MagTek IntelliStripe 320 99875168 - Manual (Page 112)

IntelliStripe 320 Command Reference
106
Response APDU:
SW1 SW2
Possible SW1/SW2 combinations:
SW1/SW2 Meaning
9000
Normal completion, no errors
6581 Memory Failure, some bits were not erased
Verify/Erase Application Zone APDU
This command is used to do two types of security operations on the card. First, it is used to
present the User Code which unlocks further functionality. Second, it is used to erase/reload
application zones by presenting the Memory Code.
Command APDU:
CLA INS P1 P2 Lc Data Field
D0/D1 20/22 Tries Adr Len Data to be verified
CLA is always D0 or D1 (the lowest bit specifies the state of C4)
INS is either 20(Verify) or 22(Erase Application Zone)
P1 specifies Tries, the maximum number bits which will be searched for a ‘1’ value to
write to ‘0’ in preparation for the erase sub-operation that completes the Verify/Erase
command. For application zones that do not require writing of a bit to cause erasure, use
a 00 in Tries. This will cause the erase operation to be performed on the next bit after
presentation of the Memory Code.
P2 is the byte address of the code to be verified (usually called User Code or Memory
Code). NOTE: WHEN USING Lc=0, THIS ADDRESS MUST BE THE ADDRESS OF
THE COUNTER TO BE EVALUATED (I.E. IN A 4404 THE USER CODE IS AT
ADDRESS 08H AND THE CORRESPONDING ERROR COUNTER IS AT ADDRESS
0AH. TO EVALUATE THIS COUNTER THE COMMAND APDU WOULD BE:
D0 20 04 0A 00).
Lc is the number of bytes for verification:
If the value is 00, the status 63Cx will be returned where x indicates the number
of further retries allowed, if x is F, there may be even more than 15 retries
remaining. This mode does not use up any retries!
Response APDU:
SW1 SW2