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SUMMARY DESCRIPTION

The CRX14 is a contactless coupler that is compliant with the short range ISO14443 type-B standard. It is controlled using the two wire I2C bus.

The CRX14 generates a 13.56MHz signal on an external antenna. Transmitted data are modulated using Amplitude Shift Keying (ASK). Received data are demodulated from the PICC (Proximity in tegrated Coupling Card) load variation signal, in duced on the antenna, using Bit Phase Shift Keying (BPSK) of a 847kHz sub-carrier. The Transmitted ASK wave is 10 modulated. The Data transfer rate between the CRX14 and the PICC is 106 Kbit/s in both transmission and reception modes.

The CRX14 follows the ISO14443 type-B recommendation for Radio frequency power and signal interface.

FEATURES SUMMARY

■ Single 5V ±500mV Supply Voltage

■ SO16N package

■ Contactless Communication

– ISO14443 type-B protocol

– 13.56MHz Carrier Frequency using an External Oscillator

– 106 Kbit/s Data Rate

– 36 Byte Input/Output Frame Register

– Supports Frame Answer with/without SOF/EOF

– CRC Generation and Check

– France Telecom Proprietary Anti-Clone Function

– Automated ST Anti-Collision Exchange

■ I2C Communication

– Two Wire I2C Serial Interface

– Supports 400kHz Protocol

– 3 Chip Enable Pins

– Up to 8 CRX14 Connected on the Same Bus