LG KG195 Service Manual page 117

7. Device Information
J3 GPIO_16 Serial display
interface data output
J2 GPIO_17 Serial display interface
address output
J1 GPIO_18 Serial display
interface clock output
K4 GPIO_19 Serial display interface
chip select 0 output
K3 GPIO_20 Serial display interface
chip select 1 output
R3 GPIO_21 Pulse width
modulated signal 1
R2 GPIO_22 Pulse width
modulated signal 2
T4 GPIO_23 Pulse width modulated
signal for buzzer
K2 GPIO_24 Parallel display interface
chip select 1 output
P5 GPIO_25 Nand-Flash
Read/Busy Flag
P4 GPIO_26 Nand-Flash Command
Latch Signal
P3 GPIO_27 Nand-Flash Address
Latch Signal
P2 GPIO_28 Nand-Flash Write
Strobe
P1 GPIO_29 Nand-Flash Read
Strobe
R4 GPIO_30 Nand-Flash Chip
select output
T2 GPIO_31 External TCXO
enable input
K16 GPIO_32 SIM card supply
power select
H15 GPIO_33 UART 3 receive data
H16 GPIO_34 UART 3 transmit data
J18 GPIO_35 UART 2 receive data
J19 GPIO_36 UART 2 transmit data
H17 GPIO_37 IrDA receive data
G15 GPIO_38 IrDA transmit data
LGE Internal Use Only
Not Used Not Used
Not Used Not Used
GPIO18_LCM_ID LCM Identification
H: TBD
L: LG LCD
Not Used Not Used
Not Used Not Used
PWM1_LCM_EN [PWM Output] LCM backlight brightness control
See MT6226 datasheet Page79
Not Used Not Used
KP_BL_PWM1 [PWM Output] Keypad Backlight Control Signal
See MT6226 datasheet Page81
Not Used Not Used
NRNB Reserve for NAND Flash
NCLE Reserve for NAND Flash
NALE Reserve for NAND Flash
NWEB Reserve for NAND Flash
NREB Reserve for NAND Flash
NCEB Reserve for NAND Flash
GPIO31_CHR_CTL [Output] Charging MOSFET Gate Drive Control
SIMSEL SIM card supply voltage select Output
BT_URXD3 BlueTooth UART_RX data Input
BT_UTXD3 BlueTooth UART_TX data Output
URXD2 Reserve for touch sensor
UTXD2 Reserve for touch sensor
Not Used Not Used
Not Used Not Used
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Only for training and service purposes