October 2010

Doc ID 17784 Rev 1

1/24

AN3255

Application note

Building an RFID short-range reader

using the STM8S-DISCOVERY

Application overview

High frequency 13,56 MHz RFID solutions offer ideal close-proximity identification for

product authentication, parcel tracking, document management, library and ticketing

applications.

This application note describes how to build an RFID (radio frequency identification) short-

range reader using STMicroelectronics STM8S-DISCOVERY and ISO14443 type-B CR14

bus.

The resulting RFID reader can exchange data with ISO 14443-2 type-B proximity PICCs

(proximity integrated coupling cards) also called tags. Communications are possible only

when the tags are present in the electromagnetic field generated by the reader built-in

antenna.

Once the STM8S-DISCOVERY is powered up through a USB cable connected to the host

PC, an electromagnetic field is generated by the RFID reader. A beep is emitted and the

LED LD1 briefly lights up when an ISO 14443-2 type-B proximity tag is detected by the

reader and its unique identifier (UID) successfully read.

The STM8S-DISCOVERY can be used to evaluate the main features of all STM8S MCUs,

even if it is built on an STM8S105C6T6.

Reference documents

Gerber files.

and CRC management”

EEPROM and anti-collision functions”

the CRX14 coupler” (AN1806)

These documents can be downloaded from http://www.st.com.

www.st.com