AT88SC0104/0204/0404/0808/CA
1
8664C–CRYPT–1/10
Table of Contents
1. Pin Configuration and Package Information .........................................................................................3
1.1. Pin Configuration ...........................................................................................................................3
1.2. Package Information .....................................................................................................................3
2. Description .............................................................................................................................................4
2.1. Differences from Atmel AT88SCxxxxC Family of Products ..........................................................4
2.2. Embedded Applications .................................................................................................................4
2.3. Smart Card Applications ................................................................................................................4
2.4. Scope ............................................................................................................................................4
3. Block Diagram ..........................................................................................................................................5
4. Pin Description .........................................................................................................................................6
4.1. Supply Voltage (V
CC
) .....................................................................................................................6
4.2. Clock (SCL/CLK) ...........................................................................................................................6
4.3. Serial Data (SDA/IO) .....................................................................................................................6
4.4. Reset (RST)...................................................................................................................................6
5. Configuration and User Zone Description .............................................................................................7
5.1. Detailed Description ......................................................................................................................7
5.2. Control Logic .................................................................................................................................7
5.3. Configuration Memory ...................................................................................................................7
5.4. User Memory .............................................................................................................................. 10
6. Communication Security Modes.......................................................................................................... 14
6.1. Security Operations .................................................................................................................... 14
6.2. Data Protection Features ........................................................................................................... 17
6.3. Configuration Memory Values .................................................................................................... 18
6.4. Security Fuses ............................................................................................................................ 22
7. Protocol Selection ................................................................................................................................. 24
7.1. Synchronous Mode for Embedded Applications ........................................................................ 24
7.2. Asynchronous Mode for Smart Card Applications ..................................................................... 25
8. Synchronous Protocol .......................................................................................................................... 26
8.1. Start-up Sequence ..................................................................................................................... 26
8.2. Command Set ............................................................................................................................ 27
8.3. Command Format ...................................................................................................................... 28
8.4. Acknowledge Polling .................................................................................................................. 30
8.5. Device Addressing ..................................................................................................................... 31
8.6. TWI Command Descriptions ...................................................................................................... 31
8.7. Write User Zone: $B0 ................................................................................................................. 31
8.8. Random Read: $B1 .................................................................................................................... 32
8.9. System WRITE: $B4 .................................................................................................................. 34
8.10. System READ: $B6 .................................................................................................................... 36
8.11. Verify CRYPTO: $B8 .................................................................................................................. 37
8.12. Verify Password: $BA ................................................................................................................. 39
