Product manual

MSB
J8. User-configuration jumper block
11
12
9
10
7
8
5
6
3
4
13
14
1
2
Circuit board
1
2
3
4
5
6
7
8
9
10
11
– 20
SCSI ID bit 2 (MSB)
Ground
SCSI ID bit 1
Ground
SCSI ID bit 0 (LSB)
Ground
Ext. spindle sync.
Clock ground
Remote LED − 
Remote LED +
Reserved. Do not
use.
Pin
LSB
17
18
15
16
19
20
SCSI ID = 0
SCSI ID = 1
SCSI ID = 7
SCSI ID = 5
SCSI ID = 4
SCSI ID = 6
SCSI ID = 3
SCSI ID = 2
J12. Options jumper block
7
8
5
6
3
4
1
2
Circuit board
Pin Function
1 Ground
2 Parity enable
3 Ground
4 Remote start enable
5 Clock ground
6 External spindle sync.
7 Remote LED – 
8 Remote LED +
Function
Figure 7. Configuration jumpers, front view
ST3655 Family SCSI Drives Product Manual, Rev. A 25