LG MG180C Service Manual page 25

3. H/W Circuit Description
Resource
TX_MODEM
RX_MODEM
CTS_MODEM
RTS_MODEM
GPIO 3
UART MODEM (UART1)
Name
TXD
RXD
CTS
RTS
DSR
Table 3-5. UART Interface spec.
- 24 -
Description
Transmit Data
Receive Data
Clear To Send
Request To Send
Data Set Ready