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MeiG_SLM550_Hardware Design Manual
MeiG Smart Technology Co., Ltd
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Table 3 Pin Characteristics
PIN# SLM550 Pin name
GPIO
Interrupt
Pad
characteristics
Functional description
1
VBAT
PI,PO
Battery,3.5V-4.2V,default 3.8V
2
VBAT
PI,PO
Battery,3.5V-4.2V,default 3.8V
3
GND
GND
GND
4
MIC_IN1_P
AI
Microphone 1 input plus
5
MIC_GND
GND
Microphone bias filter ground
6
MIC_IN2_P
AI
Microphone 2 input plus
7
GND
GND
GND
8
EAR_P
AO
Earpiece output, plus
9
EAR_M
AO
Earpiece output, minus
10
LINE_OUT_P
AO
Class-D speaker driver output,
plus
11
LINE_OUT_M
AO
Class-D speaker driver output,
minus
12
GND
GND
GND
13
USB_HS_DM`
AI,AO
USB data minus
14
USB_HS_DP
AI,AO
USB data plus
15
GND
GND
GND
16
USB_HS_ID
AI
USB ID
17
UIM2_DET
GPIO75*
B-PD:nppukp
Configurable I/O,UIM2 removal
detection
18
UIM2_RESET
B-PD:nppukp
Configurable I/O,UIM2 reset
19
UIM2_CLK
B-PD:nppukp
Configurable I/O,UIM2 clock
20
UIM2_DATA
B-PD:nppukp
Configurable I/O,UIM2 data
21
VREG_L19_UIM2
PO
PMIC output for UIM2
22
GPIO79_UIM1_DET
GPIO79*
B-PD:nppukp
Configurable I/O,UIM1 removal
detection