration 3 FD Clear % I1 -1 100 5 % SBS Configuration 49 Configuration 4 TDA Set Volt Threshold I2 0 16800 5000 mV SBS Configuration 49 Configuration 6 TDA Set Volt Time U1 0 60 0 s SBS Configuration 49 Configuration 7 TDA Clear Volt I2 0 16800 5500 mV System Data 58 Manufacturer Info 0 Manuf. Info S9 Configuration 64 Registers 0 Operation Cfg A H2 0x0000 0x033b 0x0329 Configuration 64 Registers 2 Operation Cfg B H2 0x0000 0x3eff 0x2440 Configuration 64 Registers 4 Operation Cfg C H2 0x0000 0x0001 0x0000 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback mV Day + Mo*32 + (Yr 1980)*25 6 LION 12345678 Data Flash 135 www.ti.com DataFlash Values Table C-138. DATAFLASH VALUES (continued) 136 Class Subclass ID Subclass Offset Name Data Type Min Value Max Value Default Value Configuration 64 Registers 6 Permanent Fail Cfg H2 0x0000 0x4dff 0x0000 Configuration 64 Registers 8 Non-Removable Cfg H2 0x0000 0x3027 0x0000 Power 68 Power 0 Flash Update OK Voltage I2 6000 20000 7500 mV Power 68 Power 2 Shutdown Voltage I2 5000 20000 7000 mV Power 68 Power 5 Charger Present I2 0 23000 3000 mV Power 68 Power 16 Wake Current Reg H1 0x00 0xff 0x00 Gas Gauging 80 IT Cfg 0 Load Select U1 0 255 3 Gas Gauging 80 IT Cfg 1 Load Mode U1 0 255 0 Gas Gauging 80 IT Cfg 45 Term Voltage I2 -32768 32767 12000 mV Gas Gauging 80 IT Cfg 60 User Rate-mA I2 2000 9000 0 MilliAmp Gas Gauging 80 IT Cfg 62 User Rate-mW I2 3000 14000 0 10mW Gas Gauging 80 IT Cfg 64 Reserve Cap-mAh I2 0 9000 0 mAh Gas Gauging 80 IT Cfg 66 Reserve Cap-mWh I2 0 14000 0 10mWh Gas Gauging 81 Current Thresholds 0 Dsg Current Threshold I2 0 2000 50 mA Gas Gauging 81 Current Thresholds 2 Chg Current Threshold I2 0 2000 25 mA Gas Gauging 81 Current Thresholds 4 Quit Current I2 0 1000 10 mA Gas Gauging 82 State 0 Qmax Cell0 I2 0 32767 4400 mAh Gas Gauging 82 State 2 Qmax Cell1 I2 0 32767 4400 mAh Gas Gauging 82 State 4 Qmax Cell2 I2 0 32767 4400 mAh Gas Gauging 82 State 6 Qmax Cell3 I2 0 32767 4400 mAh Gas Gauging 82 State 8 Qmax Pack I2 0 32767 4400 mAh Gas Gauging 82 State 12 Update Status H1 0x0 0x3 0x0 Gas Gauging 82 State 25 Delta Voltage I2 -32768 32767 0 Ra Table 88 R_a0 0 Cell0 R_a flag H2 0x0000 0x0000 0xff55 Ra Table 88 R_a0 2 Cell0 R_a 0 I2 183 183 160 2^-10ohm Ra Table 88 R_a0 4 Cell0 R_a 1 I2 181 181 166 2^-10ohm Ra Table 88 R_a0 6 Cell0 R_a 2 I2 198 198 153 2^-10ohm Ra Table 88 R_a0 8 Cell0 R_a 3 I2 244 244 151 2^-10ohm Ra Table 88 R_a0 10 Cell0 R_a 4 I2 254 254 145 2^-10ohm Ra Table 88 R_a0 12 Cell0 R_a 5 I2 261 261 152 2^-10ohm Ra Table 88 R_a0 14 Cell0 R_a 6 I2 333 333 176 2^-10ohm Ra Table 88 R_a0 16 Cell0 R_a 7 I2 338 338 204 2^-10ohm Ra Table 88 R_a0 18 Cell0 R_a 8 I2 345 345 222 2^-10ohm Ra Table 88 R_a0 20 Cell0 R_a 9 I2 350 350 254 2^-10ohm Ra Table 88 R_a0 22 Cell0 R_a 10 I2 382 382 315 2^-10ohm Ra Table 88 R_a0 24 Cell0 R_a 11 I2 429 429 437 2^-10ohm Ra Table 88 R_a0 26 Cell0 R_a 12 I2 502 502 651 2^-10ohm Ra Table 88 R_a0 28 Cell0 R_a 13 I2 545 545 1001 2^-10ohm Ra Table 88 R_a0 30 Cell0 R_a 14 I2 366 366 1458 2^-10ohm Ra Table 89 R_a1 0 Cell1 R_a flag H2 0x0 0x0 0xff55 Ra Table 89 R_a1 2 Cell1 R_a 0 I2 183 183 160 2^-10ohm Ra Table 89 R_a1 4 Cell1 R_a 1 I2 181 181 166 2^-10ohm Ra Table 89 R_a1 6 Cell1 R_a 2 I2 198 198 153 2^-10ohm Ra Table 