User's Manual

Turbo PMAC2 PCI Hardware Reference Manual
CPU Board Connector Pinouts 21
CPU BOARD CONNECTOR PINOUTS
J8 (JAUX232)/Auxiliary Serial Port
Pin # Symbol Function Description Notes
1 No connect
2 DTR Bidirectional Data terminal ready Tied to DRR
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 Bidirectional Data set ready Tied to DTR
8 No connect
9 GND Common PMAC common
10 +5V Output 10 +5Vdc supply Power supply out
The J8 connector on the Turbo CPU piggyback board, present if Option-9T has been ordered,
provides a second independent port for serial communications at RS-232 levels.