User's Manual

Table Of Contents

RFI341 Radio Frequency Interrogator

ISO/IEC 15693-3 Anticollision and Transmission Protocol

This part of ISO/IEC 15693 describes the anticollision and transmission

protocols.

The anticollision is based on a UID that each tag supports. The length of this

ID is 64 bits and it is guaranteed by the manufacture of the IC that the ID is

unique

AFI

The Application Field Identifier (AFI) should – if available – represent the

application for which the transponder is used. It can be programmed and

locked within the transponder with the commands given in the document

“Telegram Listing RFI341”.The AFI consists of 8 bits. If no applicable

preselection is possible, use “0h”..

The support of the AFI feature is optional. That means it is possible that ISO

15693 compliant transponders do not offer this AFI feature. It is recommend

that only those transponders that offer this AFI byte be used.

Therefore, check carefully the selection of the transponder IC type and the

requirements given by the application.

DSFID

The Data Storage Format Identifier (DSFID, 8 bit) can be used to indicate in

which manner the user data is structured in the user memory. If no DSFID is

used, this value should be “0h”.

Anticollision

The purpose of the anticollision is to make an inventory of the transponders

present in the field by using their UIDs.

The anticollision is based on slots. The interrogator can use one or sixteen

slots. If the interrogator wants to ensure that tags are present for an

anticollision or knows that only one transponder is present in the field, the

slot length of one is adequate.

If additional transponders are in the field, the interrogator will detect this by a