AN4099 datasheet(10/39 Pages) STMICROELECTRONICS

номер детали	AN4099

подробное описание детали	Implementing transmitters and receivers for infrared remote control protocols using STM32F0xx and STM32F3xx microcontrollers

PDF	39 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

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10 / 39 page

Infrared transmitter

AN4099

10/39

Doc ID 023110 Rev 2

Infrared transmitter

2.1

Hardware considerations

The TX-IR LED is an infrared transmitter designed for infrared serial data links and remote

control applications. Data present is modulated at the selected carrier frequency of 36 kHz

or 40 kHz providing a simple, single-chip solution for infrared data communications and

remote control applications.

An infrared interface (IRTIM) for remote control is available on the STM32F0xx and

STM32F3xx devices. It can be used with an IR LED to perform remote control functionality.

The IR digital interface is designed to output a digital signal to an infrared diode driver

circuit. It can output a signal using any of the existing modulation styles, the modulation style

being dependent on the software algorithm.

The IR interface is very easy to configure and uses two signals provided by two STM32

timers (TIM16 and TIM17).

TIM17 is used to provide the carrier frequency and TIM16 provides the actual signal to be

sent.

Figure 7.

Hardware configuration for infrared transmitter

Main signal

Carrier frequency

IR LED

Transmitter

Modulated signal

MS30800V1

AN4099 датащи(PDF) 10 Page - STMicroelectronics