Inhibit Write When Write Protected; Allow Write When Write Protected; Head Side Select Options; Spindle Motor Control Options - Tandon TM848-1 Operating And Service Manual

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Operating and service manual (90 pages)

Table Of Contents

Table of Contents

1.18

D S A N D H L P O W E R SAVE OPTIONS

The drive is set upwith the HL option in. This stepper power from head load line option supplies power

to the stepper motor when the head load line goes low (true), which results in lower stand-by current

consumption. As shipped from the factory, HL is installed but will remove power from the stepper

motor when the d r ive is deselected. There should be a 2 0

command is given in order to allow the step motor electronics to settle.

The stepper power from drive select, DS option, allows the user to re move D. C. power from the

stepper motor using drive select, which results in lower stand-by current consumption. This option is

implemented by installing DS, and cutting HL.

1.19

US ER S E L E C TABLE OPTIONS

The description of user selectable options should be used in conjunction with the following list of

options that are available for model numbers TM848-1 and TM848-2 (see Table 1-5).

OPTION

Drive Select

Side Select Options using Drive Select

In Use, Drive Select

In Use, Head Load

Ready Alternate Output Pad

Radial Ready

Ready, Modified

Radial Index

Index, Alternate Output Pad

In Use, Alternate Output Pad

Diskette Lever Lock Latch Option

Disk Change

Two-Sided Diskette Installed

Stepper Power from Drive Select

Stepper Power from Head Load Line

Head Load Alternate Output Pad

Radial Head Load Signal