Figure 37. I/O Expander Schematic Diagram - ST STM32L476G-EVAL User Manual

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Figure 37. I/O expander schematic diagram

R229 C134
100K 100nF
PG14
I2C_SCL
PG13
I2C_SDA
PG15 R228 0
IOExpander_INT
JOY_SEL
JOY_DOWN
JOY_LEFT
JOY_RIGHT
JOY_UP
SmartCard_RST
SmartCard_CMDVCC
SmartCard_3/5V
VDD
100nF
IOExpander1
VDD
U32
6 1
VCC Y- IOExpander_Y-
14 16
Vio X- IOExpander_X-
10 15
GND Y+ IOExpander_Y+
4 13
SCLK X+ IOExpander_X+
5 12
SDAT IN3
2 11
INT IN2 LED4
7 9
Data in IN1
3 8
A0/Data Out IN0 LED2
STMPE811QTR
I2C device address:0x82 R239
100K
IOExpander2
U33
1 10
GPIO0 GPIO8 SmartCard_OFF
2 11
GPIO1 GPIO9 BL_Control
3 12
GPIO2 GPIO10 EXT_RESET
4 13
GPIO3 GPIO11
5 14
GPIO4 GPIO12
6 15
GPIO5 GPIO13
7 16
GPIO6 GPIO14
8 17
GPIO7 GPIO15
19 22
SCL INT
20
SDA
24 R243 10K
A2
21 23 R232 10K
VCC A1
9 18 R230 10K
GND A0
C132 25
TAB
STMPE1600QTR R231 R233 R237
[N/A] [N/A] [N/A]
VDD
Default I2C Address:1000010X
Title: IO_Expandor
Project: STM32L476G-EVAL
Size: A3 Reference: MB1144 Revision: B-02
Date: 6/24/2015 Sheet: 6 of 25