Data Sheet

9 ADC13 AI/IO ADC13, reserve for peripherals. Also can be used as GPIO.
10 ADC12 AI/IO ADC12, reserve for keys, for example, volume +/-/phone.
11 PWM9 IO PWM9 dimming interface (by default, it is the indicator light of vo
12 PWM8 IO PWM8 dimming interface (by default, it is the indicator light of vo
14 PWM7 IO PWM7 dimming interface (by default, it is the indicator light of vo
15 PWM6 IO Used to drive the green light, reserved to be used for infrared tran
16 PWM10 IO Used to drive the red light, reserved to be used for infrared receiv
17 ROUT-P AO
Right channel, output, positive, connected to the external power a
speaker
18 ROUT-N AO
Right channel, output, negative, connected to the external power
speaker
19 LOUT-N AO
Left channel, output, negative, connected to the external power a
speaker
20 LOUT-P AO
Left channel, output, positive, connected to the external power am
speaker
21 MIC1P AI MIC1 positive, used as the input interface of AEC
22 MIC1N AI MIC1 negative, used as the input interface of AEC
23 GPIO24 IO Used to enable the power amplifier, SPK-EN
24 MIC2P AI MIC2 positive, used as the input interface of AEC
25 MIC2N AI MIC2 negative, used as the input interface of AEC
27 MIC3P AI MIC3 positive, connected to the external microphone
28 MIC3N AI MIC3 negative, connected to the external microphone
29 MIC4P AI MIC3 positive, connected to the external microphone