Features * Medium-voltage and Standard-voltage Operation * * * * * * * - 5.0(VCC = 4.5V to 5.5V) - 2.7 (VCC = 2.7V to 5.5V) User-selectable Internal Organization - 2K: 256 x 8 or 128 x 16 - 4K: 512 x 8 or 256 x 16 Three-wire Serial Interface Sequential Read Operation 2 MHz Clock Rate (5V) Self-timed Write Cycle (10 ms max) High Reliability - Endurance: 1 Million Write Cycles - Data Retention: 100 Years 8-lead PDIP and 8-lead JEDEC SOIC Packages Three-wire Serial Automotive EEPROMs Description The AT93C56A/66A provides 2048/4096 bits of serial electrically erasable programmable read-only memory (EEPROM). The EEPROM is organized as 128/256 words of 16 bits each (when the ORG pin is connected to VCC) and 256/512 words of 8 bits each (when the ORG pin is tied to ground.) The device is optimized for use in many automotive applications where low-power and low-voltage operations are essential. The AT93C56A/66A is available in space-saving 8-lead PDIP and 8-lead JEDEC SOIC packages. The AT93C56A/66A is enabled through the Chip Select (CS) pin and accessed via a three-wire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock (SK). Upon receiving a Read instruction at DI, the address is decoded and the data is clocked out serially on the data output pin DO. The write cycle is completely self-timed, and no separate erase cycle is required before write. The write cycle is only enabled when the part is in the Erase/Write Enable state. When CS is brought high following the initiation of a write cycle, the DO pin outputs the Ready/Busy status of the part. 2K (256 x 8 or 128 x 16) 4K (512 x 8 or 256 x 16) AT93C56A AT93C66A Preliminary The AT93C56A/66A is available in 4.5V to 5.5V and 2.7V to 5.5V versions. Table 1. Pin Configurations Pin Name Function CS Chip Select SK Serial Data Clock DI Serial Data Input DO Serial Data Output GND Ground VCC Power Supply ORG Internal Organization DC Don't Connect 8-lead PDIP CS SK DI DO 1 2 3 4 8 7 6 5 VCC DC ORG GND 8-lead SOIC CS SK DI DO 1 2 3 4 8 7 6 5 VCC DC ORG GND 3403D-SEEPR-10/04 1 Absolute Maximum Ratings* Operating Temperature......................................-55C to +125C *NOTICE: Storage Temperature .........................................-65C to +150C Voltage on Any Pin with Respect to Ground ........................................ -1.0V to +7.0V Maximum Operating Voltage .......................................... 6.25V Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability DC Output Current........................................................ 5.0 mA Figure 1. Block Diagram MEMORY ARRAY 256/512 x 8 OR 128/256 X 16 ADDRESS DECODER DATA REGISTER OUTPUT BUFFER MODE DECODE LOGIC CLOCK GENERATOR Note: 2 When the ORG pin is connected to VCC, the "x 16" organization is selected. When it is connected to ground, the "x 8" organization is selected. If the ORG pin is left unconnected and the application does not load the input beyond the capability of the internal 1 Meg ohm pullup, then the "x 16" organization is selected. AT93C56A/66A [Preliminary] 3403D-SEEPR-10/04 AT93C56A/66A [Preliminary] Table 1. Pin Capacitance(1) Applicable over recommended operating range from TA = 25C, f = 1.0 MHz, VCC = +5.0V (unless otherwise noted) Symbol Test Conditions COUT CIN Note: Max Units Conditions Output Capacitance (DO) 5 pF VOUT = 0V Input Capacitance (CS, SK, DI) 