MEIG SLM500, Hardware Design Manual

Page: 19 / 78

MeiG Smart product technical information
SLM500
Hardware Design Guide
Page 19
VBAT_SNS_P 133 I
Battery voltage monitoring
PM_VIB_DRV_N 28 O
Motor negative control
ADC 128 I
Analog voltage input can be
used as ADC input
PWM 29 O
Analog voltage input can be
used as PWM input
optional
NFC_CLK 181 O
NFC Clock
NFC_CLK_REQ 182 I
Default PM215 GPIO2
CBL_PWR_N 186 I
Grounding support power on
automatic startup
BAT_ID 185 I
Battery type detection
RESERVED
150
、
151
、
152
、
173
、
174
、
175
、
178
、
179
、
180
、
183
、
184
、
192
、
232
、
242
、
246
、
249
、
252
、
253
、
254
、
257
、
263
、
270
Table 3.2
：
Pin Characteristics
PIN# SLM500 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 SPKR_OUT_P AO Class-D speaker driver output, plus
11 SPKR_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