User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 119
12.4.6.5 my-d™ command
This command sends and receives my-d™ plain and secure commands including
my-d™ secure algorithm.
Command
Command Data
‘z’ Downlink length (1 byte)
Option byte (1 byte)
[UID (8 bytes)]
my-d™ data (n bytes)
Answer
Answer Description
Data Status byte: 00h (1 byte)
Data without MAC and CRC (n bytes)
Downlink length
This byte is mandatory. It will define the length of the my-d™ data frame sent to the
reader. The MAC, CRC and the framing overhead is not included.
Option byte
The option byte defines general behavior of the command.
Note that ISO 14443 tags are only working in selected mode.
Bit Description
7 If set the MAC is calculated and added to the frame
6 If set the tag is in addressed mode. The UID is following as
first 8 bytes after the option byte. The my-d™ frame is
following.
5 If set the tag is selected. No UID is needed.
4 - 0 RFU