AN3209 datasheet(11/42 Pages) STMICROELECTRONICS

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AN3209

Component overview

Doc ID 17419 Rev 2

11/42

2.1.3

M24LR64-R RF Interface

In ISO 15693/ISO 18000-3 1 RF mode, the M24LR64-R is accessible via the 13.56 MHz

carrier electromagnetic wave. Incoming data are demodulated from the received signal

amplitude modulation (ASK: amplitude shift keying). The received ASK wave is 10% or

100% modulated with a data rate of 1.6 Kbit/s using the 1/256 pulse coding mode, or

26 Kbit/s using the 1/4 pulse coding mode.

Outgoing data are generated by the M24LR64-R load variation using Manchester coding

with one or two subcarrier frequencies at 423 kHz and 484 kHz. Data are transferred from

the M24LR64-R at 6.6 Kbit/s in low data rate mode and 26 Kbit/s high data rate mode. The

M24LR64-R supports the 53 Kbit/s in high data rate mode in one subcarrier frequency at

423 kHz. The M24LR64-R follows the ISO 15693/ISO 18000-3 mode 1 recommendation for

radio-frequency power and signal interface

RF commands are sent and decoded by the RFID reader. The demonstration application

can operate with FEIG and estar USB readers, for compliance with the available M24LR64-

R kits:

●

Development kit: FEIG reader

●

Demonstration kit: FEIG reader

●

Starter kit: estar reader

The commands depend on the type of reader.

The PC M24LR64-R_Datalogger_application_software is developed in Visual Basic. It

includes functions allowing to operate the datalogger with both FEIG and estar readers:

●

Inventory

●

Reset To Ready

●

Read Single Block

●

Write Single Block

●

Read Multiple Block

Refer to Appendix B: M24LR64-R RF commands for a detailed description of these

functions.

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