89 R_a1 8 Cell1 R_a 3 I2 244 244 151 2^-10ohm Ra Table 89 R_a1 10 Cell1 R_a 4 I2 254 254 145 2^-10ohm Ra Table 89 R_a1 12 Cell1 R_a 5 I2 261 261 152 2^-10ohm Ra Table 89 R_a1 14 Cell1 R_a 6 I2 333 333 176 2^-10ohm Data Flash Units mV SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com DataFlash Values Table C-138. DATAFLASH VALUES (continued) Class Subclass ID Subclass Offset Name Data Type Min Value Max Value Default Value Units Ra Table 89 R_a1 16 Cell1 R_a 7 I2 338 338 204 2^-10ohm Ra Table 89 R_a1 18 Cell1 R_a 8 I2 345 345 222 2^-10ohm Ra Table 89 R_a1 20 Cell1 R_a 9 I2 350 350 254 2^-10ohm Ra Table 89 R_a1 22 Cell1 R_a 10 I2 382 382 315 2^-10ohm Ra Table 89 R_a1 24 Cell1 R_a 11 I2 429 429 437 2^-10ohm Ra Table 89 R_a1 26 Cell1 R_a 12 I2 502 502 651 2^-10ohm Ra Table 89 R_a1 28 Cell1 R_a 13 I2 545 545 1001 2^-10ohm Ra Table 89 R_a1 30 Cell1 R_a 14 I2 366 366 1458 2^-10ohm Ra Table 90 R_a2 0 Cell2 R_a flag H2 0x0000 0x0000 0xff55 Ra Table 90 R_a2 2 Cell2 R_a 0 I2 183 183 160 2^-10ohm Ra Table 90 R_a2 4 Cell2 R_a 1 I2 181 181 166 2^-10ohm Ra Table 90 R_a2 6 Cell2 R_a 2 I2 198 198 153 2^-10ohm Ra Table 90 R_a2 8 Cell2 R_a 3 I2 244 244 151 2^-10ohm Ra Table 90 R_a2 10 Cell2 R_a 4 I2 254 254 145 2^-10ohm Ra Table 90 R_a2 12 Cell2 R_a 5 I2 261 261 152 2^-10ohm Ra Table 90 R_a2 14 Cell2 R_a 6 I2 333 333 176 2^-10ohm Ra Table 90 R_a2 16 Cell2 R_a 7 I2 338 338 204 2^-10ohm Ra Table 90 R_a2 18 Cell2 R_a 8 I2 345 345 222 2^-10ohm Ra Table 90 R_a2 20 Cell2 R_a 9 I2 350 350 254 2^-10ohm Ra Table 90 R_a2 22 Cell2 R_a 10 I2 382 382 315 2^-10ohm Ra Table 90 R_a2 24 Cell2 R_a 11 I2 429 429 437 2^-10ohm Ra Table 90 R_a2 26 Cell2 R_a 12 I2 502 502 651 2^-10ohm Ra Table 90 R_a2 28 Cell2 R_a 13 I2 545 545 1001 2^-10ohm Ra Table 90 R_a2 30 Cell2 R_a 14 I2 366 366 1458 2^-10ohm Ra Table 91 R_a3 0 Cell3 R_a flag H2 0x0000 0x0000 0xff55 Ra Table 91 R_a3 2 Cell3 R_a 0 I2 183 183 160 2^-10ohm Ra Table 91 R_a3 4 Cell3 R_a 1 I2 181 181 166 2^-10ohm Ra Table 91 R_a3 6 Cell3 R_a 2 I2 198 198 153 2^-10ohm Ra Table 91 R_a3 8 Cell3 R_a 3 I2 244 244 151 2^-10ohm Ra Table 91 R_a3 10 Cell3 R_a 4 I2 254 254 145 2^-10ohm Ra Table 91 R_a3 12 Cell3 R_a 5 I2 261 261 152 2^-10ohm Ra Table 91 R_a3 14 Cell3 R_a 6 I2 333 333 176 2^-10ohm Ra Table 91 R_a3 16 Cell3 R_a 7 I2 338 338 204 2^-10ohm Ra Table 91 R_a3 18 Cell3 R_a 8 I2 345 345 222 2^-10ohm Ra Table 91 R_a3 20 Cell3 R_a 9 I2 350 350 254 2^-10ohm Ra Table 91 R_a3 22 Cell3 R_a 10 I2 382 382 315 2^-10ohm Ra Table 91 R_a3 24 Cell3 R_a 11 I2 429 429 437 2^-10ohm Ra Table 91 R_a3 26 Cell3 R_a 12 I2 502 502 651 2^-10ohm Ra Table 91 R_a3 28 Cell3 R_a 13 I2 545 545 1001 2^-10ohm Ra Table 91 R_a3 30 Cell3 R_a 14 I2 366 366 1458 2^-10ohm Ra Table 92 R_a0x 0 xCell0 R_a flag H2 0xffff 0xffff 0xffff Ra Table 92 R_a0x 2 xCell0 R_a 0 I2 183 183 160 2^-10ohm Ra Table 92 R_a0x 4 xCell0 R_a 1 I2 181 181 166 2^-10ohm Ra Table 92 R_a0x 6 xCell0 R_a 2 I2 198 198 153 2^-10ohm Ra Table 92 R_a0x 8 xCell0 R_a 3 I2 244 244 151 2^-10ohm Ra Table 92 R_a0x 10 xCell0 R_a 4 I2 254 254 145 2^-10ohm Ra Table 92 R_a0x 12 xCell0 R_a 5 I2 261 261 152 2^-10ohm Ra Table 92 R_a0x 14 xCell0 R_a 6 I2 333 333 176 2^-10ohm Ra Table 92 R_a0x 16 xCell0 R_a 7 I2 338 338 204 2^-10ohm SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 