5K320 SATA OEM Specification

When Feature register is 03h (=Set Transfer mode), the Sector Count Register specifies the transfer mechanism. The upper 5 bits define the type of transfer and the low order 3 bits encode the mode value.

 

bits

bits

 

 

(7:3)

(2:0)

 

PIO Default Transfer Mode

00000

000

 

PIO Default Transfer Mode, Disable IORDY

00000

001

 

PIO Flow Control Transfer Mode x

00001

nnn

(nnn=000,001,010,011,100)

Multiword DMA mode x

00100

nnn

(nnn=000,001,010)

Ultra DMA mode x

01000

nnn

(nnn=000,001,010,011,100,101)

When Feature register is 05h (=Enable Advanced Power Management), the Sector Count Register specifies the Advanced Power Management level.

C0h - FEh ...

The deepest Power Saving mode is Active Idle

80h

- BFh ...

The deepest Power Saving mode is Low power Idle

01h

- 7Fh ...

The deepest Power Saving mode is Standby

00h, FFh ...

Aborted

Note 2.

If the number of auto reassigned sectors reaches the device’s reassignment capacity, the write cache function will be automatically disabled. Although the device still accepts the Set Features command (with Feature register = 02h) without error, the write cache function will remain disabled. For current write cache function status, please refer to the Identify Device Information(129word) by Identify Device command. Power off must not be done in 5 seconds after write command completion when write cache is enabled.

Note 3.

When Feature register is 85h (=Disable Advanced Power Management), the deepest Power Saving mode becomes Active Idle.

Note 4.

When the Feature register is set to 10h or 90h, the value set to the Sector Count register specifies the specific Serial ATA feature to enable or disable.

When the Feature register is set to 10h or 90h, the value set to the Sector Count register specifies the specific Serial ATA feature to enable or disable.

Sector count value

Description

01h

Non-zero buffer offset in DMA setup FIS

02h

DMA setup FIS auto-activate optimization

03h

Device-initiated interface power state transitions

04h

Guaranteed in-order data delivery

06h

Software Settings Preservation

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Hitachi HTS543232L9A300, HTS543280L9SA00, HTS543225L9A300, HTS543216L9SA00, HTS543212L9A300, HTS543216L9A300 manual 138