Write Buffer (E8H); Table 135: Write Buffer (E8H) - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

13.42 Write Buffer (E8h)

Table 135: Write Buffer (E8h)

Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
7 6 5
CRC UNC 0
0 0 0
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.
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - D - - - -
1 1 1 0 1 0 0 0
Error Register
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
Travelstar 4K120 Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
0 7 6
BSY RDY DF DSC DRQ
0 0 V
190
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
5 4 3 2
COR IDX
0 - - 0
1 0
ERR
- V