STM32F303CB datasheet(28/148 Pages) STMICROELECTRONICS

28 / 148 page

Functional overview

STM32F303xB STM32F303xC

28/148

DocID023353 Rev 13

3.25

Infrared Transmitter

The STM32F303xB/STM32F303xC devices provide an infrared transmitter solution. The

solution is based on internal connections between TIM16 and TIM17 as shown in the figure

below.

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

sent. The infrared output signal is available on PB9 or PA13.

To generate the infrared remote control signals, TIM16 channel 1 and TIM17 channel 1 must

be properly configured to generate correct waveforms. All standard IR pulse modulation

modes can be obtained by programming the two timers output compare channels.

Figure 3. Infrared transmitter

3.26

Touch sensing controller (TSC)

The STM32F303xB/STM32F303xC devices provide a simple solution for adding capacitive

sensing functionality to any application. These devices offer up to 24 capacitive sensing

channels distributed over 8 analog I/O groups.

Capacitive sensing technology is able to detect the presence of a finger near a sensor which

is protected from direct touch by a dielectric (glass, plastic, ...). The capacitive variation

introduced by the finger (or any conductive object) is measured using a proven

implementation based on a surface charge transfer acquisition principle. It consists of

charging the sensor capacitance and then transferring a part of the accumulated charges

into a sampling capacitor until the voltage across this capacitor has reached a specific

threshold. To limit the CPU bandwidth usage this acquisition is directly managed by the

hardware touch sensing controller and only requires few external components to operate.

The touch sensing controller is fully supported by the STMTouch touch sensing firmware

library which is free to use and allows touch sensing functionality to be implemented reliably

in the end application.

STM32F303CB 데이터시트(PDF) 28 Page - STMicroelectronics