Fujitsu MAW3147NC/NP manual Each mode setting, 2 Setting SCSI terminator power supply NP model

5.3.2Each mode setting

(1)Setting terminator power supply

Refer to Table 5.2 for controlling the supply of power from the drive to the SCSI terminator power source (TERMPOW).

For information on NP model, refer to Figures 5.2 and 5.3.

Table 5.2 Setting SCSI terminator power supply (NP model)

Supply on/off of SCSI terminator power	Pin pair 23/24 of CN2
from the HDD	(TRMPOW/TRMPOW)
Supply off	Open
Supply on	Short (*1)
*1. Set at factory shipment.

For NC model, the function of the terminator power supply setting is not supported.

(2)Motor start mode

Set how to control the starting of the HDD spindle motor according to Table 5.3. This setting only determines the operation mode when the power supply is turned on or the microcode is downloaded. In both modes, stopping or restarting the spindle motor can be controlled by specifying the START/STOP UNIT command.

Table 5.3 Motor start mode setting

	NC model (*3)		NP model
Start timing of the spindle motor
	Pin 38 of CN1	Pin 78 of CN1	Pin pair 11/12 of
			CN2
	(RMT START)	(DYLD START)
			(GND/RMSTART)
Starting of the motor is controlled
with the START/STOP UNIT	Short	Open or Short	Open
command.
The motor is started immediately after
the power supply is turned on or after	Open	Open	Short (*1)
the microcode is downloaded.
The motor is started after the elapse
of a delay time that is based on the
SCSI ID. The delay time is provided	Open	Short	(*2)
immediately after the power supply is
turned on or after the microprogram is
downloaded.

*1. Set at factory shipment.

*2. For NP model, delay starting of spindle motor is supported by the CHANGE DEFINITION command only.

*3. To set the setting terminals on NC models to short, apply voltage ranging between-0.3 V and 0.8 V to the setting terminals externally. To set the setting terminals on NC models to open, apply voltage ranging between 2.0 V and 5.5 V to the setting terminals from an external source.

Refer to Subsection 3.1.10 “START/STOP UNIT (1B)” of the SCSI Logical Interface Specifications for details of the START/STOP UNIT command.

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