18
SMO-F551 Technical Guide and Specifications
Sony Corporation 1998
Table 2.1 : Functional Switch Connector Pin Assignments
A1
SCSI ID2
B1
GND
A2
SCSI ID1
B2
GND
A3
SCSI ID0
B3
GND
A4
Disable SCSI Parity
B4
GND
A5
Disable Write Cache
B5
*
Reserved
A6
Disable Auto Spin-up
B6
*
Reserved
A7
Force Verify for Write command
B7
*
Reserved
A8
Disable Manual Eject
B8
*
Reserved
A9
Enable Fast SCSI
B9
*
Reserved
A10
Device Type
B10
*
Reserved
A11
Enable Termination
B11
GND
A12
Terminator Power
B12
Terminator Power Source
SCSI ID2, 1, 0
These pins are used for setting the SCSI ID of the drive. The
following table describes the setting combinations of SCSI ID.
Table 2.2 : SCSI ID Setting
Connector Pin
SCSI ID
A1/B1
A2/B2
A3/B3
0
OFF
OFF
OFF
1
OFF
OFF
ON
2
OFF
ON
OFF
3
OFF
ON
ON
4
ON
OFF
OFF
5
ON
OFF
ON
6
ON
ON
OFF
7
ON
ON
ON
* This pin is NOT directly connected to the GND. Do not use this pin as GND. SMO-F551 drives the signal to
GND level depending on the functional switch setting. Otherwise, the signal is not driven to GND level.
