UM1460
Schematics
DocID022136 Rev 5
57/67
Figure
2
9
. I/O ex
p
a
nde
r
1
1
2
2
3
3
4
4
D
D
C
C
B
B
A
A
STMicroelectronics
Title:
Number:
Rev:
Sheet
of
C.3(PCB.SCH)
Date:
7/20/2016
M
B786
13
20
STM32
20-21-45-46
G-EVAL
IO_Expandor
Y-
1
IN
T
2
A0/Data
Out
3
SCLK
4
SDAT
5
VCC
6
Data
in
7
IN
0
8
IN
1
9
GND
10
IN
2
11
IN
3
12
X+
13
Vio
14
Y+
15
X-
16
U24
STMPE811QTR
Y-
1
IN
T
2
A0/Data
Out
3
SCLK
4
SDAT
5
VCC
6
Data
in
7
IN
0
8
IN
1
9
GND
10
IN
2
11
IN
3
12
X+
13
Vio
14
Y+
15
X-
16
U29
STMPE811QTR
R135
10K
+2V8
I2
C
device
address:0x82
I2
C
device
address:0x88
+2V8
+2V8
R116
100K
R132
100K
IO_Expandor_SCK
IO_Expandor_SDA
IO_Expandor_INT
TouchS
TouchScreen_X-
TouchS
TouchScreen_Y-
EXP_
IO2
EXP_
IO3
EXP_
IO4
EXP_
IO5
EXP_
IO6
EXP_
IO7
EXP_
IO8
EXP_
IO9
EXP_
IO10
EXP_
IO11
EXP_
IO12
EXP_
IO1
R121
10K
R136
0
+2V8
R117
10K
R131
10K
+2V8
C99
100nF
C115
100nF
PB
9
PB
6
PI
2
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from