User's Manual Part 1

13,56 MHz Multitag Reader Module, Version 0.9v
ACG Identification Technologies AT Page 7
3.3 ISO 15693
The reader can communicate with ISO15693 tags. An anticollision is needed if
multiple instances of tags are in the same antenna field. The reader detects each
type of ISO15693 labels and handles them individually
3.3.1 Coding of UID
The UID of a tag is defined in ISO/IEC 15693-3. All tags compliant to ISO15693
support the specified format. The UID is factory programmed and cannot be
changed. The UID is needed for the anticollision sequence to separate several tags
in the same antenna field.
Byte
7 6 5 4 3 2 1 0
E0h MFR
Code
Serial number
Figure 3-3: Coding of ISO 15693 UID
The MFR Code is listed in ISO/IEC 7816-6:1996/Amd.1: 2000(E). Following
manufacturer are tested with our reader
MFR-Code Company
02h ST Microelectronics
04h Philips Semiconductors
05h Infineon Technologies AG
07h Texas Instrument
16h EM Microelectronic-Marin SA
Figure 3-4: Manufacturer codes
3.3.2 Memory organization
An ISO15693 tag is separated into two blocks. An administrative block which
contains the UID, AFI, DSFID and the lock page state. The user block is free for
custom use. The chip manufacturer defines the amount of bytes and number of
pages of each tag. As default four bytes are used for several tags.
Byte
Page
address
0 1 2 3
3Fh User data
… …
00h User data
Administrative block
Figure 3-5: Memory organization of ISO 15693