HID Global Corporation 5553 用户手册
HF Multi ISO RFID Reader User Manual, Firmware V1.4
1508-USM-00-0-04
2.3.4.5
my-d™ command
This command sends and receives my-d™ plain and secure commands including my-d™ secure
algorithm.
algorithm.
Command
Command
Data
‘z’
Downlink length (1 byte)
Option byte (1 byte)
[UID (8 bytes)]
my-d™ data (n bytes)
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)
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.
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.
the option byte. The my-d™ frame is following.
5
If set the tag is selected. No UID is needed.
4 – 0
RFU
Data
Data is sent as my-d™ plain command. It contains only data that is processed by the MAC
calculation. If the tag is addressed, only valid with ISO 15693 tags, with its UID the first 8 bytes
are interpreted as UID and not included into the MAC calculation.
calculation. If the tag is addressed, only valid with ISO 15693 tags, with its UID the first 8 bytes
are interpreted as UID and not included into the MAC calculation.
MAC calculation is done automatically if according flag is set. The ISO 15693 or the ISO 14443
frame is completed and the CRC is computed and added automatically.
frame is completed and the CRC is computed and added automatically.
The commands Write Page, Restricted Write and Write Byte do not need any MAC verification for
the answer.
the answer.
August 2010
Page 89 of 144
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