SST85LD0512 datasheet(53/73 Pages) SST

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Advance Information

NANDrive

SST85LD0128 / SST85LD0256 / SST85LD0512

S71319-03-000

2/07

12.2.1.35 Write-Buffer - E8H

The Write-Buffer command enables the host to overwrite contents of the NANDrive’s sector buffer with

any data pattern desired. This command has the same protocol as the Write-Sector(s) command and

transfers 512 Bytes.

12.2.1.36 Write-DMA - CAH

This command executes in a similar manner to Write-Sector(s) except for the following:

- the host initializes the DMA channel prior to issuing the command;

- data transfers are qualified by DMARQ and are performed by the DMA channel;

- the NANDrive issues only one interrupt per command to indicate that data transfer has terminated and

status is available. During the execution of a WRITE DMA command, the NANDrive will provide status

of the BSY bit or the DRQ bit until the command is completed.

12.2.1.37 Write-Long-Sector - 32H or 33H

This command is similar to the Write-Sector(s) command except that it writes 516 Bytes instead of 512

Bytes. Only single sector Write-Long-Sector operations are supported. The transfer consists of 512

Bytes of data transferred in Word-Mode followed by 4 Bytes of ECC transferred in Byte-Mode. Because

of the unique nature of the solid-state NANDrive, the 4 Bytes of ECC transferred by the host may be

Bit ->

76543210

Command (7)

E8H

C/D/H (6)

XDrive

Cyl High (5)

Cyl Low (4)

Sec Num (3)

Sec Cnt (2)

Feature (1)

Bit ->

76543210

Command (7)

CAH

C/D/H (6)

LBA

Drive

Head (LBA 27-24)

Cyl High (5)

Cylinder High (LBA 23-16)

Cyl Low (4)

Cylinder Low (LBA 15-8)

Sec Num (3)

Sector Number (LBA 7-0)

Sec Cnt (2)

Sector Count

Feature (1)

Bit ->

76543210

Command (7)

32H or 33H

C/D/H (6)

LBA

Drive

Head (LBA 27-24)

Cyl High (5)

Cylinder High (LBA 23-16)

Cyl Low (4)

Cylinder Low (LBA 15-8)

Sec Num (3)

Sector Number (LBA 7-0)

Sec Cnt (2)

Feature (1)

SST85LD0512 Datasheet(PDF) 53 Page - Silicon Storage Technology, Inc

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