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UM1567
Table 12.
Jumper
SB17, SB18
2.9
Touch-sensing buttons
The STM32303C-EVAL evaluation board supports two touch-sensing buttons based on the
charge transfer technology.
Table 13.
Solder bridge
RS485 related solder bridges
The external failsafe biasing is enabled when solder bridges SB17 and
SB18 are closed.
Default setting: Not fitted
The bus termination is enabled when solder bridge SB16 is closed.
SB16
Default setting: Not fitted.
Touch-sensing button related solder bridges
PD13 is connected to the touch button when SB6 is open.
(Default setting)
SB6
PD13 is connected to the extension connector CN7 when SB6 is closed. In
such a case, R104 must be removed to avoid disturbance due to the touch
button.
PD15 is connected to the touch button when SB7 is open.
(Default setting)
SB7
PD15 is connected to the extension connector CN7 when SB7 is closed. In
such a case, R102 must be removed to avoid disturbance due to the touch
button.
PD12 is connected to the sampling capacitor when SB8 is open.
(Default setting)
SB8
PD12 is connected to the extension connector CN7 when SB8 is closed. In
such a case, C52 must be removed to avoid disturbance due to the
capacitor.
PB12 is connected to the shield when SB9 is open.
(Default setting)
SB9
PB12 is connected to the extension connector CN6 when SB9 is closed. In
such a case, R103 must be removed to avoid disturbance due to the
shield.
PB11 is connected to the shield charge capacitor when SB11 is open.
(Default setting)
SB11
PB11 is connected to the extension connector CN6 when SB11 is closed.
In such a case, R137 must be removed to avoid disturbance due to the
capacitor.
Doc ID 023581 Rev 2
Hardware layout and configuration
Description
Description
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