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ATA Flash Disk Controller

Silicon Storage Technology 

ATA Flash Disk Controller

SST55LD019A / SST55LD019B / SST55LD019C

10.0 I/O TRANSFER FUNCTION

Data Sheet

The default operation for the ATA Flash Disk Controller is 16-bit. However, if the host issues a Set-Feature com-

mand to enable 8-bit mode, the ATA Flash Disk Controller permits 8-bit data access.

The following table defines the function of various operations.

TABLE 10-1: I/O Function

Function Code

Invalid Mode

Standby Mode

Task File Write

Task File Read

Data Register Write

Data Register Read

Control Register Write

Alt Status Read

Drive Address

CS3FX#

VIL

VIH

VIH

VIH

VIH

VIH

VIL

VIL

VIL

CS1FX#

VIL

VIH

VIL

VIL

VIL

VIL

VIH

VIH

VIH

A0-A2

X

X

1-7H

1-7H

0

0

6H

6H

7H

IORD#

X

X

VIH

VIL

VIH

VIL

VIH

VIL

VIL

IOWR#

X

X

VIL

VIH

VIL

VIH

VIL

VIH

VIH

D15-D8

Undefined

High Z

X

High Z

In1

Out1

X

High Z

High Z

1. If 8-bit data transfer mode is enabled.

In 8-bit data transfer mode, High Byte is undefined for Data Out. For Data In, X can be VIH or VIL, but no other value.

D7-D0

Undefined

High Z

Data In

Data Out

In

Out

Control In

Status Out

Data Out

T10-1.0 1241

©2006 Silicon Storage Technology, Inc.

19

S71241-04-000

12/06

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