Schematics
AN3311
50/58
Doc ID 18209 Rev 1
9.6 I/O
expander
Figure 31.
I/O expander schematic
AM0
8
497v1
Y-
1
INT
2
A0/Data Out
3
SCLK
4
SDAT
5
VCC
6
Data in
7
IN0
8
IN1
9
GND
10
IN2
11
IN3
12
X+
13
Vio
14
Y+
15
X-
16
U7
STMPE811
Y-
1
INT
2
A0/Data Out
3
SCLK
4
SDAT
5
VCC
6
Data in
7
IN0
8
IN1
9
GND
10
IN2
11
IN3
12
X+
13
Vio
14
Y+
15
X-
16
U8
STMPE811
R56
10K
+3V3
I2C device address:0x82
I2C device address:0x88
+3V3
+3V3
R57
100K
R58
100K
IO_Expander_SCK
IO_Expander_SDA
IO_Expander_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
R160
10K
R159
0
+3V3
R37
10K
R164
10K
+3V3
C89
100nF
C90
100nF
PB6
PB7
PB14