User's Manual

MeiG hardware design guide
18
GPIO10_TP_I2C3_SDA
82
I/O
The capacitive touch I2C interface
needs to be pulled up
toVREG_L5_1P8
GPIO11_TP_I2C3_SCL
81
I/O
GPIO65_TP_INT_N
79
I
Interrupt
GPIO64_TP_RST_N
80
O
Reset
VREG_L17_2P85
112
O
2.8V Power
Note: The interface definition of the capacitive touch can be adjusted by software, and the user can change the GPIO
and I2C according to the design needs.
4.9 Audio Interface
The module provides three analog audio inputs, MIC_IN1_P/M for the main microphone, MIC_IN2_P
for the microphone, and MIC_IN3_P for the noise reduction microphone. The module also provides
three analog audio outputs (HPH_L/R, REC_P/N, SPK_P/N). The audio pin is defined as follows:
Table 4.8: Audio Pin Foot Definitions
Name
Pin
Input/Output
Description
MIC_IN1_P
35
I
Main MIC positive
MIC_IN2_P
36
I
Headphone MIC positive
GND_MIC
34
I
Headphone MIC, noise reduction MIC negative
MIC_IN3_P
37
I
Noise reduction MIC positive
CDC_HPH_R
38
O
Headphone right channel
CDC_HPH_L
40
O
Headphone left channel
CDC_HS_DET
45
I
Headphone plug detection
CDC_HPH_REF
39
I
Headphone reference ground
CDC_EAR_M
42
O
Earpiece output negative
CDC_EAR_P
41
O
Earpiece output positive
SPKR_DRV_M
44
O
Amplifier (0.85W) output negative
SPKR_DRV_P
43
O
Amplifier (0.85W) output positive
Users are advised to use the following circuit according to the actual application to get better sound
effects.