User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 107
12.4.5.3 Get key status
This command reports the key status of the reader. The reader lists for each key the
key information. This command is used to inform the key management about the key
status. The first byte of the response lists the number of stored keys.
Command
Command Data
‘it’ key type (1)
Answer
Answer Description
my-d™ secure
Data
Number of keys (1 byte)
[Key information (8 bytes)]
• Free User part (1 byte)
• Project ID (3 bytes)
• Logical Sector ID (1 byte)
• Key type (1 byte)
• KVV (2 bytes)
DES Data Number of keys (1 byte)
[Key information (10 bytes)]
• Option byte (1 byte)
• Free User part (9 bytes)
mifare
®
Data Number of keys (1 byte)
[Key information 10 bytes)]
• Free User part (10 bytes)
More than 255 bytes
If the amount of data exceeds 255 bytes, than the answer is divided into more
frames.
If a frame follows, the Number of keys byte is extended with a set MSB (80h).