137 www.ti.com DataFlash Values Table C-138. DATAFLASH VALUES (continued) 138 Class Subclass ID Subclass Offset Name Data Type Min Value Max Value Default Value Units Ra Table 92 R_a0x 18 xCell0 R_a 8 I2 345 345 222 2^-10ohm Ra Table 92 R_a0x 20 xCell0 R_a 9 I2 350 350 254 2^-10ohm Ra Table 92 R_a0x 22 xCell0 R_a 10 I2 382 382 315 2^-10ohm Ra Table 92 R_a0x 24 xCell0 R_a 11 I2 429 429 437 2^-10ohm Ra Table 92 R_a0x 26 xCell0 R_a 12 I2 502 502 651 2^-10ohm Ra Table 92 R_a0x 28 xCell0 R_a 13 I2 545 545 1001 2^-10ohm Ra Table 92 R_a0x 30 xCell0 R_a 14 I2 366 366 1458 2^-10ohm Ra Table 93 R_a1x 0 xCell1 R_a flag H2 0xffff 0xffff 0xffff Ra Table 93 R_a1x 2 xCell1 R_a 0 I2 183 183 160 2^-10ohm Ra Table 93 R_a1x 4 xCell1 R_a 1 I2 181 181 166 2^-10ohm Ra Table 93 R_a1x 6 xCell1 R_a 2 I2 198 198 153 2^-10ohm Ra Table 93 R_a1x 8 xCell1 R_a 3 I2 244 244 151 2^-10ohm Ra Table 93 R_a1x 10 xCell1 R_a 4 I2 254 254 145 2^-10ohm Ra Table 93 R_a1x 12 xCell1 R_a 5 I2 261 261 152 2^-10ohm Ra Table 93 R_a1x 14 xCell1 R_a 6 I2 333 333 176 2^-10ohm Ra Table 93 R_a1x 16 xCell1 R_a 7 I2 338 338 204 2^-10ohm Ra Table 93 R_a1x 18 xCell1 R_a 8 I2 345 345 222 2^-10ohm Ra Table 93 R_a1x 20 xCell1 R_a 9 I2 350 350 254 2^-10ohm Ra Table 93 R_a1x 22 xCell1 R_a 10 I2 382 382 315 2^-10ohm Ra Table 93 R_a1x 24 xCell1 R_a 11 I2 429 429 437 2^-10ohm Ra Table 93 R_a1x 26 xCell1 R_a 12 I2 502 502 651 2^-10ohm Ra Table 93 R_a1x 28 xCell1 R_a 13 I2 545 545 1001 2^-10ohm Ra Table 93 R_a1x 30 xCell1 R_a 14 I2 366 366 1458 2^-10ohm Ra Table 94 R_a2x 0 xCell2 R_a flag H2 0xffff 0xffff 0xffff Ra Table 94 R_a2x 2 xCell2 R_a 0 I2 183 183 160 2^-10ohm Ra Table 94 R_a2x 4 xCell2 R_a 1 I2 181 181 166 2^-10ohm Ra Table 94 R_a2x 6 xCell2 R_a 2 I2 198 198 153 2^-10ohm Ra Table 94 R_a2x 8 xCell2 R_a 3 I2 244 244 151 2^-10ohm Ra Table 94 R_a2x 10 xCell2 R_a 4 I2 254 254 145 2^-10ohm Ra Table 94 R_a2x 12 xCell2 R_a 5 I2 261 261 152 2^-10ohm Ra Table 94 R_a2x 14 xCell2 R_a 6 I2 333 333 176 2^-10ohm Ra Table 94 R_a2x 16 xCell2 R_a 7 I2 338 338 204 2^-10ohm Ra Table 94 R_a2x 18 xCell2 R_a 8 I2 345 345 222 2^-10ohm Ra Table 94 R_a2x 20 xCell2 R_a 9 I2 350 350 254 2^-10ohm Ra Table 94 R_a2x 22 xCell2 R_a 10 I2 382 382 315 2^-10ohm Ra Table 94 R_a2x 24 xCell2 R_a 11 I2 429 429 437 2^-10ohm Ra Table 94 R_a2x 26 xCell2 R_a 12 I2 502 502 651 2^-10ohm Ra Table 94 R_a2x 28 xCell2 R_a 13 I2 545 545 1001 2^-10ohm Ra Table 94 R_a2x 30 xCell2 R_a 14 I2 366 366 1458 2^-10ohm Ra Table 95 R_a3x 0 xCell3 R_a flag H2 0xffff 0xffff 0xffff Ra Table 95 R_a3x 2 xCell3 R_a 0 I2 183 183 160 2^-10ohm Ra Table 95 R_a3x 4 xCell3 R_a 1 I2 181 181 166 2^-10ohm Ra Table 95 R_a3x 6 xCell3 R_a 2 I2 198 198 153 2^-10ohm Ra Table 95 R_a3x 8 xCell3 R_a 3 I2 244 244 151 2^-10ohm Ra Table 95 R_a3x 10 xCell3 R_a 4 I2 254 254 145 2^-10ohm Ra Table 95 R_a3x 12 xCell3 R_a 5 I2 261 261 152 2^-10ohm Ra Table 95 R_a3x 14 xCell3 R_a 6 I2 333 333 176 2^-10ohm Ra Table 95 R_a3x 16 xCell3 R_a 7 I2 338 338 204 2^-10ohm Ra Table 95 R_a3x 18 xCell3 R_a 8 I2 345 345 222 2^-10ohm Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com DataFlash Values Table C-138. DATAFLASH VALUES (continued) Class Subclass ID Subclass Offset Name Data Type Min Value Max Value Default Value Units Ra Table 95 R_a3x 20 xCell3 