18Pin Interface Connector - LG GM310 Service Manual

3.15 18PIN Interface connector

[Table 3.15-1] PIN assign
Pin Function
1 FM_ANT
2
3 JACK_TYPE
4 L_OUT
5 R_OUT
6 USB_DP
7 USB_DM
8 EXT_SPK_DETECT
9 VBAT
10 VABT
11 RPWRON_EN
12 VCHG
13 VCHG
14 DSR
15 USB_VCHG
16 UART_TX
17 UART_RX
18 GND
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Only for training and service purposes
Description
FM radio antenna / Audio ground
Not used
Accessory type detect
External Speaker Left sound
External Speaker Right sound
USB DP
USB DM
External Speaker Detect (active low)
Battery voltage
Battery voltage
Remote power on (active high. 2.8V)
Charger voltage
Charger voltage
DSR
USB VBUS
UART TX data
UART RX data
Power GND
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3. BB Circuit Technical brief
GM310f service manual
LGE Internal Use Only