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AN3128 数据表(PDF) 13 Page - STMicroelectronics

部件名 AN3128
功能描述  This library is a firmware package which contains a collection
PDF  105 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN3128 数据表(HTML) 13 Page - STMicroelectronics

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AN3128
Touchscreen controller hardware description
Doc ID 16918 Rev 5
13/105
2.5
Interfacing touchscreen with microcontroller with the
STMPE811 via I2C
The STMPE811 has a simple 2-wire I2C digital serial interface which allows the user to
access the data in the touchscreen controller register at any time. It communicates via the
serial interface with a master controller.
Figure 3 shows how the STM32F10xxx microcontroller (master device) must be connected
to the STMPE811 device.
Figure 3.
Two STMPE811s in IOExpander mode
For more information on the touchscreen controller, refer to the STMPE811, datasheet,
where it is possible to find details about the registers concerning the data of the touched
points on the touchscreen.
AM08449v1
Y-
1
INT
2
A0/Data
A0/Data Out
Out
3
4
5
VC
VCC
6
Data
Data in
7
IN0
8
IN1
9
GN
GND
10
10
IN2
11
11
IN3
12
12
X+
13
13
Vio
Vio
14
14
Y+
15
15
X-
16
16
U7
ST
STMPE81
811
Y-
1
INT
2
A0/Data
A0/Data Out
Out
3
4
5
VC
VCC
6
Data
Data in
7
IN0
8
IN1
9
GN
GND
10
10
IN2
11
11
IN3
12
12
X+
13
13
Vio
Vio
14
14
Y+
15
15
X-
16
16
U8
ST
STMPE81
811
R5
R56
10
10K
+3V
+3V3
I2C devic
device address:0x8
address:0x8 2
I2C devic
device address:0x8
address:0x88
+3V
+3V3
+3V
+3V3
R5
R57
100
100K
R5
R58
100
100K
TouchScreen_X+
TouchScreen_X+
TouchScreen_X-
TouchScreen_X-
TouchScreen_Y+
TouchScreen_Y+
TouchScreen_Y-
TouchScreen_Y-
EXP
EXP_I
_IO2
EXP
EXP_I
_IO3
EXP
EXP_I
_IO4
EXP
EXP_I
_IO5
EXP
EXP_I
_IO6
EXP
EXP_I
_IO7
EXP
EXP_I
_IO8
EXP
EXP_I
_IO9
EXP
EXP_I
_IO1
O10
EXP
EXP_I
_IO1
O11
EXP
EXP_I
_IO1
O12
EXP
EXP_I
_IO1
R160
R160
10
10K
R15
R159
0
+3V
+3V3
R3
R37
10
10K
R164
R164
10
10K
+3V
+3V3
C8
C89
100n
100nF
C9
C90
100n
100nF
PB6
PB7
PB1
B14
IO_Expander_SCK
IO_Expander_SDA
IO_Expander_INT
SCLK
SCLK
SDAT
SDAT
SCLK
SCLK
SDAT
SDAT



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