In LBA mode the sectors on the device are assumed to be linearly mapped with an initial definition of: LBA

0 = (Cylinder 0, head 0, and sector 1). Irrespective of translate mode geometry set by the host, the LBA address of a given sector does not change:

6.3.2I/O Register - Address

The communication to or from drive is through the SATA interface. To the host system the SATA drive emulates a parallel ATA drive. As such, the following registers are not accessed directly host to drive. The registers are set through the Serial Interface.

The Control Block registers are used for drive control and to post-alternate status. I/O port function and its selection address are tabulated.

I/O registers

Command Block registers

When read

When written

Data

Data

Error

Features Current

 

Features Previous

Sector Count Current

Sector Count Current

Sector Count Previous

Sector Count Previous

LBA Low Current

LBA Low Current

LBA Low Previous

LBA Low Previous

LBA Mid Current

LBA Mid Current

LBA Mid Previous

LBA Mid Previous

LBA High Current

LBA High Current

LBA High Previous

LBA High Previous

Device

Device

Status

Command

Control Block registers

Alternate Status

Device Control

6.3.3Control Block Register Descriptions

6.3.3.1Alternate Status Register (ex. 3F6h)

This register contains the same information as the Status register in the Command Block register. The only difference is that reading this register does not imply interrupt acknowledgment nor does it clear a pending interrupt.

7

6

5

4

3

2

1

0

BSY

DRDY

#

#

DRQ

Obsolete

Obsolete

ERR

 

 

 

 

 

 

 

 

NOTE: See 6.3.4.10 for definitions of the bits in this register.

Spinpoint M8-DVR Disti Product Manual REV 2.0

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Samsung M8-DVR manual 2 I/O Register Address, Control Block Register Descriptions, Registers, When read When written

M8-DVR specifications

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