Access IS LSR118 - Page 48

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MIFARE command bytes
Command header
Command code
Block number
Initial value
[0x5E]
Authenticate and decrement value block (Key B)
[0x8E] or [0xCE]
RF select, authenticate and decrement value
block (Key A)
[0x9E] or [0xDE]
RF select, authenticate and decrement value
block (Key B)
7.8.2 MIFARE response bytes
MIFARE response bytes
Response header
Response code
Block number
Status bytes
[0x00]
Any one of the following
values
(Command code + 1)
[0x0F] or [0x1F]
[0x4F] or [0x5F]
[0x8F] or [0xCF]
[0x9F] or [0xDF]
Block number
[0x90][0x00] Success
[0x69][Status Code]
Failure
Refer to page 55 for information on MIFARE failure status codes.
7.8.3 Example
This command successfully decrements the previously created value field at block number 4 by
[0x00000001]. The command uses the loaded key and authenticates against Key A in the media.
USB
Command:
[0x00][0x4E][0x04][0x00][0x00][0x00][0x01]
Response:
[0x00][0x4F][0x04][0x90][0x00]
Serial
Command:
[0x6F][0x07][0x00][0x00][0x00][0x00][0x00][0x00][0x00][0x00]
[0x00][0x4E][0x04][0x00][0x00][0x0][0x01]
Response:
[0x80][0x05][0x00][0x00][0x00][0x00][0x00][0x00][0x00][0x00]
[0x00][0x4F][0x04][0x90][0x00]