5 pF VIN = 0V 1. This parameter is characterized and is not 100% tested. Table 2. DC Characteristics Applicable over recommended operating range from: TA = -40C to +125C, VCC = +2.7V to +5.5V (unless otherwise noted) Symbol Parameter VCC1 Supply Voltage VCC2 Supply Voltage ICC Supply Current ISB1 Standby Current ISB2 Test Condition Min Typ Max Unit 2.7 5.5 V 4.5 5.5 V READ at 1.0 MHz 0.5 2.0 mA WRITE at 1.0 MHz 0.5 2.0 mA VCC = 2.7V CS = 0V 6.0 10.0 A Standby Current VCC = 5.0V CS = 0V 17 30 A IIL Input Leakage VIN = 0V to VCC 0.1 3.0 A IOL Output Leakage VIN = 0V to VCC 0.1 3.0 A VIL1(1) VIH1(1) Input Low Voltage Input High Voltage 2.7V VCC 5.5V 0.8 VCC + 1 V VOL1 VOH1 Output Low Voltage Output High Voltage 2.7V VCC 5.5V 0.4 V Note: VCC = 5.0V -0.6 2.0 IOL = 2.1 mA IOH = -0.4 mA 2.4 V 1. VIL min and VIH max are reference only and are not tested. 3 3403D-SEEPR-10/04 Table 3. AC Characteristics Applicable over recommended operating range from TA = -40C to + 125C, VCC = As Specified, CL = 1 TTL Gate and 100 pF (unless otherwise noted). Symbol Parameter Test Condition fSK SK Clock Frequency 4.5V VCC 5.5V 2.7V VCC 5.5V 0 0 tSKH SK High Time 4.5V VCC 5.5V 2.7V VCC 5.5V 250 250 ns tSKL SK Low Time 4.5V VCC 5.5V 2.7V VCC 5.5V 250 250 ns tCS Minimum CS Low Time 4.5V VCC 5.5V 2.7V VCC 5.5V 250 250 ns tCSS CS Setup Time Relative to SK 4.5V VCC 5.5V 2.7V VCC 5.5V 50 50 ns tDIS DI Setup Time Relative to SK 4.5V VCC 5.5V 2.7V VCC 5.5V 100 100 ns tCSH CS Hold Time Relative to SK 0 ns tDIH DI Hold Time Relative to SK 4.5V VCC 5.5V 2.7V VCC 5.5V 100 100 ns tPD1 Output Delay to `1' AC Test 4.5V VCC 5.5V 2.7V VCC 5.5V 250 500 ns tPD0 Output Delay to `0' AC Test 4.5V VCC 5.5V 2.7V VCC 5.5V 250 500 ns tSV CS to Status Valid AC Test 4.5V VCC 5.5V 2.7V VCC 5.5V 250 250 ns tDF CS to DO in High Impedance AC Test CS = VIL 4.5V VCC 5.5V 2.7V VCC 5.5V 100 150 ns tWP Write Cycle Time 10 ms Endurance(1) Note: 4 Min 2.7V VCC 5.5V 5.0V, 25C 0.1 1M Typ 3 Max Units 2 1 MHz Write Cycles 1. This parameter is characterized and is not 100% tested. AT93C56A/66A [Preliminary] 3403D-SEEPR-10/04 AT93C56A/66A [Preliminary] Table 4. Instruction Set for the AT93C56A and AT93C66A Address Data SB Op Code x8 x 16 READ 1 10 A8 - A 0 A7 - A 0 EWEN 1 00 11XXXXXXX 11XXXXXX ERASE 1 11 A8 - A 0 A7 - A 0 WRITE 1 01 A8 - A 0 A7 - A 0 ERAL 1 00 10XXXXXXX 10XXXXXX WRAL 1 00 01XXXXXXX 01XXXXXX EWDS 1 00 00XXXXXXX 00XXXXXX Instruction Note: x8 x 16 Comments Reads data stored in memory, at specified address Write enable must precede all programming modes Erases memory location An - A0 D7 - D 0 D 15 - D0 Writes memory location An - A0 Erases all memory locations. Valid only at VCC = 4.5V to 5.5V. D7 - D0 D15 - D0 Writes all memory locations. Valid only at V CC = 5.0V 10% and Disable Register cleared. Disables all programming instructions. The Xs in the address field represent don't care values and must be clocked. Functional Description The AT93C56A/66A is accessed via a simple and versatile three-wire serial communication interface. Device operation is controlled by seven instructions issued by the host processor. A valid instruction starts with a rising edge of CS and consists of a Start Bit (logic "1") followed by the appropriate Op Code and the desired memory Address location. READ (READ): The Read (READ) instruction contains the Address code