Silicon Image SSD-D32G(I)-4300 manual Read Sector - 20h, 21h, Register

Models: SSD-D32G(I)-4300

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Read Sector — 20h, 21h

ATA COMMAND BLOCK AND SET DESCRIPTION

SSD-DXXX(I)-4300 DATA SHEET

Read Sector — 20h, 21h

The Read Sector command allows the host to read sectors 1 to 256 as specified in the Sector Count register. If the sector count is set to 0h, all 256 sectors of data are made available. When the command code is issued and the first sector of data has been transferred to the buffer, the DRQ bit is set. The Read Sector command is terminated by writing the cylinder, head, and sector number of the last sector read in the task file. On error, the read operation is aborted in the errant sector.

Table 41: Read Sector — 20h, 21h

Register

D7

D6

D5

D4

 

D3

D2

D1

D0

Feature

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

Sector Count

 

 

 

Sector Count

 

 

 

 

 

 

 

 

 

Sector Number

 

 

Sector Number (LBA7-0)

 

 

 

 

 

 

 

 

Cylinder Low

 

 

Cylinder Low (LBA15-8)

 

 

 

 

 

 

 

 

Cylinder High

 

 

Cylinder High (LBA23-16)

 

 

 

 

 

 

 

 

 

Drive Head

1

LBA

1

Drive

 

Head Number (LBA27-24)

 

 

 

 

 

 

 

 

 

Command

 

 

 

20h or 21h

 

 

 

 

 

 

 

 

 

 

 

 

 

SILICONSYSTEMS PROPRIETARY

This document and the information contained within it is confidential and proprietary to SiliconSystems, Inc.

All unauthorized use and/or reproduction is prohibited.

4300D-00DSR

PAGE 56

FEBRUARY 27, 2009

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Silicon Image SSD-D32G(I)-4300 manual Read Sector - 20h, 21h, Register