ACR3901U-S1 – Reference Manual
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Version 1.09
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Response Data Format (
abData
field in the
RDR_to_PC_DataBlock
)
SW1
SW2
Where:
SW1 SW2
= 90 00h if no error
7.2.8.5.
VERIFY_USER_CODE
This command is used to submit User Code (2 bytes) to the inserted card.User Code is used to
enable the memory access of the card.
The following actions are executed:
1. Present the specified code to the card.
2. Search a '1' bit in the presentation error counter and write the bit to '0'.
3. Erase the presentation error counter. The User Error Counter can be erased when the
submitted code is correct.
Command Format (
abData
field in the
PC_to_RDR_XfrBlock
)
Pseudo-APDU
CLA
INS
Error Counter LEN
Byte Address
MEM_L
CODE
Byte 1
Byte 2
FFh
20h
04h
08h
02h
Where:
Error Counter LEN
Length of presentation error counter in bits
Byte Address
Byte address of the key in the card
CODE
2 bytes User Code
Response Data Format (
abData
field in the
RDR_to_PC_DataBlock
)
SW1
SW2
Where:
SW1 SW2
= 90 00h if no error
= 63 00h if there are no more retries
Note: After SW1SW2 = 9000h has been received, read back the User Error Counter to check
if the VERIFY_USER_CODE is correct. If User Error Counter is erased and is equal to “FFh,”
the previous verification is successful.
