STM32F372VCH6 STMicroelectronics, STM32F372VCH6 Datasheet - Page 20

• Manufacturer Part Number: STM32F372VCH6
• Description: ARM Microcontrollers - MCU 32-Bit ARM Cortex M4 72MHz 256kB MCU FPU
• Manufacturer: STMicroelectronics

Specifications of STM32F372VCH6

• Product Category: ARM Microcontrollers - MCU
• Rohs: yes
• Core: ARM Cortex M4
• Data Bus Width: 32 bit

Functional overview
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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.
Group
1
2
3
4
Capacitive sensing GPIOs available on STM32F37x devices
Capacitive sensing
TSC_G1_IO1
TSC_G1_IO2
TSC_G1_IO3
TSC_G1_IO4
TSC_G2_IO1
TSC_G2_IO2
TSC_G2_IO3
TSC_G2_IO4
TSC_G3_IO1
TSC_G3_IO2
TSC_G3_IO3
TSC_G3_IO4
TSC_G4_IO1
TSC_G4_IO2
TSC_G4_IO3
TSC_G4_IO4
signal name
Doc ID 022691 Rev 3
Pin name
PA10
PA13
PA14
PC4
PC5
PB0
PB1
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA9
Group
5
6
7
8
Capacitive sensing
TSC_G5_IO1
TSC_G5_IO2
TSC_G5_IO3
TSC_G5_IO4
TSC_G6_IO1
TSC_G6_IO2
TSC_G6_IO3
TSC_G6_IO4
TSC_G7_IO1
TSC_G7_IO2
TSC_G7_IO3
TSC_G7_IO4
TSC_G8_IO1
TSC_G8_IO2
TSC_G8_IO3
TSC_G8_IO4
signal name
STM32F37x
name
PD12
PD13
PD14
PD15
PB14
PB15
PD8
PD9
PB3
PB4
PB6
PB7
PE2
PE3
PE4
PE5
Pin