LRIS2K datasheet(12/102 Pages) STMICROELECTRONICS

12 / 102 page

Description

LRIS2K

12/102

Description

The LRIS2K 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 LRIS2K 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 LRIS2K load variation using Manchester coding with

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

LRIS2K at 6.6 Kbit/s in low data rate mode and 26 Kbit/s high data rate mode. The LRIS2K

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

The LRIS2K 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

AI12853

AC1

LRIS2K

AC0

Power

Supply

Regulator

Manchester

Load

Modulator

ASK

Demodulator

2048 bit

EEPROM

memory

AI11612

AC0

AC1

n/c

LRIS2K Datenblatt(PDF) 12 Page - STMicroelectronics

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