User's Manual

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READER=>HOST: 0x00 – ACK byte
0x78 – related command code MFDF_DELETE_FILE
3.5.26 Get free memory (0x79)
This command returns a value corresponding to the amount of free memory available on the TAG. No
arguments are required. The available memory is returned as a 4 byte unsigned LSB value.
Command description
Argument
Size
Value
Description
Command ID
1
0x79
MFDF_GET_FREE_MEM
Response description
ACK
1
0x00
Command ID
1
0x79
MFDF_GET_FREE_MEM
Free memory
4
X
Free memory, 4
-
bytes, LSB first
Example:
HOST=>READER: 0x79 – MFDF_GET_FREE_MEM
READER=>HOST: 0x00 – ACK byte
0x79 – related command code MFDF_GET_FREE_MEM
0x00 0x08 0x00 0x00 – free memory
3.5.27 Format memory (0x7A)
This command releases user memory in the TAG. No arguments are required.
Command description
Argument
Size
Value
Description
Command ID
1
0x7A
MFDF_FORMAT
Response description
ACK
1
0x00
Command ID
1
0x7A
MFDF_FORMAT
Example:
HOST=>READER: 0x7A – MFDF_FORMAT
READER=>HOST: 0x00 – ACK byte
0x7A – related command code MFDF_FORMAT
3.5.28 Commit transaction (0x7B)
This command validates all previous write access on backup data files, value files and record files within
one application. No arguments are required.