Hardware Reference
3-4 Copyright ©2001-2003. All rights reserved. ARM DUI 0163B
The serial interface uses a 9-pin D-type male connector for which the pin numbering is
shown in Figure3-2.
Figure3-2 Serial connector pinout
Table3-2 shows the signal assignment for the connector.
Note
The serial interfaces signals operate at RS232 signal levels.
Serial port functionality corresponds to the DTE configuration.
Table3-2 Serial connector signal assignment
Pin J18 Type Description
1SER_DCD Input Data carrier detect
2SER_RXD Input Receive data
3SER_TXD Output Transmit data
4SER_DTR Output Data terminal ready
5SER_GND Input ground
6SER_DSR Input Data set ready
7SER_RTS Output Ready to send
8SER_CTS Input Clear to send
9SER_RI Input Ring indicator