13
26.
I2C System – JP13
The UEZGUI-EXP-DK Board includes one I2C mux with two expansion ports. The I2C ‘A’ bus is connected to the I2C GPIO
(4 buttons and 4 LEDs) shown below. The I2C ‘B’ bus is connected to the I2C ALS / Proximity sensor shown below. The
I2C ‘C’ and ‘D’ busses are connected to the two expansion ports J4 and J5. Each expansion port has the following pinout.
JP15 Pin Number
Description
1 – 2
3.3V
3 – 4
I2C SDA
5 – 6
I2C SCL
7 – 8
I2C Reset from µC
9 – 10
I2C IRQ to µC
11 – 12
Ground
J4 Pin Number
Description
1
3.3V
2
Ground
3
I2C Bus C SCL
4
I2C Bus C SDA
J5 Pin Number
Description
1
3.3V
2
Ground
3
I2C Bus D SCL
4
I2C Bus D SDA
