LRI2K datasheet(10/89 Pages) STMICROELECTRONICS

10 / 89 page

Description

LRI2K

10/89

Description

The LRI2K is a contactless memory powered by the received carrier electromagnetic wave.

It is a 2048-bit electrically erasable programmable memory (EEPROM). The memory is

organized as 64 blocks of 32 bits. The LRI2K is accessed via the 13.56 MHz carrier

electromagnetic wave on which 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 a data

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

Outgoing data are generated by the LRI2K load variation using Manchester coding with one

or two subcarrier frequencies at 423 kHz and 484 kHz. Data are transferred from the LRI2K

at 6.6 Kbit/s in low data rate mode and 26 Kbit/s fast data rate mode. The LRI2K supports

53 Kbit/s in high data rate mode with one subcarrier frequency at 423 kHz.

The LRI2K follows the ISO 15693 recommendation for radio-frequency power and signal

interface.

Figure 1.

Pad connections

Figure 2.

MLP connections

n/c means not connected internally.

Table 1.

Signal names

Signal name

Function

AC1

Antenna coil

AC0

Antenna coil

AI12065

AC1

LRI2K

AC0

Power

Supply

Regulator

Manchester

Load

Modulator

ASK

Demodulator

2048 bit

EEPROM

memory

AI11612

AC0

AC1

n/c

LRI2K 数据表(PDF) 10 Page - STMicroelectronics

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