Yamaha P-250 Owner's Manual page 21

Type of serial cables and pin assignments
Depending on the type of computer you connect, use
one of the following serial cables:
Windows (with a 9-pin D-sub serial port)
8-pin mini DIN plug
(Yamaha CCJ-PC2 or equivalent)
1
mini DIN
2
8-pin
3
4
8
5
Macintosh
System peripheral plug
(Yamaha CCJ-MAC or equivalent)
mini DIN
1
2
8-pin
3
4
5
6
7
8
Pin assignment
The following diagram shows the pin assignments for
each cable.
Pin numbers (view from front)
mini DIN 8-pin
6 7 8
3 4 5
1 2
D-sub 9-pin plug
8 (CTS)
D-sub
7 (RTS)
9-pin
2 (RxD)
5 (GND)
3 (TxD)
8-pin plug
mini DIN
2 (HSK i)
1 (HSK O)
8-pin
5 (RxD-)
4 (GND)
3 (TxD-)
8 (RxD+)
7 (GP-)
6 (TxD+)
D-sub 9-pin
5 4 3 2 1
9 8 7 6
Connecting to External Devices
21
P-250