STM32F373C8 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STM32F373C8
STMicroelectronics
'STM32F373C8' PDF : 131 Pages View PDF
Functional overview
STM32F373xx
3.15
Fast comparators (COMP)
The STM32F373xx embeds 2 comparators with rail-to-rail inputs and high-speed output.
The reference voltage can be internal or external (delivered by an I/O).
The threshold can be one of the following:
• DACs channel outputs
• External I/O
• Internal reference voltage (VREFINT) or submultiple (1/4 VREFINT, 1/2 VREFINT and 3/4
VREFINT)
The comparators can be combined into a window comparator.
Both comparators can wake up the device from Stop mode and generate interrupts and
breaks for the timers.
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.
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.
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 STM32F373xx devices
Group
Capacitive sensing
signal name
Pin name
Group
Capacitive sensing
signal name
Pin
name
TSC_G1_IO1
PA0
TSC_G5_IO1
PB3
TSC_G1_IO2
PA1
TSC_G5_IO2
PB4
1
5
TSC_G1_IO3
PA2
TSC_G5_IO3
PB6
TSC_G1_IO4
PA3
TSC_G5_IO4
PB7
TSC_G2_IO1
PA4(1)
TSC_G6_IO1
PB14
TSC_G2_IO2
PA5(1)
TSC_G6_IO2
PB15
2
TSC_G2_IO3
PA6(1)
6
TSC_G6_IO3
PD8
TSC_G2_IO4
PA7
TSC_G6_IO4
PD9
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DocID022691 Rev 7
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