LG CE110 Service Manual page 28

3.3.5 UART Interface
CE110 has Three UART Drivers as follow :
- UART1 : USB - UART2 : ETM, Calibration - UART3 : AT command, Fax_modem, Bluetooth
UART1(USB)
Resource
USB_DP
USB_DM
USB_PWR
VBUS
UART2 (ETM)
DEBUG_RX
DEBUG_TX
UART3 (Bluetooth)
UART3_RXD
UART3_TXD
UART3_RTS
UART3_CTS
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Only for training and service purposes
Name
DP
DM
POWER
VBUS
RX
TX
UART3_RXD
UART3_TXD
UART3_RTS
UART3_CTS
<Table.2> UART Interface Spec
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3. Circuit Description
Description
Data
Data
USB_POWER
USB_Detect
Receive Data(UART2)
Transmit Data(UART2)
Receive Data
Transmit Data
Request To Send
Clear To Send
LGE Internal Use Only