Schematics
UM10
18
4
2
/4
4
D
oc
ID
1
8141
R
e
v
1
Figure 26.
Touch sensing
1
1
2
2
3
3
4
4
D
D
C
C
B
B
A
A
STMicroelectronics
Title:
Number:
Rev:
Sheet of
B.3(PCB.SCH)
Date:
10/13/2010
MB819
14
14
STM32L152-EVAL Touch Sensing
C11
GRM3195C1H333JA01D
C18
[N/A]
R13
10K
R14
10K
R23
[N/A]
R22
[N/A]
R24
[N/A]
TS_LOAD
TS1
TS2
TS_SHIELD
TS_CT
TS1
TS_PAD
TS2
TS_PAD
R29
0
PB2
PC6
PC7
PC8
PC9
<----ESD resistor close to MCU pad
<----Touch Sensing diameter 10mm min on active shield diameter 12mm min
<----Active shield
Mount for RC mode by default
Mount only for Charge transfer mode--->
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