R_a 9 I2 350 350 254 2^-10ohm Ra Table 95 R_a3x 22 xCell3 R_a 10 I2 382 382 315 2^-10ohm Ra Table 95 R_a3x 24 xCell3 R_a 11 I2 429 429 437 2^-10ohm Ra Table 95 R_a3x 26 xCell3 R_a 12 I2 502 502 651 2^-10ohm Ra Table 95 R_a3x 28 xCell3 R_a 13 I2 545 545 1001 2^-10ohm Ra Table 95 R_a3x 30 xCell3 R_a 14 I2 366 366 1458 2^-10ohm PF Status 96 Device Status Data 0 PF Flags 1 H2 0x0000 0x4dff 0x0000 PF Status 96 Device Status Data 28 PF Flags 2 H2 0x0000 0x0dff 0x0000 Calibration 104 Data 0 CC Gain F4 0.1 4 0.9419 Calibration 104 Data 4 CC Delta F4 29826 119304 6 280932.6 25 Calibration 104 Data 8 Ref Voltage I2 0 32767 24500 50uV Calibration 104 Data 12 AFE Pack Gain I2 0 32767 22050 V/cnt Calibration 104 Data 14 CC Offset I2 -32768 32767 -1667 Calibration 104 Data 16 Board Offset I2 -32768 32767 0 Calibration 104 Data 18 Int Temp Offset I1 -128 127 0 Calibration 104 Data 19 Ext1 Temp Offset I1 -128 127 0 Calibration 104 Data 20 Ext2 Temp Offset I1 -128 127 0 Calibration 105 Config 0 CC Current I2 0 32767 3000 mA Calibration 105 Config 2 Voltage Signal I2 0 32767 16800 mV Calibration 105 Config 4 Temp Signal I2 0 32767 2980 0.1C Calibration 105 Config 6 CC Offset Time U2 0 65535 250 s Calibration 105 Config 8 ADC Offset Time U2 0 65535 32 s Calibration 105 Config 10 CC Gain Time U2 0 65535 250 s Calibration 105 Config 12 Voltage Time U2 0 65535 1984 ms Calibration 105 Config 14 Temperature Time U2 0 65535 32 s Calibration 105 Config 17 Cal Mode Timeout U2 0 65535 38400 1/128 s Calibration 106 Temp Model 0 Ext Coef 1 I2 -32768 32767 -28285 s Calibration 106 Temp Model 2 Ext Coef 2 I2 -32768 32767 20848 s Calibration 106 Temp Model 4 Ext Coef 3 I2 -32768 32767 -7537 s Calibration 106 Temp Model 6 Ext Coef 4 I2 -32768 32767 4012 s Calibration 106 Temp Model 8 Ext Min AD I2 -32768 32767 0 s Calibration 106 Temp Model 10 Ext Max Temp I2 -32768 32767 4012 s Calibration 106 Temp Model 12 Int Coef 1 I2 -32768 32767 0 s Calibration 106 Temp Model 14 Int Coef 2 I2 -32768 32767 0 s Calibration 106 Temp Model 16 Int Coef 3 I2 -32768 32767 -11136 s Calibration 106 Temp Model 18 Int Coef 4 I2 -32768 32767 5754 s Calibration 106 Temp Model 20 Int Min AD I2 -32768 32767 0 s Calibration 106 Temp Model 22 Int Max Temp I2 -32768 32767 5754 s Calibration 107 Current 0 Filter U1 0 255 239 Calibration 107 Current 1 Deadband U1 0 255 3 mA Calibration 107 Current 2 CC Deadband U1 0 255 34 294 nV SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Data Flash 139 www.ti.com DataFlash Values 140 Data Flash SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Appendix D SLUU250A - June 2006 - Revised June 2006 Glossaryreferences to non-existent LED, POV, and PUV features. ADC Analog to Digital Converter AFE Analog Front End bit a single bit in a SBS command or Dataflash value which can be changed by user CC Coulomb Counter CHG FET charge FET, connected to CHG pin of bq29330; used by bq29330 to enable or disable charging COV Cell Over Voltage CPU Central Processing Unit CUV Cell Under Voltage DF DSG DSG FET FAS FC FCHG FCTMO Dataflash flag set by bq20z70 to indicate charge (DSG= 0) or discharge (DSG=1) discharge FET, connected to DSG pin of bq29330; used by bq29330 to enable or disable discharging Full Access Security Fully Charged Fast