11.7 Register Description

In the following register descriptions, unused write bit should be treated as “don't care”, and unused read bits should be read as zeros.

11.7.1 Data Register

- CS0

DA2-DA0 : 0

Read / Write

There are seven commands which execute data transfer from/to this register of the sector buffer for Read and Write operations. The sector table during Format command and the data associated with the Identify Device command shall also be transferred to this register.

11.7.1.1 Read/Write command

The register provides a high speed 16 bit path into the sector buffer with PIO and DMA.

11.7.1.2 Read/Write Buffer command

This command provides 16 bit path between host and data buffer in the drive.

11.7.1.3 Format command

This command provides a path for the parameter including interleave table in a sector length.

11.7.1.4 Identify Device command

Drive information is transferred during the execution of this command.

11.7.1.5 Security commands

Password information is transferred during the execution of following four commands.

1)Disable password

2)Erase Unit

3)Set Password

4)Unlock

Data in the register and on the media correspond to each other as follows:

transfer

1

A15 - A8

A7 - A0

 

 

 

 

 

D2

D1

 

 

 

 

 

transfer

2

D4

D3

 

 

 

 

 

:

 

:

 

:

 

 

 

 

 

:

 

:

 

:

 

 

 

 

 

transfer 256

D512

D511

 

D1

D2 --- D512

E1 --- E4

 

transfer 257

 

 

E1

 

 

 

 

 

:

 

 

 

E2

 

 

 

 

 

:

 

 

 

:

 

 

 

 

 

transfer 260

DATA REGISTER

 

E4

 

DATA FLOW ON THE MEDIA

 

 

 

 

 

Toshiba Corporation Digital Media Network Company

Page 50 of 153

© 2003, Copyright TOSHIBA Corporation All Rights Reserved