Introduction
This Objective short data sheet describes the functionality of the controller IC PN544. It includes functional and electrical specifications. A complete specification will be given in the product data sheet.

General description
The PN544 is a highly integrated NFC controller IC for contactless communication at 13.56 MHz. This controller IC utilizes an outstanding modulation and demodulation concept for different kinds of contactless communication methods and protocols at 13.56 MHz.
The PN544 supports active mode for NFC-IP1 transmission modes. Passive mode is also supported where PN544 can act either as contactless reader or emulate an contactless card.
When configured in card emulation mode, PN544 supports both integrated Mifare Classic solution (optional) and all card modes supported by both PN544 and present phone SIM or separate secure element. Supported modes are pictured on this page.
Enabled in PCD mode for ISO/IEC 14443 Type A the PN544’s internal transmitter part is able to drive a PCD antenna designed to communicate with ISO/IEC 14443 Type A 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 ISO/IEC 14443 Type A compatible cards and transponders. The digital part handles the complete ISO/IEC 14443 Type A framing and error detection (Parity & CRC).
The PN544 supports Mifare Classic (e.g. Mifare Standard) products.
Enabled in PCD mode for FeliCa, the PN544 controller IC supports the FeliCa communication scheme. The receiver part provides a robust and efficient implementation of the demodulation and decoding circuitry for FeliCa coded signals. The digital part handles the FeliCa framing and error detection like CRC. The PN544 supports contactless communication using FeliCa Higher transfer speeds up to 424 kbit/s in both directions.

Features
■ Low power HT80C51 MX CPU core with 72 KBytes ROM, 44 KBytes non-volatile memory for code, 8 KBytes non-volatile memory for data and 4 KBytes RAM
■ Buffered output drivers to connect an NFC antenna with minimum number of external components
■ Integrated configurable Polling Loop for automatic device discovery
■ Integrated data mode detector for automatic anticollision
■ Integrated non-volatile memory to store data and executable code for customization
■ Flexible clock supply concept to facilitate PN544 integration
   ♦ Integrated FracNPLL to make use of cellular reference clock
   ♦ 27.12 MHz direct clock input to minimize current consumption (integrated FracNPLL disabled)
   ♦ Internal oscillator to connect an 27.12 MHz crystal (in case of absent reference clock, then FracNPLL is disabled to minimize current consumption)
■ Flexible power supply concept to facilitate PN544 integration
   ♦ Integrated power management unit to be directly connected to a mobile battery
   ♦ 2.3 to 5.5 V power supply
   ♦ Fully configurable power behavior
■ Supporting various power saving modes per embedded firmware
   ♦‹ Automatic host wake up via host control interface interfaces when PN544 is in Standby power saving mode
■ Integrated self test to test external antenna matching circuit
■ Highly integrated analog circuitry to modulate, demodulate, encode requests and decode responses
■ Integrated RF Level detector
■ Typical operating distance in PCD mode for communication to a ISO 14443A/Mifare, ISO14443B, NFC-IP1 passive target or FeliCa card up to 50 mm depending on the antenna size and tuning and power supply
■ Typical operating distance in VCD mode for communication to a ISO/IEC 15693/ICODE TAG more than 50 mm depending on the antenna size and tuning, power supply and form factor of the TAG
■ Typical operating distance in ISO14443A/Mifare, ISO14443B, Type B’ or FeliCa card emulation mode of about 100 mm depending on the antenna size and tuning and the external field strength
■ Supports Mifare Classic encryption in reader/writer mode
■ Various host control interfaces
   ♦ SPI interface
   ♦ I2C interface
   ♦ High Speed Asynchronous Serial UART
■ Various interfaces to secure companion chip
   ♦ NFC-WI according to ECMA 373 standard
   ♦ SWP
■ Flexible interrupts using IRQ pin
■ Power switch for secure companion chip
■ Freely programmable general purpose IO ports