Terminal CNH1 (Manufactured after November 1995)
Pins Status Function
1-2 SHORT* SCSI ID select (LSB)
3-4 SHORT* SCSI ID select
5-6 SHORT* SCSI ID select (MSB)
7-8 SHORT* Spindle motor on at power up
OPEN Spindle motor controlled by START/STOP command
9-10 SHORT* Synchronous Data Transfer Mode disabled
OPEN Synchronous Data Transfer Mode enabled
11-12 SHORT* Reselection retry = unlimited
OPEN Reselection retry = 10 times
13-14 SHORT* Not used
15-16 SHORT* Active termination enabled
OPEN Active termination disabled
Terminal CN6 (Manufactured after November 1995)
Pins Status Function
2, (A0) - SCSI ID select (LSB)
4, (A1) - SCSI ID select
6, (A2) - SCSI ID select (MSB)
1,3,5,9 - Ground
7-8 - Reserved
10 - Spindle synch pulse
Terminal CNH3 (Manufactured after November 1995)
SCSI Terminating Power
1-2 3-4 Function
SHORT* SHORT* Power is supplied to the terminating resistor from the IDD and
TERMPWR pin. Power is also supplied to the TERMPWR pin from the IDD.
(Pin 26 of the interface)
SHORT OPEN The TERMPWR pin is not used. Power is supplied to the IDD
terminating resistor only from the IDD
OPEN SHORT Power is not supplied to the terminating resistor from the IDD, only
from the TERMPWR pin.
Board Layout for Drives Manufactured before November 1995
Terminal CNH1 (Manufactured before November 1995)
Pins Status Function
1-2 SHORT* SCSI ID select (LSB)
3-4 SHORT* SCSI ID select
5-6 SHORT* SCSI ID select (MSB)
7-8 SHORT* Spindle motor on at power up
OPEN Spindle motor controlled by START/STOP command
Terminal CN6 (Manufactured before November 1995)
Pins Status Function
A0 - SCSI ID select (LSB)
A1 - SCSI ID select
A2 - SCSI ID select (MSB)
7-8 - Reserved
9-10 - Reserved