Audio Clocking; Buttons, Leds And Other Io - XMOS xCORE-200 Multi-channel Audio board Design Manual

USB Audio Design Guide

2.2.3 Audio Clocking

The board provides a low-jitter clock-source, an 24.576MHz oscillator, to serve as
reference clock to the CS2100-CP (Cirrus Logic) Fractional-N PLL (U22).
The CS2100 generates a low-jitter output signal that is distributed to the xCORE-
200 device and DAC. The CS2100 device is configured using the I2C interface.

2.2.4 Buttons, LEDs and Other IO

The board has 13 LEDs that are controlled by the xCORE-200 GPIO. The layout of
the LEDs is shown in Figure 3.
MIC5
Figure 3:
xCORE-200
Microphone
Array Board
LED
Arrangement
LED 0 to LED 11 (D2-D13) are positioned around the edge of the board, one
each side of every microphone. LED 12 (D14) is positioned next to the middle
microphone.
XM0088546.1
MIC6
D12
D11
D10
D9
MIC4
D13
xCORE-200
XUF216
D14
A B C
D8 D7
D2
MIC1
D3
D
D6
MIC3
12/110
D4
MIC2
D5