Audio Inputs Expansion Header J50; Figure 15 J50 Audio Inputs Expansion Header; Table 3.8-9 Audio Inputs Expansion Header J50 Pin Out - Intrinsyc Lantronix Open-Q 820 User Manual

3.8.12 Audio Inputs Expansion Header J50

This header expansion provides the following audio inputs:
1. 3 digital mics
2. 3 analog mics
3. Voltage rails to support analog and digital mics
For details on how to connect analog or digital microphones to system, refer to sections 4.13.1 and 4.13.2 on
Open-Q™_820DevKit_SOM_TechNote13 (document R-3).
The table below outlines the pin out information of the audio inputs expansion header J50:
Description
Analog MIC1 positive
differential input
Analog MIC5 positive
differential input
MIC bias output voltage 1
Analog MIC6 positive
differential input
MIC bias output voltage 4
GND
Open-Q™ 820 Dev Kit User Guide

Figure 15 J50 Audio Inputs Expansion Header

Table 3.8-9 Audio Inputs Expansion Header J50 Pin out

Signal Pin
NO
CDC_IN1_P J50[1]
CDC_IN5_P J50[3]
MIC_BIAS1 J50[5]
CDC_IN6_P J50[7]
MIC_BIAS4 J50[9]
GND J50[11
]
Description
Analog MIC1 negative
differential input
Analog MIC5 negative
differential input
MIC bias output voltage 3
Analog MIC6 negative
differential input
3.3V power supply max
500mA
GND
Open-Q™ 820 Development Kit
Signal Pin
NO
CDC_IN1_N J50[2]
CDC_IN5_N J50[4]
MIC_BIAS3 J50[6]
CDC_IN6_N J50[8]
MB_VREG_3P3 J50[10]
GND J50[12]
33