ACS ACK30 Smart Keyboard - Manual (Page 32)

ACR30 Reference Manual
Version 3.3 January 2009 Page 32 of 44
ACR30
Command format
Instruction
Code
Data length Data
LEN ADDR BYTE 1 ... ... BYTE
N
94
H
LEN Number of data bytes to be write protected, N, + 2
ADDR Byte address in the card of the first byte to be write protected. The high byte of the
address is specified as the first byte of ADDR.
BYTE x Byte values to be compared with the data in the card starting at address ADDR. BYTE 1
is compared with the data at address ADDR; BYTE N is compared with the data at
address ADDR+N-1.
Response data format
No response data
9.2.3.6. PRESENT_CODE (only SLE 4442) (*)
To submit the secret code to the card to enable the write operation with the SLE 4442 card.
The following actions are executed by the ACR30:
- search a '1' bit in the presentation error counter and write the bit to '0'
- present the specified code to the card
- try to erase the presentation error counter
Command format
Instruction Code Data length Data
CODE
92
H
03
H
CODE Three bytes secret code (PIN)
Response data format
ERRCNT CODE
ERRCNT The value of the presentation error counter after the code presentation.
CODE The three bytes secret code read from the card.
If the correct code has been presented to the card, the value of ERRCNT is 07
H
and the
value of CODE is identical to the code data specified in the command.