PRODUCTS TYPE RR O H m BU21023MUV mu Silicon monolithic IC 1/4 SEMICONDUCTOR Structure Silicon Monolithic IC Product Name 4-wire resistive touch screen controller IC Product No BU21 023MUV Features 1) 4-wire resistive touch screen interface 2) 3.0V single power supply 3) 4-wire SPI interface / 2-wire serial interface 4) Selectable download way of CPU firmware (Host or EEPROM) 5) Two points and gesture detection @ Absolute maximum rating Parameter Symbol Rating Unit Remarks Power supply voltage VDD 0.3 ~ 45 Vv Voltage applied to pins VIN VSS-0.3 ~ VDD+0.3 Vv Power dissipation Pd 700 mW Storage temperature range Tstg ~50 ~ 125 C *1 This is the power dissipation per IC unit. Reduce to 7.00 mW /C when Ta = 25C or above. @ Operating conditions Parameter Symbol Rating Unit Remarks MIN TYP MAX Power supply VDD 2.70 3.00 3.60 Vv Digital CORE power supply DVDD 1.62 1.80 1.98 Vv DVDD_EXT=H Operating temperature Topr -20 25 85 C This chip is not designed to protect itself against radioactive rays. Status of this document The Japanese version of this document is the formal specification. A customer may use this translation version only for a reference to help reading the formal version. [f there are any differences in translation version of this document, formal version takes priority. Application example - ROHM cannot provide adequate confirmation of patents. + The product described in this specification is designed to be used with ordinary electronic equipment or devices (such as audio-visual equipment, office-automation equipment, communications devices, electrical appliances, and electronic toys). Should you intend to use this product with equipment or devices which require an extremely high level of reliability and the malfunction of which wouid directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. - ROHM assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representations that the circuits are free from patent infringement. DESIGN CHECK ef diye omer | Ryehit DATE : Sep./6/2010 | SPECIFICATION No. : TSZ02201-BU21023MUV -1-2 ANS a po Age Ayr Con: Sap.,6 ,22h Sey. b 29! REV. A ROHM Co.,Ltd. T8Z22111-04+002iQ oO H mM PRODUCTS TYPE PAGE Silicon monolithic IC BU21023MUV 2/4 SEMICONDUCTOR @Electrical characteristics (Ta=25C, VDD=3.00V) Parameter Symbol Rating Unit Remarks MIN TYP MAX Low-level input voltage VIL -0.5 - 0.2xVDD Vv High-level input voltage VIH 0.8xVDD - VDD+0.5 Vv Low-level output voltage VOL ~- - VSS+0.4 Vv High-level output voltage VOH VDD-0.4 - - Vv Stop current Ist - - 1 uA RSTB=L Standby current 1 Iccl - 60 100 uA DVDD_EXT=L Standby current 2 Iec2 - 10 20 uA DVDD_EXT=H Operating current Idd - 4 6 mA Load none OSC frequency Freq 18 20 22 MHz Resolution Ad 1024 x 1024 Bit Differential non line accurate DNL -3.0 - +3.0 LSB Integrate non line accurate INL -3.0 ~ +3.0 LSB @ Package outline drawing (VQFN028V5050) 5,020.1 2,740.2 co. 2 \ t 28 LN 2 ~ U21023 = Cc Ss a CJ ~ 38 a 5 qd; 6 \__Lot No. f . ~ Cl a 2 > Cc C S 222 14 & Moana an T ef is 1PIN MARK 6.0] 0.5 0. 2528-88 * < = oO . NOOO oon ? aa] S sol Ei. 045) * 2 o 8 unit : mm ROHM Co.,Ltd. REV. : A SPECIFICATION No. TSZ02201-BU21023MUV -1-2 18Z22111-05-002PRODUCTS RO H m " Silicon monolithic IC SEMICONDUCTOR TYPE BU21023MUV PAGE 3/4 @ Terminal list No. INT CL.SCK CL N _ anel inte anel Panel est e tor nel voltage Re tor ana k egulator output (for supply digital block or su d | voltage (DVDD_EXT="H i voltage e H= ut , L=Hi-Z volta Groun H reset u external c est pin est pin est pin ese in (L= sPl_|Serila ut Interru SPI hip sele sPl_ [Serial SPI M SDA EEP (#1) Please connect AVDD and DVDD with 1.0uF connected with GND, and use the terminal PVDD with no connection. (*2) DVDD_EXT="L , the terminal DVDD can be supplied digital CORE power supply. (*3) Please pull up the ECL, EDA, and INT by 10k ohm. Please connect T4 with 1.0uF connected with GND. Please connect direct with GND when not use. (*4) When use 2 wire serial interface, please pull up the SCL_SCK, SDA_SI by 10k ohm, and the terminal SO with no connection. (#5) Each constant is a recommended value, and no guarantee value. (*6) It must not RSTB="H when supply VDD voltage. (#7) Please use the terminal NC with no connection. @Block diagram Work memory ae M ECL XP EDA yp I/F (10bit) cpu (bit) | Program YN memory Filter J SEL_CSB CLK_EXT Osc -y Clock register SCL_SCK generator Host \/E SDA_S1 sO Regulator INT tFSEL 2825 882 6 reese a <= a al oe ao a ROHM Co.,Ltd. |rev. A SPECIFICATION No. TSZ02201-BU21023MUV -1-2 T$Z22111+05-002RO H mM PRODUCTS TYPE PAGE Silicon monolithic IC BU21023MUV 4/4 SEMICONDUCTOR @Cautions on use (1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc. (2) Operating conditions These conditions represent a range within which characteristics can be provided approximately as expected. The electrical characteristics are guaranteed under the conditions of each parameter. (3) Reverse connection of power supply connector The reverse connection of power supply connector can break down ICs. Take protective measures against the breakdown due to the reverse connection, such as mounting an external diode between the power supply and the ICs power supply terminal. (4) Power supply line Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines. In this regard, for the digital block power supply and the analog block power supply, even though these power supplies has the same level of potential, separate the power supply pattern for the digital block from that for the analog block, thus suppressing the diffraction of digital noises to the analog block power supply resulting from impedance common to the wiring patterns. For the GND line, give consideration to design the patterns in a similar manner. Furthermore, for all power supply terminals to ICs, mount a capacitor between the power supply and the GND terminal. At the same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of the capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant. (5) GND voltage Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric transient. (6) Short circuit between terminals and erroneous mounting In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the GND terminal, the ICs can break down. (7) Operation in strong electromagnetic field Be noted that using ICs in the strong electromagnetic field can malfunction them. (8) Inspection with set PCB On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress. Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to the jig. After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In addition, for protection against static electricity, establish a ground for the assembly process and pay thorough attention to the transportation and the storage of the set PCB. (9) Input terminals In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal. Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. (10) Ground wiring pattern If small-signal GND and large-current GND are provided, It will be recommended to separate the large~current GND pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB so that resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of the small-signal GND. Pay attention not to cause fluctuations in the GND wiring pattern of external parts as well. (11) External capacitor In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc. (12) Rush current The IC with some power supplies has a capable of rush current due to procedure and delay at power-on. Pay attention to the capacitance of the coupling condensers and the wiring pattern width and routing of the power supply and the GND lines. (13) Others In case of use this LSI, please peruse some other detail documents, we called, Technical note, Functional description, Application note. ROHM Co.,Ltd./rev. : A SPECIFICATION No. : 1SZ02201-BU21023MUV -1-2 T8Z2211105-002