Present_Code_Memory_Card - ACS ACR 38 Reference Manual

Command format
Header
01
H
Byte Address = Memory address location of the memory card.
LEN = 5 + MEM_L
MODE Specifies the write mode and backup option
00 : write
H
01 : write with carry
H
02 : write with backup enabled (SLE4436 and SLE5536 only)
H
03 : write with carry and with backup enabled (SLE4436 and SLE5536 only)
H
BYTE Byte value to be written to the card
Response data format
SW1, SW2 = 90 00
H

PRESENT_CODE_MEMORY_CARD

To submit the secret code to the memory card to enable the card personalization mode. The following actions are executed:
- search a '1' bit in the presentation counter and write the bit to '0'
- present the specified code to the card
The ACR38 does not try to erase the presentation counter after the code submission! This must be done by
the application software through a separate 'Write with carry' command.
Command format
Header Instruction
01 A0
H H
ADDR Byte address of the presentation counter in the card
CODE Three bytes secret code (PIN)
ACR38 Reference Manual
Version 2.2 January 2008
A C R 3 8 S m a r t C a r d R e a d e r / W r i t e r
Instruction Data length
LEN CLA
MSB LSB
A0 FF
H
Header Status
01
H
if no error
H
Data length
CLA
LEN
MSB LSB
00 08 FF
H H H
Data
INS P1 Byte MEM_L
Address
D0 00
H H H
Data length SW1 SW2
LEN
Data
INS P1 P2 MEM_L
20 00 00 04
H H H H
MODE BYTE
02
H
CODE
ADDR Byte 1 Byte 2 Byte 3
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