Charge Fast Charge Timeout FD Fully Discharged flag a single bit in a SBS command or Dataflash value which is set by bq20z70 or bq29330 and indicates a status change IC Li-Ion Integrated Circuit Lithium-Ion NR Non Removable OC Over Current OCA Over Charge Alarm OCV Open Circuit Voltage OTC Over Temperature Charging OTD Over Temperature Discharging PCHG PEC PF Pre-Charge Packet Error Checking Permanent Fail SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Glossary 141 www.ti.com Appendix D PRES System Present Flag Qmax Maximum Chemical Capacity RCA Remaining Capacity Alarm RSOC RelativeStateOfCharge SBS Smart Battery System SCC Short Circuit Charge SCD Short Circuit Discharge SMBus SOC Safety Over Current SOT Safety Over Temperature SS Terminate Charge Alarm TDA Terminate Discharge Alarm XDSG Glossary Sealed mode flag TCA ZVCHG FET 142 System Management Bus pre- charge FET, connected to ZVCHG pin of bq29330; depending on configuration it is used for pre charging and/or zero volt charging Discharge Fault flag SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback www.ti.com Revision History Revision History Changes from Original (June 2006) to A Revision ......................................................................................................... Page * * * * * * * * * * * * * * * * * * * * * Deleted references to non-existent LED, POV, and PUV features. ................................................................ 6 Changed Suspend Temp Low offset .................................................................................................. 34 Changed Suspend Temp High offset ................................................................................................. 34 Deleted reference to non-existent [PUV] flag ........................................................................................ 35 Deleted reference to non-existent TCA Set% and FC Set% dataflash values. .................................................. 36 Deleted reference to non-existent Maintenance Current dataflash values. ...................................................... 36 Deleted references to TCA Set% and FC Set% ..................................................................................... 37 Changed CF Max Error Limit offset value from (19) to (20)........................................................................ 53 Changed the OC Discharge recovery threshold value .............................................................................. 82 Changed FET Fail Time offset ......................................................................................................... 92 Deleted reference to non-existent Temp Hys dataflash value ..................................................................... 94 Changed Suspend Temp Low offset from 8 to 6 .................................................................................... 96 Changed Suspend Temp High offset from 10 to 8 .................................................................................. 97 Changed reference from non-existent AFE_P flag to RSVD flag. ............................................................... 127 Deleted non-existent AFE Corr (Offset 10) dataflash value description. ........................................................ 