IC Card EEPROMs MN63154 EEPROM for IC Cards Overview The MN63154 is an EEPROM for use in IC cards. It features security features and an address specification system using opcode input. Low cost combined with high security makes the chips ideal for use in prepaid cards and other types of IC cards. Features Easy-to-use control system • Address specification system using opcode input over a 3-wire interface (CLK, I/O, and RST) • Automatic erasing and writing using a single 5 volt power supply Pad Assignment GND I/O 1 2 5 VDD 4 RST 3 CLK (TOP VIEW) Note: This product is sold as wafers. Flexible memory-layout The memory is divided into 11 areas. Six areas containing 500 bytes are freely usable. Advanced security features • Verification of IC card authenticity The IC passes entered data through a random number generator circuit on its way to output to provide a check of card validity. • Protection against malicious experimentation Four or more unsuccessful attempts to access the IC card render it permanently unusable. • Protection of individual memory areas on the card Read or write access to a memory area requires matches for both security and condition codes. There is also a condition code for permanently disabling re-write. • Mixed configuration of EPROM and EEPROM Individual areas consist of EPROM or EEPROM. High reliability • Write cycles: 10,000 times • Data storage interval: 10 years Applications IC cards 1 MN63154 IC Card EEPROMs Block Diagram GND 5 1 Memory 256 × 16 VDD Address decoder Data register I/O buffer 2 I/O Random number generator 3 CLK 2 4 Mode decode-logic RST IC Card EEPROMs MN63154 Pin Descriptions Pin No. 1 Symbol GND Pin Name Ground I/O I Data I/O I/O 2 I/O 3 CLK 4 RST Reset I 5 VDD Power supply I Clock I Electrical Characteristics VCC=4.5 to 5.5V, Ta=–10˚C to +70˚C Parameter Power supply voltage Symbol VCC Test Conditions min 4.5 max 5.5 Unit V "L" level input leakage current ILIL –10 10 µA "H" level input leakage current ILIH –10 10 µA VCC power supply current ICC — 5.45 mA — 0.18 mA VCC=5.5V (during operation) CLK=800kHz VCC power supply current ISB CLK="L" (during standby) I/O="H" Notes 1: I/O pins use N-channel, open drain configuration. 2: Input voltages, output voltages, and other items not listed above conform to ISO/IEC 7816-3. Function Descriptions Orders READ Start bit 0 Operation code 10 Address A8, A7 to A0 Data D0, D1 to D31 Contents Read WRITE 0 01 A8, A7 to A0 D0, D1 to D15 Write VERIFY 0 11 000001010 D0, D1 to D31 Verify code RNGEN 0 00 000001010 D0, D1 to D31 Verify code, generate DO0, DO1 to DO31 random number RESET 0 11 111111111 — Reset EWEN 0 00 1xxxxxxxx — Enable write Note: x means "don’t care". 3 MN63154 IC Card EEPROMs Memory Layout Area A Contents Chip manufacturer's code Number of Bits 16 Memory Type EPROM B Card manufacturer's code 16 EPROM C Spare area 1 32 EPROM D Spare area 2 16 EEPROM E Spare area 3 48 EPROM F Spare area 4 16 EEPROM G Security code 32 EEPROM H Error counter 16 EEPROM I1 Condition code 1 8 EPROM I2 Condition code 2 8 EEPROM J Application area 1 1952 EEPROM K Application area 2 1936 EEPROM Timing Chart CLK I/O Start bit and opcode Note: This product is sold as wafers. 4 Address Data