Product Info

Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design Confidential / Released
3-25
/ 122
209
Audio Interfaces
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
MIC1P
4
AI
Microphone
positive input for
channel 1
MIC_GND
5
MIC reference
ground
MIC2P
6
AI
Microphone
positive input for
channel 2
EARP
8
AO
Earpiece positive
output
EARN
9
AO
Earpiece negative
output
SPKP
10
AO
Speaker positive
output
SPKN
11
AO
Speaker negative
output
HPH_R
136
AO
Headphone right
channel output
HPH_GND
137
AI
Headphone virtual
ground
HPH_L
138
AO
Headphone left
channel output
HS_DET
139
AI
Headset insertion
detection
High level by
default.
USB Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USB_VBUS
141, 142
PI
USB power supply
Vmax=6.3V
Vmin=4.35V
Vnorm=5.0V
Used for USB 5V
power input and
USB detection.
USB_DM
13
IO
USB differential
data bus (minus)
Compliant with USB
2.0 standard
specification.
Require differential
impedance of 90Ω.
USB_DP
14
IO
USB differential
data bus (plus)
USB_ID
16
AI
USB ID detection
High level by
default.