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STM32F303X6 Datasheet(PDF) 29 Page - STMicroelectronics

Part # STM32F303X6
Description  Arm® Cortex®-M4 32b MCUFPU, up to 64KB Flash, 16KB SRAM, 2 ADCs, 3 DACs, 3 comp., op-amp 2.0 - 3.6 V
PDF  124 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F303X6 Datasheet(HTML) 29 Page - STMicroelectronics

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DS9866 Rev 8
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STM32F303x6/x8
Functional overview
45
3.18
Touch sensing controller (TSC)
The STM32F303x6/8 devices provide a simple solution for adding capacitive sensing
functionality to any application. These devices offer up to 18 capacitive sensing channels
distributed over 6 analog I/Os group.
Capacitive sensing technology is able to detect the presence of a finger near an electrode
that is protected from direct touch by a dielectric (glass, plastic and others). 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 electrode 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.
Table 10. Capacitive sensing GPIOs available on STM32F303x6/8 devices
Group
Capacitive sensing group name
Pin name
1
TSC_G1_IO1
PA0
TSC_G1_IO2
PA1
TSC_G1_IO3
PA2
TSC_G1_IO4
PA3
2
TSC_G2_IO1
PA4
TSC_G2_IO2
PA5
TSC_G2_IO3
PA6
TSC_G2_IO4
PA7
3
TSC_G3_IO1
PC5
TSC_G3_IO2
PB0
TSC_G3_IO3
PB1
TSC_G3_IO4
PB2
4
TSC_G4_IO1
PA9
TSC_G4_IO2
PA10
TSC_G4_IO3
PA13
TSC_G4_IO4
PA14
5
TSC_G5_IO1
PB3
TSC_G5_IO2
PB4
TSC_G5_IO3
PB6
TSC_G5_IO4
PB7



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