Figure 12: FFD 3.5” Ultra320 SCSI 68-pin Auxiliary Connector Settings
Table 36: 68-Pin Auxiliary Connector Signals
SFF-80091 Auxiliary
Connector Pin No.
Signal Signal
Function
1
SCSI ID (0)
Sets the SCSI ID. Set SCSI ID (0) to ON by connecting a
jumper between pins 1-2.
2
External Fault LED
Connects the LED to indicate a unit fault. The LED
illuminates during power-up diagnostics and whenever the
FFD detects a fault. Can be used even if SCSI ID (0) is ON.
3
SCSI ID (1)
Sets the SCSI ID. Set SCSI ID (1) to ON by connecting a
jumper between pins 3-4.
4 Ground
Ground.
5
SCSI ID (2)
Sets the SCSI ID. Set SCSI ID (2) to ON by connecting a
jumper between pins 5-6.
6 Ground
Ground.
7
SCSI ID (3)
Sets the SCSI ID. Set SCSI ID (3) to ON by connecting a
jumper between pins 7-8.
8
External Busy
(Activity) LED
Connects the LED to indicate a busy unit (SCSI busy). The
LED illuminates during power-up diagnostics and whenever
the FFD is performing commands. Can be used even if
SCSI ID (3) is ON.
9 Termination
ON
Enables termination to the FFD by connecting auxiliary pin
9 to Ground.
10 Ground
Ground.
11
+5V DC
+5V DC (Output voltage up to 1 Amp).
12 Write
Protect
Sets the FFD as a read-only drive. Enables write protect to
the FFD by connecting auxiliary pin 12 to Ground (for
example, pin 10).
Notes: 1.
SFF Committee, SFF-8009 Specification for Unitized Connector for Cabled
Application Rev. 4.2 October 10, 2000.
2.
Current for the external LED complies with the SFF-8009 standard. “When
asserted, this signal shall present a DC impedance of 150 ohms
±
20% to ground.”
The FFD design provides a current-limiting resistor inside the drive yielding 3- mA.
It is appropriate for all common LEDs without an external resistor.
51
Product Specification and User Manual FFD 3.5" Ultra320 SCSI
43-PS-0305-00 Rev. 2.0