for the memory location to be read. After the instruction and address are decoded, data from the selected memory location is available at the serial output pin DO. Output data changes are synchronized with the rising edges of serial clock SK. It should be noted that a dummy bit (logic "0") precedes the 8- or 16-bit data output string. The AT93C56A/66A supports sequential read operations. The device will automatically increment the internal address pointer and clock out the next memory location as long as Chip Select (CS) is held high. In this case, the dummy bit (logic "0") will not be clocked out between memory locations, thus allowing for a continuous stream of data to be read. ERASE/WRITE (EWEN): To assure data integrity, the part automatically goes into the Erase/Write Disable (EWDS) state when power is first applied. An Erase/Write Enable (EWEN) instruction must be executed first before any programming instructions can be carried out. Please note that once in the Erase/Write Enable state, programming remains enabled until an Erase/Write Disable (EWDS) instruction is executed or VCC power is removed from the part. ERASE (ERASE): The Erase (ERASE) instruction programs all bits in the specified memory location to the logical "1" state. The self-timed erase cycle starts once the ERASE instruction and address are decoded. The DO pin outputs the Ready/Busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (tCS). A logic "1" at pin DO indicates that the selected memory location has been erased, and the part is ready for another instruction. 5 3403D-SEEPR-10/04 WRITE (WRITE): The Write (WRITE) instruction contains the 8 or 16 bits of data to be written into the specified memory location. The self-timed programming cycle, tWP, starts after the last bit of data is received at serial data input pin DI. The DO pin outputs the Ready/Busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (tCS). A logic "0" at DO indicates that programming is still in progress. A logic "1" indicates that the memory location at the specified address has been written with the data pattern contained in the instruction and the part is ready for further instructions. A Ready/Busy status cannot be obtained if the CS is brought high after the end of the selftimed programming cycle, tWP. ERASE ALL (ERAL): The Erase All (ERAL) instruction programs every bit in the memory array to the logic "1" state and is primarily used for testing purposes. The DO pin outputs the Ready/Busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (tCS). The ERAL instruction is valid only at VCC = 5.0V 10%. WRITE ALL (WRAL): The Write All (WRAL) instruction programs all memory locations with the data patterns specified in the instruction. The DO pin outputs the Ready/Busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (tCS). The WRAL instruction is valid only at VCC = 5.0V 10%. ERASE/WRITE DISABLE (EWDS): To protect against accidental data disturb, the Erase/Write Disable (EWDS) instruction disables all programming modes and should be executed after all programming operations. The operation of the READ instruction is independent of both the EWEN and EWDS instructions and can be executed at any time. Timing Diagrams Figure 2. Synchronous Data Timing 1s (1) Note: This is the minimum SK period. Table 5. Organization Key for Timing Diagrams AT93C56A (2K) Notes: 6 AT93C66A (4K) I/O x8 x 16 x8 x 16 AN A8(1) A7(2) A8 A7 DN D7 D15 D7 D15 1. A8 is a don't care value, but the extra clock is required. 