CRX14 Datasheet | STMicroelectronics

FEATURES SUMMARY s Single 5V ±500m V Supply Voltage s s Figure 1. Packages SO16N package External Oscillator - 13.56MHz Quartz - 32.768k Hz Quartz with Frequency Multiplier s Contactless munication - 13.56MHz Carrier Frequency - ISO 14443B - 2 Air Interface pliant - ISO 14443B - 3 Frame Format pliant - Support Frame Answer with/without SOF/ EOF - CRC generation and check - France Tele Function Proprietary Anti-Clone 16 1 SO16 (MQ) 150 mil width - Automated ST anti-collision exchange s I²C munication - Two Wire I²C Serial Interface - Supports 400 k Hz Protocol - 3 Chip Enable pin - Up to 8 CRX14 connected on the same bus June 2002 plete data available under NDA. 1/4 SUMMARY DESCRIPTION The CRX14 is a contactless coupler, pliant 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 847k Hz 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 remendation for the radio-frequency power and signal interface. Figure 2. Logic Diagram authentication capability and to build a system with a high level of security at low cost. Table 1. Signal Names RF OUT RF IN VCC / GND GND_RF OSC1 / OSC2 PLL_RC Vref OSC_SEL RESET SCL SDA Antenna Output Driver Antenna Input Filter Power Supply & Ground Ground for RF circuitry Oscillator input PLL RC filter Input Transmitter Reference Voltage 13.56MHz/32.768k Hz osc select Reset I²C Clock I²C Bi-Directional Data I²C Chip Enable I²C Chip Enable I²C Chip Enable Vref E0 E1 OSC_SEL OSC1 OSC2 PLL_RC RESET SCL SDA E0 E1 E2 Transmitter RF OUT E2 Figure 3. SO...