ATA COMMAND BLOCK AND SET DESCRIPTION

SSD-PXXX(I)-3521 DATA SHEET

Read Buffer — E4h

The Read Buffer command allows the host to read the contents of the sector buffer. When issued, the device sets the BSY bit and sets up the sector buffer data in preparation for the read operation. When the data is ready, the DRQ bit is set and the BSY bit in the Status register are set and cleared, respectively.

Table 57: Read Buffer — E4h

Register

D7

D6

D5

D4

 

D3

D2

 

D1

D0

Feature

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sector Count

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sector Number

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cylinder Low

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cylinder High

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drive Head

X

X

X

Drive

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

Command

 

 

 

E4h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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All unauthorized use and/or reproduction is prohibited.

3521P-02DSR

PAGE 72

FEBRUARY 2, 2009

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Silicon Image SSD-P08G(I)-3521 manual Read Buffer E4h