128 Changed Int Temp Offset from 17 to 18. ............................................................................................ 129 Changed Ext1 Temp Offset from 18 to 19. ......................................................................................... 129 Changed Ext2 Temp Offset from 19 to 20. ......................................................................................... 130 Deleted references to non-existent LED, POV, and PUV features. ............................................................. 141 Deleted references to non-existent LED, POV, and PUV features. ............................................................. 142 Deleted references to non-existent LED, POV, and PUV features. ............................................................. 143 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Glossary 143 Index SLUU250A - June 2006 - Revised June 2006 Index 1st Level Protection 9 2nd Level Permanent Failure Actions 19 2nd Level Protection 18 2nd Level Protection IC Input 20 A AbsoluteStateOfCharge 57 ADC Offset Time 131 AFE_C 69, 127 AFE Communication Fault 21 AFEData 67 AFE Fail Limit 93 AFE OC Dsg 82 AFE OC Dsg Recovery 83 AFE OC Dsg Time 83 AFE Pack Gain 128 AFE SC Chg Cfg 83 AFE SC Dsg Cfg 84 AFE SC Recovery 84 AFE Watchdog 18 ALARM_MODE 53 AM 53 AOCD 69, 111 AtRate 53 AtRateOK 55 AtRateTimeToEmpty 54 AtRateTimeToFull 54 AuthenKey0 73 AuthenKey1 73 AuthenKey2 72 AuthenKey3 72 Authenticate 65 AverageCurrent 56 AverageTimeToEmpty 58 AverageTimeToFull 59 AverageVoltage 71 B BatteryMode 51 Battery Pack Removed 39 Battery Rest Time 89 BatteryStatus 60 BCAST 109 Board Offset 129 BootRom 49 C Calibration Mode 48 144 Revision History Cal Mode Timeout 132 CAPACITY_MODE 51 CAPM 51 CB 70 CC 53 CC0 106 CC1 106 CC Current 130 CC Deadband 134 CC Delta 128 CC Gain 127 CC Gain Time 131 CC Offset 128 CC Offset Time 130 CC Threshold 101 Cell0 R_a 0 119 Cell0 R_a 1 119 Cell0 R_a 2 119 Cell0 R_a 3 119 Cell0 R_a 4 119 Cell0 R_a 5 119 Cell0 R_a 6 119 Cell0 R_a 7 119 Cell0 R_a 8 119 Cell0 R_a 9 119 Cell0 R_a 10 119 Cell0 R_a 11 119 Cell0 R_a 12 119 Cell0 R_a 13 119 Cell0 R_a 14 119 Cell0 R_a flag 118 Cell1 R_a 0 120 Cell1 R_a 1 120 Cell1 R_a 2 120 Cell1 R_a 3 120 Cell1 R_a 4 120 Cell1 R_a 5 120 Cell1 R_a 6 120 Cell1 R_a 7 120 Cell1 R_a 8 120 Cell1 R_a 9 120 Cell1 R_a 10 120 Cell1 R_a 11 120 Cell1 R_a 12 120 Cell1 R_a 13 120 Cell1 R_a 14 120 Cell1 R_a flag 119 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Revision History Cell2 R_a 0 121 Cell2 R_a 1 121 Cell2 R_a 2 121 Cell2 R_a 3 121 Cell2 R_a 4 121 Cell2 R_a 5 121 Cell2 R_a 6 121 Cell2 R_a 7 121 Cell2 R_a 8 121 Cell2 R_a 9 121 Cell2 R_a 10 121 Cell2 R_a 11 121 Cell2 R_a 12 121 Cell2 R_a 13 121 Cell2 R_a 14 121 Cell2 R_a flag 120 Cell3 R_a 0 122 Cell3 R_a 1 122 Cell3 R_a 2 122 Cell3 R_a 3 122 Cell3 R_a 4 122 Cell3 R_a 5 122 Cell3 R_a 6 122 Cell3 R_a 7 122 Cell3 R_a 8 122 Cell3 R_a 9 122 Cell3 R_a 10 122 Cell3 R_a 11 122 Cell3 R_a 12 122 Cell3 R_a 13 122 Cell3 R_a 14 122 Cell3 R_a flag 121 Cell Balancing 29 Cell Imbalance Current 88 Cell Imbalance Fail Voltage 88 Cell Imbalance Fault 19 Cell Imbalance Time 88 Cell Overvoltage 9 Cell Undervoltage 9 CellVoltage1 65 CellVoltage2 