User guide

ACR38x – Reference Manual [e-mail]
Version 6.02
www.acs.com.hk
Page 35 of 40
9.2.2.6.5. READ_PRESENTATION_ERROR_COUNTER_MEMORY_CARD (SLE 4442
and SLE 5542)
This command is used to read the presentation error counter for the secret code.
Send Buffer Format
SCardTransmit Send Buffer
CLA INS P1 P2 MEM_L (P3)
FFh B1h 00h 00h 00h
Response Buffer Format
SCardTransmit Receive Buffer
ERRCNT DUMMY 1 DUMMY 2 DUMMY 3 SW1 SW2
Where:
ERRCNT The value of the presentation error counter.
DUMMY Three bytes dummy data read from the card.
SW1 SW2 = 90 00h if no error.
9.2.2.6.6. CHANGE_CODE_MEMORY_CARD (SLE 4442 and SLE 5542)
This command is used to write the specified data as new secret code in the card.
The current secret code must be presented to the card with the PRESENT_CODE command prior to
the execution of this command.
Send Buffer Format
SCardTransmit Send Buffer
CLA INS P1 P2 MEM_L (P3)
CODE
Byte 1 Byte 2 Byte 3
FFh D2h 00h 01h 03h
Response Buffer Format
SCardTransmit Receive Buffer
SW1 SW2
Where:
SW1 SW2 = 90 00h if no error.