SST58LM016 datasheet(19/40 Pages) SST

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Advance Information

ATA-Disk Module

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3.2 ATA-Disk Module Command Description

This section defines the software requirements and the format of the commands the host sends to the ADM. Com-

mands are issued to the ADM by loading the required registers in the command block with the supplied parame-

ters, and then writing the command code to the Command Register. The manner in which a command is accepted

varies. There are three classes (see Table 3-2) of command acceptance, all dependent on the host not issuing

commands unless the ADM is not busy (BSY=0).

3.2.1 ATA-Disk Module Command Set

Table 3-2 summarizes the ADM command set with the paragraphs that follow describing the individual commands

and the task file for each.

TABLE

3-2: ATA-DISK MODULE COMMAND SET

Class

Command

Code

FR1

1. FR - Features Register

SC2

2. SC - Sector Count Register

SN3

3. SN - Sector Number Register

CY4

4. CY - Cylinder Registers

DH5

5. DH - Drive/Head Register

LBA6

6. LBA - Logical Block Address Mode Supported (see command descriptions for use)

Check Power Mode

E5H or 98H

Execute Drive Diagnostic

90H

Format Track

50H

7. Y - The register contains a valid parameter for this command.

-Y

8. For the Drive/Head Register:

Y means both the ADC and Head parameters are used;

D means only the ADC parameter is valid and not the Head parameter.

Identify Drive

ECH

Idle

E3H or 97H

Idle Immediate

E1H or 95H

Initialize Drive Parameters

91H

Read Buffer

E4H

Read Long Sector

22H or 23H

Read Multiple

C4H

YYYY

Read Sector(s)

20H or 21H

YYYY

Read Verify Sector(s)

40H or 41H

YYYY

Recalibrate

1XH

Seek

7XH

YYY

Set Features

EFH

Set Multiple Mode

C6H

Set Sleep Mode

E6H or 99H

Stand By

E2H or 96H

Stand By Immediate

E0H or 94H

Write Buffer

E8H

Write Long Sector

32H or 33H

Write Multiple

C5H

YYYY

Write Sector(s)

30H or 31H

YYYY

Write Verify

3CH

YYYY

T3-2.0 519

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