XMOS XK-AUDIO-316-MC-AB, Hardware Manual, Page: 17 / 26

xcore.ai Multichannel Audio Board 1v1 Hardware Manual
13 General purpose user interface
4 green LEDs and 3 buttons are provided for general purpose user interfacing.
The figure below shows the layout of the user interface subsection:
Figure 19:
User interface
components
The signal mapping of the user interface components is shown in Figure 20
Board Net xCORE GPIO Port Description
LED_0 X0D28 P4F0 LED Output 0. Set high to light LED.
LED_1 X0D29 P4F1 LED Output 1. Set high to light LED.
LED_2 X0D30 P4F2 LED Output 2. Set high to light LED.
LED_3 X0D31 P4F3 LED Output 3. Set high to light LED.
BUT_0 X0D26 P4E0 Button input 0. High = not pressed.
BUT_1 X0D27 P4E1 Button input 1. High = not pressed.
BUT_2 X0D32 P4E2 Button input 2. High = not pressed.
Figure 20:
User interface
GPIO
14 I2C bus address map
Due to a conflict in I2C slave addresses, two I2C buses are used on the board. These
buses are multiplexed onto the xcore.ai I2C bus using a PCA9540B 2-channel I2C-bus
multiplexer. This allows the I2C bus to be used (0 or 1) to be selected over I2C.
I2C slave address (7 bit) Device
0x70 NXP PCA9540B 2-channel I2C-bus multiplexer
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