2. A7 is a don't care value, but the extra clock is required. AT93C56A/66A [Preliminary] 3403D-SEEPR-10/04 AT93C56A/66A [Preliminary] Figure 3. READ Timing tCS High Impedance Figure 4. EWEN Timing tCS CS SK DI 1 0 0 1 1 ... Figure 5. EWDS Timing tCS CS SK DI 1 0 0 0 0 ... 7 3403D-SEEPR-10/04 Figure 6. WRITE Timing tCS CS SK DI DO 1 0 AN 1 ... A0 DN ... D0 HIGH IMPEDANCE BUSY READY tWP Figure 7. WRAL Timing tCS CS SK DI DO 1 0 0 0 1 ... DN ... D0 BUSY HIGH IMPEDANCE READY tWP Note: 1. Valid only at VCC = 4.5V to 5.5V. Figure 8. ERASE Timing tCS CS STANDBY CHECK STATUS SK DI 1 1 1 AN AN-1 AN-2 ... A0 tDF tSV DO HIGH IMPEDANCE HIGH IMPEDANCE BUSY READY tWP 8 AT93C56A/66A [Preliminary] 3403D-SEEPR-10/04 AT93C56A/66A [Preliminary] Figure 9. ERAL Timing tCS CS CHECK STATUS STANDBY tSV tDF SK DI DO 1 0 0 1 0 BUSY HIGH IMPEDANCE HIGH IMPEDANCE READY tWP Note: Valid only at VCC = 4.5V to 5.5V. 9 3403D-SEEPR-10/04 AT93C56A Ordering Information Ordering Code Package Operation Range AT93C56A-10PA-5.0C AT93C56A-10SA-5.0C 8P3 8S1 Automotive (-40C to 125C) AT93C56A-10PA-2.7C AT93C56A-10SA-2.7C 8P3 8S1 Automotive (-40C to 125C) Package Type 8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options -5.0 Standard Operation (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.5V) 10 AT93C56A/66A [Preliminary] 3403D-SEEPR-10/04 AT93C56A/66A [Preliminary] AT93C66A Ordering Information Ordering Code Package Operation Range AT93C66A-10PA-5.0C AT93C66A-10SA-5.0C 8P3 8S1 Automotive (-40C to 125C) AT93C66A-10PA-2.7C AT93C66A-10SA-2.7C 8P3 8S1 Automotive (-40C to 125C) Package Type 8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options -5.0 Standard Operation (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.5V) 11 3403D-SEEPR-10/04 Packaging Information 8P3 - PDIP E 1 E1 N Top View c eA End View COMMON DIMENSIONS (Unit of Measure = inches) D e D1 A2 A b2 L b3 b 4 PLCS Side View SYMBOL NOM MAX NOTE 2 A - - 0.210 A2 0.115 0.130 0.195 b 0.014 0.018 0.022 5 b2 0.045 0.060 0.070 6 b3 0.030 0.039 0.045 6 c 0.008 0.010 0.014 D 0.355 0.365 0.400 3 D1 0.005 - - 3 E 0.300 0.310 0.325 4 E1 0.240 0.250 0.280 3 e 0.100 BSC eA 0.300 BSC L Notes: MIN 0.115 0.130 4 0.150 2 1. This drawing is for general information only; refer to JEDEC Drawing MS-001, Variation BA, for additional information. 2. Dimensions A and L are measured with the package seated in JEDEC seating plane Gauge GS-3. 3. D, D1 and E1 dimensions do not include mold Flash or protrusions. Mold Flash or protrusions shall not exceed 0.010 inch. 4. E and eA measured with the leads constrained to be perpendicular to datum. 5. Pointed or rounded lead tips are preferred to ease insertion. 6. b2 and b3 maximum dimensions do not include Dambar protrusions. Dambar protrusions shall not exceed 0.010 (0.25 mm). 01/09/02 R 12 2325 Orchard Parkway San Jose, CA 95131 TITLE 8P3, 8-lead, 0.300" Wide Body, Plastic Dual In-line Package (PDIP) DRAWING NO. REV. 8P3 B AT93C56A/66A [Preliminary] 3403D-SEEPR-10/04 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel: (33) 2-40-18-18-18 Fax: (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards 1150 East Cheyenne Mtn. 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