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UM1564
2.10
Touch sensing slider
STM32373C-EVAL evaluation board supports a touch sensing slider based on either
resistor-capacitor (RC) charging or charge transfer technology. The charge transfer
technology is enabled by default assembly.
Table 12.
Solder bridge
SB8
SB9
SB10
SB11
R93
R95
Note:
The touch slider is only fully functional when the STM32373C-EVAL is powered on Power
mode 1 (both VDD and VDDA are connected to a fixed 3.3 V power supply). When the
STM32373C-EVAL is powered on Power mode 2, it may be necessary to adjust the
capacitor value of C123 and the firmware so they are adapted to a voltage range of 2.0 V to
3.6 V of VDD. The touch slider is not functional when the STM32373C-EVAL is powered on
Power mode 3 because some IOs are also powered by the VDDA domain.
Touch sensing slider-related solder bridges
When SB8 is open, PD15 is connected to the sampling capacitor.
This is the default setting.
When SB8 is closed, PD15 is connected to the extension connector CN14. In this
case, C7 must be removed to avoid disturbance due to the capacitor.
When SB9 is open, PD14 is connected to the touch slider.
This is the default setting.
When SB9 is closed, PD14 is connected to the extension connector CN14. In this
case, R11 must be removed to avoid disturbance due to the touch slider
When SB10 is open, PD13 is connected to the touch slider.
This is the default setting.
When SB10 is closed, PD13 is connected to the extension connector CN14. In this
case, R12 must be removed to avoid disturbance due to the touch slider
When SB11 is open, PD12 is connected to the touch slider.
This is the default setting.
When SB11 is closed, PD12 is connected to the extension connector CN14. In this
case, R13 must be removed to avoid disturbance due to the touch slider
When R93 is un-mounted, PE4 is connected to the touch slider.
This is the default setting.
When R93 is mounted, PE4 is connected to the extension connector CN13. In this
case, R31 must be removed to avoid disturbance due to the shield.
When R95 is un-mounted, PE5 is connected to the slider.
This is the default setting.
When R95 is mounted, PE5 is connected to the extension connector CN13. In this
case, R82 must be removed to avoid disturbance due to the capacitor.
Doc ID 023566 Rev 1
Hardware layout and configuration
Description
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