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.

5-8

C141-E226

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Fujitsu MAW3147NC/NP manual Each mode setting, Setting Scsi terminator power supply NP model, Motor start mode setting
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