Product Name
EK-AI7931HD
Version
A
Doc No
912-13302
Date
2021/12/07
Page
11 / 20
PRODUCT USER GUIDE
www.acsip.com.tw
Table 1 Jumper settings for system power input through USB connection
Jumper
Usage
Comments
J45
External 5V power supply.
Use external power source to supply 5V voltage to
AI7931HD. Pin 1 is 5V source, Pin2 is GND.
J46
3V3 for AI7931HD.
J33
3V3 for external components.
J71
Reserve for extra 3V3 request for
other components.
J32
3V3 for external LDO (1.8V and 0.8V)
JP4
Switch VCCIO to 3V3 power domain
Select pin 1 & 2, means VCCIO use 3V3 power domain.
JP7
Switch 1V8 VCCIO from internal
PHYLDO or external LDO.
Select pin 1 & 2, means 1V8 VCCIO from external buck
component.
4.3.
Audio
The EK-AI7931HD has on-board audio connector associated with different functionalities of the board.
The detail of audio related function can refer to Table 2.
Figure 5. Audio related function
AcS
ip C
onf
ide
ntia
l
AcS
ip C
onf
ide
ntia
l
AcS
ip C
onf
ide
ntia
l