User Manual

MeiG_SLM550_Hardware Design Manual
MeiG Smart Technology Co., Ltd 25/89
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