LG PRADA KE850 - In-Call Functions; During a Call; Answering Incoming Calls; Rejecting Incoming Calls

3. TECHNICAL BRIEF
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3.2.7. GPIO map
Over a hundred allowable resources, KE850 is using as follows except dedicated to SIM and Memory.
KE850 GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level,
is shown in below table.
Table 5 S-Gold2 GPIO pin Map
Port function KE850 Description
Signal Name
KP_IN0 KP_IN0 Refer to Key Matrix Sheet
KP_IN1 KP_IN1 "
KP_IN2 KP_IN2 "
KP_IN3 KP_IN3 "
KP_IN4 KP_IN4 "
KP_IN5 KP_IN5 "
GPIO_06 FM_SND_SEL Output, Analog S/W Control FM Radio and Sound
KP_OUT0 KP_OUT0 "
KP_OUT1 KP_OUT1 "
USART0_RXD RXD_0 UARTO, RS232 Data
USART0_TXD TXD_0 UARTO, RS232 Data
USART0_RTS_N CTS_0 UARTO, RS232 RTS
USART0_CTS_N RTS_0 UARTO, RS232 CTS
CC1CC6IO FM_INT For FM Radio Interrupt
USART1_RXD RX_DEBUG For debugging RX
USART1_TXD TX_DEBUG For debugging TX
GPIO_18 TF_PWR_EN For Current Consumption on insulting T-Flash.
GPIO_19 KEYBACKLIGHT Using GPIO like CE500, Instead of KEYLED
of SM-Power,
USB_DPLUS USBDP USB data
USB_DMINUS USBDM USB data