ST STRFNFCA User Manual

Near field communication transceiver

VFQFPN32 5x5 mm

Features

■ Operating modes supported:

– Reader/Writer – Card Emulation – Peer-to-Peer

■ Hardware features

– Dedicated internal frame controller – Highly integrated Analog Front End (AFE)

for RF communications

– Transmission and reception modes

■ RF communication @13.56 MHz

– ISO/IEC 14443 Type A and B in Reader

and Card Emulation modes – ISO/IEC 15693 in Reader mode – ISO/IEC 18092 in Reader and Card

Emulation modes

■ Communication interfaces with a Host

Controller – Serial peripheral interface (SPI) Slave

interface up to 2 Mbps – Universal asynchronous

receiver/transmitter (UART) up to 2 Mbps

■ 32-lead, 5x5 mm, very thin fine pitch quad flat

(VFQFPN) ECOPACK® package

STRFNFCA

Data brief

Applications

Typical protocols supported:

■ ISO/IEC 14443-3 Type A and B cards and tags

■ ISO/IEC 15693 and ISO/IEC 18000-3M1 tags

■ NFC Forum tags: Types 1, 2, 3 and 4

■ ST Dual Interface EEPROM

Typical STRFNFCA applications include:

■ Handheld readers (OTP, PIN pad, POS)

– E-payment, physical access control,

transport, and government

■ PC-Link (USB /Serial/PCMCIA)

– E-payment, security access &

authentication, data exchange)

■ USB token

– Security access & authentication, data

exchange

■ Integrated solution (chipset)

■ Keyboard, laptop, set top box, printer, TV, etc.

■ E-payment, data exchange, Bluetooth pairing,

security access

December 2011 Doc ID 022168 Rev 6 1/10

For further information contact your local STMicroelectronics sales office.

www.st.com

Description STRFNFCA

STRFNFCA

Host

Interrupt Management

SPI

UART

Controller

(MCU)

1 Description

The STRFNFCA is an integrated transceiver IC for contactless applications.

The STRFNFCA manages frame coding and decoding in Reader, Card Emulation and Peer-to-Peer modes for standard applications such as near field communication (NFC), proximity and vicinity standards.

The STRFNFCA embeds an Analog Front End to provide the 13.56 MHz Air Interface.

The STRFNFCA supports ISO/IEC 14443 Type A and B in Reader and Card Emulation modes, ISO/IEC 15693 (single or double subcarrier in Reader mode only) and ISO/IEC 18092 protocols in Reader and Card Emulation modes.

The STRFNFCA also supports the reading of NFC Forum Type 1, 2, 3 and 4 tags.

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK

Figure 1. STRFNFCA application overview

packages, depending on their level of environmental compliance. ECOPACK®

is an ST trademark.

2/10 Doc ID 022168 Rev 6

STRFNFCA Description

STRFNF CA

Frame Controller

AFE IP

Configurat ion

Card Emulator 14443A/B 18092

Reader 14443A/B 15693 18092

Digit al

Field

Detec tor

Time r Accelerators

Encoder/DecoderFIFO

AFE

Signal

Mux

Mod/

Demod

Fie ld

Detector

Status

registers

User interfac e

(Set @ POR) SPI: MISO, MOSI, SS, and SCK UART: RX and TX IRQ co ntro l

Power & Cl ock

Management

Host

(User

side)

Xin Xout

TX1

TX2

RX2

RX1

IO_1 IO_8

VPS_TX

GND_ TX

VPS_Main GND_Dig

GND_RX

27.12 MHz

1.1 Block diagram

Figure 2. STRFNFCA block diagram

1.2 List of terms

Table 1. List of terms

Term Meaning

DAC Digital analog converter

GND Ground

HFO High frequency oscillator

LFO Low frequency oscillator

MCU Microcontroller unit

RFU Reserved for future use

SPI Serial peripheral interface

REF

UART Universal asynchronous receiver-transmitter

WFE Wait for event

Low frequency period

Reference time

Doc ID 022168 Rev 6 3/10

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