SGS Thomson Microelectronics ST21NFCA Datasheet

Features

ST21NFCA

Near field communication microcontroller

Data Brief

ST21NFCA operating modes supported:

■ Card emulation

■ Reader

■ Peer-to-peer communication

Hardware features

■ Enhanced 8/16-bit CPU core with 16 Mbytes

linear addressable memory

■ 112 Kbytes of User ROM

■ 4 Kbytes of RAM

■ 36 Kbytes of EEPROM including 64 bytes User

OTP area

■ High integrated analog front end (AFE) for RF

transmission and reception including automatic
card and field detection modes

■ Three 8-bit timers with interrupt capability

■ Battery Off and Battery Low modes supported

in Card Emulation mode

■ Optimized power consumption modes

■ SIM and ST21NFCA power management

functions

RF communications

■ ISO/IEC 14443 A&B

■ ISO/IEC 15693

■ ISO/IEC 18000-3 Mod1

■ ECMA340 (NFCIP-1)

■ Supports FeliCa™ cards as described in

ECMA340 specification

■ All RF communications are available in card

and reader modes

VFQFPN32

Security features

■ True random number generator

■ ISO/IEC 3309 CRC calculation block

■ Unique serial number on each die

■ Hardware DES accelerator

Electrical characteristics

■ Standby current: < 75 µA (typ.)

■ Card emulation: < 8 mA in normal mode

■ Standby current for Reader mode: ~200 µA in

Card Detection mode

■ Reader mode: < 70 mA (typ.)

■ 3V power supply

■ Supports Class B and C for UICC

Software features

■ Includes all drivers supporting the handling and

host protocols for contact and contactless
interfaces

■ Includes complete firmware driving switch

modes between operating modes and host
controller interface functions (HCI)

Validation tools

An evaluation and debugging board is available
for complete integration.

Communication interfaces

■ Single Wire Protocol (SWP) interface

2

■ I

C Slave interface

■ SPI Slave interface

■ Asynchronous receiver transmitter ISO/IEC

7816-3 master interface supporting T=0 and
T=1 protocols

February 2008 Rev 1 1/6

For further information contact your local STMicroelectronics sales office.

www.st.com

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Description ST21NFCA

1 Description

The ST21NFCA is a single chip designed for supporting 13.56 MHz contactless
communication, including Near Field Communication (NFC) functions in the three operating
modes: card emulation, reader and peer-to-peer communication.

The ST21NFCA is designed for an optimized integration on a mobile phone with the
communication links shown in Figure 1.

Figure 1. Mobile phone communication links

This product is based on an advanced Smartcard ST21 microcontroller with 36 Kbytes of
EEPROM, 112 Kbytes of User ROM and 4 Kbytes of RAM and includes an integrated RF
Analog Front End (AFE) supporting all the contactless proximity (ISO/IEC 14443, Calypso
V1 Radio Protocol (B'), ECMA340 (NFCIP-1), and vicinity (ISO/IEC15693, ISO/IEC18000­3Mod1) standards.

The ST21NFCA system-on-chip combines a complete hardware capability for 13.56 MHz
contactless communication with an useful embedded firmware which handles:

● ISO/IEC 14443 A&B, Calypso V1 Radio Protocol (B'), ECMA340 (NFCIP-1), ISO/IEC

15693, ISO/IEC18000-3Mod1 in card emulation modes as well as reader modes

● Switch modes between operating modes and RF modes

● Host Controller Interface functions (HCI based on the ETSI specification)

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