LRIS64K datasheet(10/100 Pages) STMICROELECTRONICS

10 / 100 page

Description

LRIS64K

10/100

Doc ID 15336 Rev 11

Description

The LRIS64K is a contactless memory powered by the received carrier electromagnetic

wave, which follows the ISO/IEC 15693 and ISO/IEC 18000-3 mode 1 recommendation for

radio-frequency power and signal interface. It is a 64 Kbit electrically erasable

programmable memory (EEPROM). The memory is organized as 64 sectors divided into 32

blocks of 32 bits.

The LRIS64K 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 LRIS64K load variation using

Manchester coding with one or two subcarrier frequencies at 423 kHz and 484 kHz. Data

are transferred from the LRIS64K at 6.6 Kbit/s in low data rate mode and 26 Kbit/s in high

data rate mode. The LRIS64K supports the 53 Kbit/s data rate in high data rate mode with a

single subcarrier frequency of 423 kHz.

The LRIS64K also features a unique 32-bit multi-password protection scheme.

Figure 1.

Pad connection

Table 1.

Signal names

Signal name

Function

Direction

AC0

Antenna coil

I/O

AC1

Antenna coil

I/O

AI15689

AC1

AC0

Power

Supply

Regulator

Manchester

Load

Modulator

ASK

Demodulator

64 Kbit

EEPROM

memory

LRIS64K Datasheet(PDF) 10 Page - STMicroelectronics

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