Summary description

LRIS2K

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Summary 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 13.56MHz 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 1.6Kbit/s using the 1/256 pulse coding mode or a Data

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

Outgoing data are generated by the LRIS2K load variation using Manchester coding with

one or two sub-carrier frequencies at 423KHz and 484KHz. Data are transferred from the

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

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

The LRIS2K follows the ISO15693 recommendation for Radio frequency power and signal

interface.

Figure 1.

Pad Connections

Table 1.

Signal Names

AC1

Antenna Coil

AC0

Antenna Coil

AI12853

AC1

LRIS2K

AC0

Power

Supply

Regulator

Manchester

Load

Modulator

ASK

Demodulator

2048 bit

EEPROM

memory