Reference Manual

Flex CPU Piggyback Board Hardware Reference
Connector Pinouts 15
CONNECTOR PINOUTS
J8 JRS232 (10-Pin Connector)
Front View
Pin # Symbol Function Description Notes
1 N.C. No Connect
2 DTR Bidirect Data Terminal Ready Tied to DSR
3 TXD/ Input Receive Data Host transmit data
4 CTS Input Clear to Send Host ready bit
5 RXD/ Output Send Data Host receive data
6 RTS Output Request to Send PMAC ready bit
7 DSR Bidirect Data Set Ready Tied to DTR
8 N.C. No Connect
9 GND Common PMAC Common
10 +5V Output +5VDC Supply Power supply out
The JRS232 connector provided with Option 9T on a Turbo PMAC is an auxiliary serial port that can be
used independently of the standard main serial port and other communications ports. It can be connected
with a straight-across flat cable to a DB-9 connector with the standard RS-232 pinout.