CRX14

Features:

` Single 5V ±500mV Supply Voltage
` SO16N package
` External Oscillator
13.56MHz Quartz
32.768kHz Quartz with Frequency Multiplier
` Contactless Communication
13.56MHz Carrier Frequency
ISO 14443B - 2 Air Interface Compliant
ISO 14443B - 3 Frame Format Compliant
Support 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 400 kHz Protocol
3 Chip Enable pin
Up to 8 CRX14 connected on the same bus


Pinout




Description

The CRX14 is a contactless coupler, compliant with the short range ISO14443B standard 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) modulation. Received data are demodulated from the tag load variation signal, generated on the antenna, using Bit Phase Shift Keying (BPSK) coding of an 847kHz sub-carrier. The Transmitted ASK wave is 10% modulated. The Data transfer rate between the CRX14 and the tag is 106Kbit/s in both transmission and reception modes.

The CRX14 follows the ISO 14443 part 2 type B recommendation for the radio-frequency power and signal interface.

The CRX14 targets short range applications which need disposable or secure and re-usable products. The CRX14 includes an automated anti-collision mechanism that allows it to detect and select tags present at the same time within range of the CRX14. The anti-collision is based on the STMicroelectronics probabilistic scanning methodology.

The CRX14 provides an anti-clone function from FRANCE TELECOM which allows tag authentication. With the use of the single chip coupler CRX14, it is easy to design a reader with theauthentication capability and to build a system with a high level of security at low cost.

The CRX14 provides a complete analog interface, compliant with the ISO/IEC 14443 recommendations for a radio-frequency power and signal interface. It allows the ISO 14443-2 type B proximity tag to be powered and to have control data transmitted, via a simple antenna. The CRX14 is fabricated with STMicroelectronics High Endurance Single Polysilicon CMOS technology.