RWD_QT Datasheet, PDF (15/19 Pages) rfsolutions.ltd – The MicroRWD “QT” (Quad-Tag) version is a complete 125kHz reader solution for Hitag 1,

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Card UID
Command to return card status and UID (Unique Identifier or Serial number).
The acknowledge byte flags indicate general Tag status.
Command:
B7
B0
01010101
(ASCII “U”, 0x55)
Acknowledge: 1 1 F F F F F X
(F = Status flags)
Data only follows if card was selected OK with no errors detected.
Reply1:
Reply2:
Reply3:
Reply4:
DDDDDDDD
DDDDDDDD
DDDDDDDD
DDDDDDDD
(D =MS Byte of UID/Serial number from card)
(D =LS Byte of UID/Serial number from card)
Note that the CARD UID command works independently of the PASSWORD mode.
The PASSWORD authentication only occurs for READ/WRITE operations.
Hitag 2 Memory Map (PASSWORD mode)
The memory of the Hitag 2 transponder consists of 256 bits of very low power EEPROM
memory which is organised into 8 pages of 32 bits (4 bytes) each.
Page No.
0
1
2
3
4
5
6
7
Content (32 bit words/ 4 bytes)
Serial number
Password RWD
(Default = “MIKR” = 4D 49 4B 52 hex)
Reserved
8 bit Configuration, 24 bit Password TAG (Default = 06 AA 48 54 hex)
Read/Write page
Read/Write page
Read/Write page
Read/Write page
15