Advance Information

ATA-Disk Module

SST58SM008 / 016 / 024 / 032 / 048 / 064 / 096 / 128 / 192

SST58LM008 / 016 / 024 / 032 / 048 / 064 / 096 / 128 / 192

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©2001 Silicon Storage Technology, Inc.

S71193-01-000

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519

3.0 SOFTWARE INTERFACE

3.1 ATA-Disk Module Drive Register Set Definitions and Protocol

3.1.1 ATA-Disk Module Addressing

The I/O decoding for an ADM is as follows:

3.1.2 ATA-Disk Module Registers

The following section describes the hardware registers used by the host software to issue commands to the ADM.

These registers are often collectively referred to as the “Task File Registers.”

3.1.2.1 Data Register

This 16-bit register is used to transfer data blocks between the device data buffer and the host. It is also the register

through which sector information is transferred on a Format Track command. Data transfer can be performed in

PIO mode.

3.1.2.2 Error Register (Read Only)

This register contains additional information about the source of an error when an error is indicated in bit 0 of the

Status register. The bits are defined as follows:

Bit 7 (BBK)

This bit is set when a Bad Block is detected.

Bit 6 (UNC)

This bit is set when an Uncorrectable Error is encountered.

Bit 5

This bit is 0.

Bit 4 (IDNF)

The requested sector ID is in error or cannot be found.

Bit 3

This bit is 0.

Bit 2 (Abort)

This bit is set if the command has been aborted because of an ADM status condition:

(Not Ready, Write Fault, etc.) or when an invalid command has been issued.

Bit 1

This bit is 0.

Bit 0 (AMNF) This bit is set in case of a general error.

TABLE

CS3FX#

CS1FX#

A2

A1

A0

IORD# = 0

IOWR# = 0

1

0

0

0

0

RD Data

WR Data

1

0

0

0

1

Error Register

Features

1

0

0

1

0

Sector Count

Sector Count

1

0

0

1

1

Sector No.

Sector No.

1

0

1

0

0

Cylinder Low

Cylinder Low

1

0

1

0

1

Cylinder High

Cylinder High

1

0

1

1

0

Select Card/Head

Select Card/Head

1

0

1

1

1

Status

Command

0

1

1

1

0

Alt Status

Device Control

0

1

1

1

1

Drive Address

Reserved

T3-1.0 519

D7

D6

D5

D4

D3

D2

D1

D0

BBK

UNC

0

IDNF

0

ABRT

0

AMNF