User's Manual

ACR1281U

 Advanced Card Systems Ltd. Page 64 of 81

Pseudo-APDU

CODE CLA INS Error Counter

LEN

Byte

Address

MEM_L

Byte 1

Byte 2

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

SW1 SW2

• SW1, SW2 = 90 00 if no error.

= 63 00 if there is no more retry chance

Note: After SW1SW2 = 90 00 has been received, read back the User Error Counter can check

whether the VERIFY_USER_CODE is correct. If User Error Counter is erased and equals to “FF”,

the previous verification is success.

8.6 Verify Memory Code

To submit Memory Code (4 bytes) to the inserted card. Memory Code is used to authorize the

reloading of the user memory, together with the User Code.

The following actions are executed:

- present the specified code to the card

- search a '1' bit in the presentation error counter and write the bit to '0'

- erase the presentation error counter. Please note that Memory Error Counter

cannot be erased.

• Command format