65 CellVoltage3 65 CellVoltage4 65 CF 53 CFETF 69, 127 CF Max Error Limit 101 CHARGE_CONTROLLER 53 Charge Alarm 37 Charge Control 27 Charge Control SMBus Broadcasts 29 Charge Inhibit 30 Charge Overcurrent 12 CHARGER_MODE 51 Charger Present 112 Charge Suspend 32 ChargingCurrent 59 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Charging Faults 36 ChargingStatus 70 ChargingVoltage 59, 96 Chemistry ID 47 CHG 68 Chg Current Threshold 116 CHGFET 108 CHG FET Fault 20 CHGIN 108 Chg Inhibit Temp High 93 Chg Inhibit Temp Low 93 CHGM 51 Chg Mode 23 CHGSUSP 70, 108 CHGTERM 107 CIM 69, 127 Clearing Permanent Failure 22 CONDITION_FLAG 53 COV 69 COV Recovery 80 COV Threshold 79 CPE 109 CSV 70 CSYNC 107 Current 55 Current Recovery Time 82 CUV 69 CUV Recovery 80 CUV Threshold 80 CycleCount 61, 101 D DataFlashSubClassID 74 DataFlashSubClassPage1 DataFlashSubClassPage2 DataFlashSubClassPage3 DataFlashSubClassPage4 DataFlashSubClassPage5 DataFlashSubClassPage6 DataFlashSubClassPage7 DataFlashSubClassPage8 Deadband 133 Delta Voltage 118 DesignCapacity 61, 101 Design CapaEnergy 102 DesignVoltage 62, 100 DeviceChemistry 64, 103 DeviceName 64, 102 Device Type 45 DF Checksum 46 DFETF 69, 127 DFF 69, 127 DF Failure 21 Discharge Alarm 37 Discharge Overcurrent 12 DSG 68, 70 74 74 74 74 74 74 74 74 Index 145 Revision History Dsg Current Threshold 116 DSG FET Fault 20 Dsg Mode 23 E EC0 60 EC1 60 EC2 60 EC3 60 Ext1 Temp Offset 129 Ext2 Temp Offset 129 Ext Coef 1 132 Ext Coef 2 132 Ext Coef 3 132 Ext Coef 4 132 Extended SBS Commands 50, 67 Ext Max Temp 132 Ext Min AD 132 F FAS 70 Fast Charge Current 95 Fast Charge Mode 35 FC 60 FC Clear % 98 FCHG 70 FD 60 FD Cleat % 104 FD Set % 103 FET0 46 FET1 46 FETControl 67 FET Fail Time 92 Filter 133 Firmware Version 45 Flash Update OK Voltage 112 Full Access Device 49 FullAccessKey 72 FullChargeCapacity 58 G Gas Gauging 22 H Hardware Version 45 HPE 109 I ICC 53 Impedance Track 22 INIT 60 Init Battery Mode 99 Int Coef 1 133 Int Coef 2 133 Int Coef 3 133 Int Coef 4 133 INTERNAL_CHARGE_CONTROLLER 53 146 Index Int Max Temp 133 Int Min AD 133 Int Temp Offset 129 IT Enable 48 L LDMD 70 Load Mode 22, 114 Load Select 22, 113 M ManufactureDate 62 ManufacturerAccess 45 ManufacturerData 64 ManufacturerInfo 73 ManufacturerName 63 Manufacturer Status 46 Manuf Date 100 Manuf. Info 105 Manuf Name 102 MaxError 56 MCHG 70 Min Cell Deviation 98 N NCSMB 107 Nonremovable Battery Mode Recovery 13, 16 Non-Removable Cfg 111 nPrecharge Mode 34 NR 108 NRCHG 107 O OC 36, 70, 111 OC (1st Tier) Chg 81 OC (1st Tier) Dsg 82 OCA 60 OCC 69, 111 OC Chg Recovery 81 OCD 69, 111 OC Dsg Recovery 82 OD 68 Operation Cfg A 105 Operation Cfg B 106 OperationStatus 70 OTA 60 OTC 69 OT Chg Recovery 86 OTD 69 OT Dsg Recovery 86 OTFET 108 Overcharge 36 Over Charge Capacity 98 Over Temp Chg 85 Over Temp Dsg 86 Overtemperature Protection 17 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback Revision History P PackVoltage 71 PB 53 PBS 53 PCHG 70 Permanent Fail Cfg 109 Permanent Fail Clear 49 PF 69 PF0 46 PF1 46 PF Flags 1 126 PF Flags 2 127 PFIN 69, 127 PFIN Detect Time 89 PFKey 72 PFStatus 69 Pre-chg Current 94 Pre-chg Temp 94 Pre-chg Voltage 95 PRES 70 PRIMARY_BATTERY 53 PRIMARY_BATTERY_SUPPORT 53 Primary Charge Termination 36 