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STM32F372RC Datasheet(PDF) 20 Page - STMicroelectronics

No. de pieza STM32F372RC
Descripción Electrónicos  ARM Cortex-M4F 32b MCUFPU, up to 256KB Flash32KB SRAM timers
PDF  128 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F372RC Datasheet(HTML) 20 Page - STMicroelectronics

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Functional overview
STM32F37x
20/128
Doc ID 022691 Rev 3
3.16
Touch sensing controller (TSC)
The devices provide a simple solution for adding capacitive sensing functionality to any
application. Capacitive sensing technology is able to detect the presence of a finger near an
electrode 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 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.
Up to 24 touch sensing electrodes can be controlled by the TSC. The touch sensing I/Os are
organized in 8 acquisition groups, with up to 4 I/Os in each group.
Table 3.
Capacitive sensing GPIOs available on STM32F37x 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
PB14
TSC_G2_IO2
PA5
TSC_G6_IO2
PB15
TSC_G2_IO3
PA6
TSC_G6_IO3
PD8
TSC_G2_IO4
PA7
TSC_G6_IO4
PD9
3
TSC_G3_IO1
PC4
7
TSC_G7_IO1
PE2
TSC_G3_IO2
PC5
TSC_G7_IO2
PE3
TSC_G3_IO3
PB0
TSC_G7_IO3
PE4
TSC_G3_IO4
PB1
TSC_G7_IO4
PE5
4
TSC_G4_IO1
PA9
8
TSC_G8_IO1
PD12
TSC_G4_IO2
PA10
TSC_G8_IO2
PD13
TSC_G4_IO3
PA13
TSC_G8_IO3
PD14
TSC_G4_IO4
PA14
TSC_G8_IO4
PD15



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