ST21NFCA is a NFC function microcontroller produced by STMicroelectronics. It supports card emulation, reader/writer and peer-to-peer communication modes. It has a highly integrated analog front end (AFE) and optimized power consumption modes. It supports SIM and ST21NFCA power management functions.
The ST21NFCA is a standalone chip designed to support 13.56 MHz contactless communication, including Near Field Communication (NFC) functions in card emulation, reader/writer, and peer-to-peer modes. It integrates an enhanced 8/16-bit CPU core with embedded firmware that handles ISO/IEC standards for proximity cards and devices.
| Operating Frequency | 13.56 MHz |
|---|---|
| ROM Size | 112 Kbytes |
| RAM Size | 4 Kbytes |
| EEPROM Size | 36 Kbytes |
| Power Supply Voltage | 3V |
The device supports card emulation, reader/writer, and peer-to-peer communication.
The SPI Slave interface operates at speeds up to 1 MHz.
The microcontroller includes 112 Kbytes of ROM.