Pulsed Load Compensation 23 Q QEN 70 Qmax 26 Qmax Cell 0 117 Qmax Cell 1 117 Qmax Cell 2 117 Qmax Cell 3 117 Qmax initial values 26 Qmax Pack 117 Qmax Update Condition 26 Quit Current 116 R RCA 60 Recovery Voltage 95 Ref Voltage 128 RelativeStateOfCharge 57 Relaxation Mode 23 RemainingCapacity 57 RemainingCapacityAlarm 50 Rem Cap Alarm 99 Rem Energy Alarm 99 Rem Time Alarm 99 RESCAP 107 Reserve Battery Capacity 23 Reserve Cap-mAh 115 Reserve Cap-mWh 115 Reset 48 ResetData 70 RSOCL 109 RTA 60 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback RunTimeToEmpty 58 S SAFE activation 48 SAFE Cleat 48 Safety Overcurrent Protection 20 Safety Overtemperature Protection 20 Safety Overvoltage Protection 19 SafetyStatus 68 SCC 69, 111 SCD 69, 111 Seal Device 48 SenseResistor 73 SerialNumber 63 Ser. Num. 100 Short-Circuit Protection 16 Shutdown 47 Shutdown Mode 41 Shutdown Voltage 112 Sleep 47, 106 Sleep Mode 39 SOCC 69, 127 SOC Chg 89 SOC Chg Time 90 SOCD 69, 127 SOC Dsg 90 SOC Dsg Time 90 SOTC 69, 127 SOT Chg 91 SOT Chg Time 91 SOTD 69, 127 SOT Dsg 91 SOT Dsg Time 92 SOV 69, 127 SOV Threshold 87 SOV Time 87 SpecificationInfo 62 Spec Info 100 SS 70 Standard Recovery 13, 16 STATE0 47 STATE1 47 STATE2 47 STATE3 47 StateOfHealth 68 Suspend High Temp 96 Suspend Low Temp 96 System Present 39 T Taper Current 97 TCA 60 TCA Clear % 97 TDA 60 TDA Cleat % 103 TDA Set % 103 Index 147 Revision History TDA Set Volt Threshold 104 TDA Set Volt Time 104 TEMP0 106 TEMP1 106 Temperature 55 Temperature Time 132 Temp Signal 130 Termination Voltage 23, 97 Term Voltage 114 U Unseal Device 49 UnSealKey 71 Update Status 117 User Rate-10mW 115 User Rate-mA 114 V VOK 70 Voltage 55 Voltage Signal 130 Voltage Time 131 W WAKE 70 Wake Current Reg 112 Wake Function 40 WDF 69 WDResetData 71 X XAFE_C 110 xCell0 R_a 0 123 xCell0 R_a 1 123 xCell0 R_a 2 123 xCell0 R_a 3 123 xCell0 R_a 4 123 xCell0 R_a 5 123 xCell0 R_a 6 123 xCell0 R_a 7 123 xCell0 R_a 8 123 xCell0 R_a 9 123 xCell0 R_a 10 123 xCell0 R_a 11 123 xCell0 R_a 12 123 xCell0 R_a 13 123 xCell0 R_a 14 123 xCell0 R_a flag 122 xCell1 R_a 0 124 xCell1 R_a 1 124 xCell1 R_a 2 124 xCell1 R_a 3 124 xCell1 R_a 4 124 xCell1 R_a 5 124 xCell1 R_a 6 124 xCell1 R_a 7 124 xCell1 R_a 8 124 148 Index xCell1 R_a 9 124 xCell1 R_a 10 124 xCell1 R_a 11 124 xCell1 R_a 12 124 xCell1 R_a 13 124 xCell1 R_a 14 124 xCell1 R_a flag 123 xCell2 R_a 0 125 xCell2 R_a 1 125 xCell2 R_a 2 125 xCell2 R_a 3 125 xCell2 R_a 4 125 xCell2 R_a 5 125 xCell2 R_a 6 125 xCell2 R_a 7 125 xCell2 R_a 8 125 xCell2 R_a 9 125 xCell2 R_a 10 125 xCell2 R_a 11 125 xCell2 R_a 12 125 xCell2 R_a 13 125 xCell2 R_a 14 125 xCell2 R_a flag 124 xCell3 R_a 0 126 xCell3 R_a 1 126 xCell3 R_a 2 126 xCell3 R_a 3 126 xCell3 R_a 4 126 xCell3 R_a 5 126 xCell3 R_a 6 126 xCell3 R_a 7 126 xCell3 R_a 8 126 xCell3 R_a 9 126 xCell3 R_a 10 126 xCell3 R_a 11 126 xCell3 R_a 12 126 xCell3 R_a 13 126 xCell3 R_a 14 126 xCell3 R_a flag 125 XCFETF 110 XCIM 110 XDFETF 110 XDFF 110 XDSG 70 XPFIN 111 XPFVSHUT 110, 127 XSOCC 110 XSOCD 110 XSOTC 111 XSOTD 110 XSOV 111 Z ZVCHG 68 ZVCHG0 106 ZVCHG1 106 SLUU250A - June 2006 - Revised June 2006 Submit Documentation Feedback IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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