STM32F303VC datasheet(29/133 Pages) STMICROELECTRONICS

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STM32F302xx/STM32F303xx

Functional overview

Doc ID 023353 Rev 5

29/133

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 4.

Infrared transmitter

3.25

Touch sensing controller (TSC)

The STM32F302xx/STM32F303xx 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.

TIMER 16

(for envelop)

TIMER 17

(for carrier)

PB9/PA13

MS30365V1

Table 8.

Capacitive sensing GPIOs available on STM32F302xx/STM32F303xx

devices

Group

Capacitive sensing

signal name

name

Group

Capacitive sensing

signal name

name

TSC_G1_IO1

PA0

TSC_G5_IO1

PB3

TSC_G1_IO2

PA1

TSC_G5_IO2

PB4

TSC_G1_IO3

PA2

TSC_G5_IO3

PB6

TSC_G1_IO4

PA3

TSC_G5_IO4

PB7

TSC_G2_IO1

PA4

TSC_G6_IO1

PB11

TSC_G2_IO2

PA5

TSC_G6_IO2

PB12

TSC_G2_IO3

PA6

TSC_G6_IO3

PB13

TSC_G2_IO4

PA7

TSC_G6_IO4

PB14

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