at88sa10hs ATMEL Corporation, at88sa10hs Datasheet - Page 12

• Manufacturer Part Number: at88sa10hs
• Description: Cryptoauthentication Host Security Chip
• Manufacturer: ATMEL Corporation

4.
12
Commands
The command packet is broken down in the following way:
If a command fails because the CRC within the block is incorrect or there is some other communications error, then
immediately after t
The value of that byte will be all 1’s. In this situation, the system should re-transmit the command block including the
proceeding Transmit flag – providing there is sufficient time before the expiration of the watchdog timeout.
If the opcode is invalid, one of the parameters is illegal, or the AT88SA10HS is in an illegal state for the execution of
this command, then immediately after t
single byte packet. The value of that byte will be 0x0F. In this situation, the condition must be corrected before the
(modified) command is sent back to the AT88SA10HS.
If a command is received successfully, the system will be able to retrieve the output block as described in the individual
command descriptions below after the appropriate execution delay.
In the individual command description tables following, the “Size” column describes the number of bytes in the
parameter documented in each particular row. The total size of the block for each of the commands is fixed, though
that value is different for each command. If the block size for a particular command is incorrect, the chip will not attempt
the command execution and returns an error.
AT88SA10HS Host Authentication Chip [Preliminary]
Byte
0
1
2-3
4 +
Name
Opcode
Param1
Param2
Data
PARSE
the system will be able to retrieve an error response block containing a single byte packet.
Meaning
The Command code
The first parameter – always present
The second parameter – always present
Optional remaining input data
PARSE
the system will be able to retrieve an error response block containing a
8595B–SMEM–09/09