2021 Microchip Technology Inc. DS00003118C-Page 105
AN3118
APPENDIX W: MIC AS INPUT IN
MSPK
In embedded mode, the user can enable the
microphone as line-in input through the following
“Enable MIC Loopback As Line-in” settings. The analog
mic and digital mic can be selected in Microphone
Settings.
Then, the microphone will become the line-in source
and aux-in will become inactive. In host mode, after
disabling the line-in function by “0x13 0x01 0x00”, The
UART command “0x13 0x0F 1/0” can enable or disable
“MIC Loopback As Line-in”. Then, use “0x13 0x01
0x01” to enable line-in to use the microphone
Loopback function. Then, the microphone can be used
during MSPK mode.
FIGURE 121: CODEC SETUP
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