User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 34
10 ICODE UID
The memory has a capacity of 192 bits and is organized in 24 blocks, consisting of 1
byte each. All MSB of the different fields (UD, UD CRC, CRC16, Destroy Code) are
located at the lowest block address.
10.1 Memory organization
Page address
Access Condition Description
21h – 23h OTP Destroy Code
19h - 20h OTP CRC16
14h – 18h RO UID
12h – 13h R/W UD CRC16
00h – 11h R/W User data (UD)
Figure 10-1: ICODE UID memory organization
10.2 Read Block
It is possible to read the user data (12 bytes) with the read block 'rb' command using
block address 00h.
10.3 Write Block
It is possible to write the UD data (12 bytes) with the write block 'wb' command using
block address 00h.
Additionally it is possible to write the destroy code (3 bytes) with the write block 'wb'
command using block address 01h.