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STM32F302XD Datasheet(PDF) 31 Page - STMicroelectronics

Part # STM32F302XD
Description  CRC calculation unit
PDF  168 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F302XD Datasheet(HTML) 31 Page - STMicroelectronics

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STM32F302xD STM32F302xE
Functional overview
63
Figure 3. Infrared transmitter
3.27
Touch sensing controller (TSC)
The STM32F302xD/E 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, etc.). 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.
Table 10. Capacitive sensing GPIOs available on STM32F302xD/E devices
Group
Capacitive sensing
signal name
Pin
name
- Group
Capacitive sensing
signal name
Pin
name
1
TSC_G1_IO1
PA0
-
5
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
2
TSC_G2_IO1
PA4
6
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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