June 2010

Doc ID 15550 Rev 2

1/21

AN2957

Application note

Implementing an RC5 infrared transmitter

using the IR timer modulator of the STM8L10x microcontroller

Introduction

IR (infrared) light is a popular means of wireless communication for remote control

applications. Many different protocol standards such as RC5, RC5x, RC6,… exist for

transmitting commands via an infrared wireless interface.

This application note describes the widely-used RC5 coding scheme from Philips and

presents a full working solution that implements a remote control device.

This application uses the STM8L10x microcontroller, it contains a powerful hardware

modulator called IRTIM that combines signals from two internal timers to drive the IR

interface. This feature makes the microcontroller especially well suited for applications that

require IR signal generation capability.

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