INTRODUCTION
Scope
The MF RC531 is member of a new family of highly integrated reader ICs for contactless communication at 13.56 MHz. This reader IC family utilises an outstanding modulation and demodulation concept completely integrated for all kinds of passive contactless communication methods and protocols at 13.56 MHz. The MF RC531 is pin- compatible to the MF RC500, the MF RC530 and the SL RC400.

FEATUREs
· Highly integrated analog circuitry to demodulate and decode card response
· Buffered output drivers to connect an antenna with minimum number of external components
· Proximity operating distance (up to 100 mm)
· Supports ISO 14443
· Supports MIFARE® Dual Interface Card ICs and supports MIFARE® Classic protocol
· Supports contactless communication with higher baudrates up to 424kHz
· Crypto1 and secure non-volatile internal key memory
· Pin-compatible to the MF RC500, MF RC530 and the SL RC400
· Parallel µ-Processor interface with internal address latch and IRQ line
· SPI compatible interface
· Flexible interrupt handling
· Automatic detection of the used µ-Processor interface type
· Comfortable 64 byte send and receive FIFO buffer
· Hard reset with low power function
· Power down mode per software
· Programmable timer
· Unique serial number
· Bit- and byte-oriented framing
· Internal oscillator buffer to connect 13.56 MHz quartz, optimised for low phase jitter
· 3.3 V to 5 V operation for transmitter (antenna driver) in short range and proximity applications
· 3.3 V or 5V operation for the digital part

APPLICATIONs
The MF RC531 is tailored to fit the requirements of various applications using contactless communication based on ISO/IEC 14443 standard where cost-effectiveness, small size, high performance with a single voltage supply are important.
  · Public transport terminals
  · Handheld terminals
  · On board units
  · Contactless PC terminals
  · Metering
  · Contactless public phones