13.41 Write Buffer (E8h). Hitachi IC25N080ATMR04, IC25N040ATMR04-0 - Travelstar 40GB Laptop Hard Drive 9.5mm 2.5 Inch Notebook HDD, IC25N080ATMR04-0 - 3E034 - Dell 80GB Laptop Hard Drive, Travelstar 80GN, IC25N020ATMR04, 08K0910, IC25N040ATMR04, IC25N060ATMR04, IC25N030ATMR04

13.41 Write Buffer (E8h)

Table 124: Write Buffer (E8h)

Command Block Output Registers

Register

Data

Feature

Sector Count

LBA Low

LBA Mid

LBA High

Device

Command

7 6 5 4 3 2 1 0

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

1 - 1 D - - - -

1 1 1 0 1 0 0 0

Error Register

7 6 5 4 3 2 1 0

CRC UNC 0 IDN 0 ABT T0N AMN

0 0 0 0 0 V 0 0

Command Block Input Registers

Register

Data

Error

Sector Count

LBA Low

LBA Mid

LBA High

Device

Status

7 6 5 4 3 2 1 0

- - - - - - - see below

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - -

- - - - - - - see below

Status Register

7 6 5 4 3 2 1 0

BSY RDY DF DSC DRQ COR IDX ERR

0 V 0 0 V

The Write Buffer command transfers a sector of data from the host to the sector buffer of the device. The sectors of data are transferred through the Data Register 16 bits at a time.

The Read Buffer and Write Buffer commands are synchronized such that sequential Write Buffer and Read Buffer commands access the same 512 byte within the buffer.

Travelstar 80GN Hard Disk Drive Specification

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