7. Synchronous Protocol ................................................................................... 29
7.1 Start-up Sequence............................................................................................ 29
7.2 Command Set................................................................................................... 30
7.3 Command Format............................................................................................. 31
7.4 Acknowledge Polling......................................................................................... 32
7.5 Device Addressing............................................................................................ 33
7.6 Command Descriptions..................................................................................... 33
7.6.1 Write User Zone: $B0............................................................................. 33
7.6.2 Read User Zone: $B2 ............................................................................ 34
7.6.3 System WRITE: $B4 .............................................................................. 35
7.6.4 System Read: $B6 ................................................................................. 37
7.6.5 Verify Crypto: $B8.................................................................................. 39
Verify Password: $BA ....................................................................................... 41
8. Initialization Example..................................................................................... 42
8.1 Write Data to User Zones ................................................................................. 42
8.2 Unlock the Configuration Memory..................................................................... 42
8.3 Write Data to the Configuration Memory........................................................... 42
8.4 Set Security Fuses............................................................................................ 42
9. Asynchronous T=0 Protocol .......................................................................... 45
9.1 Character Format.............................................................................................. 45
9.2 Command format .............................................................................................. 45
9.3 PPS Support..................................................................................................... 46
9.4 Command Set................................................................................................... 48
9.4.1 Status Words.......................................................................................... 49
9.4.2 Example: Write EEPROM Command..................................................... 50
9.4.3 Write User Zone: $B0............................................................................. 51
9.4.4 Read User Zone: $B2 ............................................................................ 52
9.4.5 System Write: $B4 ................................................................................. 53
9.4.6 Send Checksum..................................................................................... 54
9.4.7 System READ: $B6................................................................................ 55
9.4.8 Verify Crypto: $B8.................................................................................. 57
9.4.9 Verify Password: $BA ............................................................................ 59
10. Initialization Example..................................................................................... 60
10.1 Write Data to User Zones ................................................................................. 60
10.2 Unlock the Configuration Memory..................................................................... 60
10.3 Write Data to the Configuration Memory........................................................... 60
10.4 Set Security Fuses............................................................................................ 60
11. Absolute Maximum Ratings* ......................................................................... 63
11.1 DC and AC Characteristics............................................................................... 63
11.2 Timing Diagrams for Synchronous Communications ........................................ 65
12. DC Tamper Detection Limits ......................................................................... 67
12.1 High Voltage and Low Voltage Limit ................................................................. 67
12.2 Minimum Clock Pulse ....................................................................................... 67
12.3 Maximum Clock Frequency .............................................................................. 67
12.4 Power On Reset (POR) Delay .......................................................................... 67
12.5 Noise Suppression............................................................................................ 67
13. Ordering Information...................................................................................... 68
3
AT88SC0104C/0204C/0404C/0808C/1616C/3216C/6416C/12816C/25616C [Datasheet]
Atmel-5211F-CryptoMem-Full-Specification-Datasheet_032015
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