Introduction
This data sheet describes the functionality of the CLRC632 Integrated Circuit (IC). It includes the functional and electrical specifications and from a system and hardware viewpoint gives detailed information on how to design-in the device.

Features and benefits
General
■ Highly integrated analog circuitry for demodulating and decoding card/label response
■ Buffered output drivers enable antenna connection using the minimum of external
   components
■ Proximity operating distance up to 100 mm
■ Supports both ISO/IEC 14443 A and ISO/IEC 14443 B standards
■ Supports MIFARE dual-interface card ICs and the MIFARE Mini, MIFARE 1K,
   MIFARE 4K protocols
■ Contactless communication at MIFARE higher baud rates (up to 424 kBd)
■ Supports both I-CODE1 and ISO/IEC 15693 protocols
■ Crypto1 and secure non-volatile internal key memory
■ Pin-compatible with the MFRC500, MFRC530, MFRC531 and the SLRC400
■ Parallel microprocessor interface with internal address latch and IRQ line
■ SPI compatibility
■ Flexible interrupt handling
■ Automatic detection of parallel microprocessor interface type
■ 64-byte send and receive FIFO buffer
■ Hard reset with low power function
■ Software controlled Power-down mode
■ Programmable timer
■ Unique serial number
■ User programmable start-up configuration
■ Bit-oriented and byte oriented framing
■ Independent power supply pins for analog, digital and transmitter modules
■ Internal oscillator buffer optimized for low phase jitter enables 13.56 MHz quartz
   connection
■ Clock frequency filtering
■ 3.3 V to 5 V operation for transmitter in short range and proximity applications
■ 3.3 V or 5 V operation for the digital module

Applications
■ Electronic payment systems
■ Identification systems
■ Access control systems
■ Subscriber services
■ Banking systems
■ Digital content systems