Hardware pinouts information and cables schemes

SCSI Internal (Differential) pinout

hard drive connector

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50 pin IDC male connector layout

50 pin IDC male connector
at the controller & harddisk



Pin Name Dir Description
01GND---Ground
02GND---Ground
03+DB0<->+Data Bus 0
04-DB0<->-Data Bus 0
05+DB1<->+Data Bus 1
06-DB1<->-Data Bus 1
07+DB2<->+Data Bus 2
08-DB2<->-Data Bus 2
09+DB3<->+Data Bus 3
10-DB3<->-Data Bus 3
11+DB4<->+Data Bus 4
12-DB4<->-Data Bus 4
13+DB5<->+Data Bus 5
14-DB5<->-Data Bus 5
15+DB6<->+Data Bus 6
16-DB6<->-Data Bus 6
17+DB7<->+Data Bus 7
18-DB7<->-Data Bus 7
19+DBP<->+Data Bus Parity (odd Parity)
20-DBP<->-Data Bus Parity (odd Parity)
21DIFFSENS????
22GND---Ground
23res-Reserved
24res-Reserved
25TERMPWR<->Termination Power
26TERMPWR<->Termination Power
27res-Reserved
28res-Reserved
29+ATN<--+Attention
30-ATN<---Attention
31GND---Ground
32GND---Ground
33+BSY<->+Bus is busy
34-BSY<->-Bus is busy
35+ACK<--+Acknowledge
36-ACK<---Acknowledge
37+RST<->+Reset
38-RST<->-Reset
39+MSG-->+Message
40-MSG-->-Message
41+SEL<->+Select
42-SEL<->-Select
43+C/D-->+Control or Data
44-C/D-->-Control or Data
45+REQ-->+Request
46-REQ-->-Request
47+I/O-->+In/Out
48-I/O-->-In/Out
49GND---Ground
50GND---Ground

Note: Direction is Device relative Bus (other Devices)


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50 pin IDC female connector diagram

50 pin IDC female connector
at the cable

Pinouts.ru > Hard drives connectors pinouts listing >  Pinout of SCSI Internal (Differential) and layout of 50 pin IDC male connector and 50 pin IDC female connector
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Source(s) of this and additional information: Hardware Book, Karsten Wenke 0 reports
Last updated at Wed Feb 15 2006. Submit additions or corrections for this document. Is this document correct or incorrect? What is your opinion?
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