SimCom SIM8905A User Manual page 18

Module
LDO17_2V85
LDO6_1V8
MIPI_CSI0_CLK_P
MIPI_CSI0_CLK_M
MIPI_CSI0_LN0_P
MIPI_CSI0_LN0_M
MIPI_CSI0_LN1_P
MIPI_CSI0_LN1_M
CAM0_MCLK
CAM0_RST_N
CAM0_PWDN
CAM_I2C_SCL
CAM_I2C_SDA
Audio
SIM8905A provides two microphone inputs and three outputs including earpiece, stereo headphones, and mono
class-D speaker driver.
Table 8: Audio interface pin definitions
Pin Name
EAR_P
EAR_M
HPH_R
HPH_GND
HPH_L
HS_DET
GND_MIC
MIC2P
MIC1P
SPK_M
SPK_P
MIC_BIAS1
MIC_BIAS2
2.2uF
2.2K
Figure 19: Primary camera reference circuit
Pin# Type
8 O Earpiece output, positive
9 O Earpiece output, negative
136 O Headphone output, right channel
137 I Headphone ground reference
138 O Headphone output, left channel
139 I Headset detection
5 P Microphone input 2 ground reference
6 I Microphone input 2, positive
4 I Microphone input 1, positive
11 O Speaker driver output, negative
10 O Speaker driver output, positive
194 O Microphone bias 1
210 O Microphone bias 2
18
Smart Machine Smart Decision
2.2uF 100nF 100nF
2.2K
Description
Primary
Camera
AGND
VCM
AVDD
DVDD
VDD_IO
GND
MCP
MCN
GND
MDP0
MDN0
GND
MDP1
MDN1
GND
MCLK
RESET
PWDN
SCL
SDA