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The PN531 is a highly integrated transmission module for contactless communication at 13.56 MHz including -controller functionality based on an 80C51 core with 32 kbyte of ROM and 1 kbyte of RAM.
 This c-based transmission module combines an outstanding modulation and demodulation concept completely integrated for different kinds of contactless communication methods and protocols at 13.56 MHz with an easy to use firmware for the different supported modes and the required host interfaces.
The embedded firmware handles the ISO 14443A and MIFARE reader protocol as well as the basic FeliCaTM reader protocol and the complete NFC IP-1 protocol. Furthermore the embedded firmware and the internal hardware support the handling and the host protocols for the different interfaces as - USB 2.0
- I2C
- SPI and
- Serial UART
The PN531 supports 3 different operating modes - Reader/writer mode for FeliCaTM and ISO14443A cards
- Supports Card interface mode for FeliCaTM and ISO14443A/MIFARE in combination with secure C
- NFC IP-1 mode
In reader/ writer mode the PN531s internal transmitter part is able to drive a reader/writer antenna designed to communicate with ISO14443A /MIFARE or FeliCaTM cards and transponders without additional active circuitry. The receiver part provides a robust and efficient implementation of a demodulation and decoding circuitry for signals from ISO14443A compatible cards and transponders. The digital part handles the complete ISO14443A framing and error detection (Parity & CRC). The PN531 supports MIFARE Classic (e.g. MIFARE Standard) products. The PN531 supports contactless communication using MIFARE Higher Baudrates up to 424kbit/s in both directions. In the reader/ writer mode the PN531 transmission module supports the FeliCaTM communication scheme. The receiver part provides a robust and efficient implementation of the demodulation and decoding circuitry for FeliCaTM coded signals. The digital part handles the FeliCaTM framing and error detection like CRC. The PN531 supports contactless communication using FeliCaTM Higher Baudrates up to 424kbit/s in both directions. In card mode the PN531 is able to answer a reader/writer command either in FeliCaTM or ISO14443A/MIFARE card mode. The PN531 generates the proper digital load modulated signals and with an external circuit, can respond to commands sent by the reader/writer. The PN531 offers the possibility to directly communicate with several NFC enabled devices in the NFC IP-1 mode. The NFC IP-1 mode offers different baudrates up to 424kbit/s. The PN531 handles the complete NFC framing and error detection. Downloads
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