Connector - SCSI Internal (Single-ended)

SCSI=Small Computer System Interface.
Based on an original design by Shugart Associates. SCSI wasratified in 1986.

50 PIN IDC MALE at the controller & harddisk.
50 PIN IDC FEMALE at the cable.

	(at the cable.)
	(at the controller & harddisk)

Pin	Name	Direction	Description
2	DB0	---	Data Bus 0
4	DB1	---	Data Bus 1
6	DB2	---	Data Bus 2
8	DB3	---	Data Bus 3
10	DB4	---	Data Bus 4
12	DB5	---	Data Bus 5
14	DB6	---	Data Bus 6
16	DB7	---	Data Bus 7
18	PARITY	---	Data Parity (odd Parity)
20	GND	---	Ground
22	GND	---	Ground
24	GND	---	Ground
26	TMPWR	---	Termination Power
28	GND	---	Ground
30	GND	---	Ground
32	/ATN	Input	Attention
34	GND	---	Ground
36	/BSY	---	Busy
38	/ACK	Input	Acknowledge
40	/RST	---	Reset
42	/MSG	Output	Message
44	/SEL	---	Select
46	/C/D	Output	Control/Data
48	/REQ	Output	Request
50	/I/O	Output	Input/Output

Note: Direction is Device relative Bus (other Devices).

All odd-numbered pins, except pin 25, are connected toground. Pin 25 is left open.

Source: HW-Book 2001-06-08
Last modified: 2007-06-27 16:23:00.0
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