Hitachi HDS723020BLA642 - Download Microcode (92 H); Table 72 Download Microcode Command (92 H)

Hitachi hard disk drive specifications
118
11.4 Download Microcode (92h)
Command Block Output Registers
Command Block Input Registers
Register
7
6
5
4
3
2
1
0
Register
7
6
5
4
3
2
1
0
Data
-
-
-
-
-
-
-
-
Data
-
-
-
-
-
-
-
-
Feature
SUBCOMMAND(00-07)
Error
...See Below...
Sector Count
SECTOR_COUNT(00-07)
Sector Count
-
-
-
-
-
-
-
-
Sector Number
SECTOR_COUNT(08-15)
Sector Number
-
-
-
-
-
-
-
-
Cylinder Low
BUFFER_OFFSET(00-07)
Cylinder Low
-
-
-
-
-
-
-
-
Cylinder High
BUFFER_OFFSET(08-15)
Cylinder High
-
-
-
-
-
-
-
-
Device/Head
-
-
-
D
-
-
-
-
Device/Head
-
-
-
-
-
-
-
-
Command
1
0
0
1
0
0
1
0
Status
...See Below...
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC
UNC
0
IDN
0
ABT
T0N
AMN
BSY
RDY
DF
DSC
DRQ
COR
IDX
ERR
0
V
0
0
0
V
0
0
0
1
0
1
0
0
-
V
Table 72 Download Microcode Command (92h)
Output Parameters To The Device
Feature
Subcommand code.
03h : Download and save microcode with offsets.
07h : Download and save microcode.
Other values are reserved.
Sector Count
Lower byte of 16-bit sector count value to transfer from the host.
Sector Number
Higher byte of 16-bit sector count value to transfer from the host.
Cylinder
Buffer offset (only used for Feature = 03h)
This command enables the host to alter the device's microcode. The data transferred using the DOWNLOAD
MICROCODE commands is vendor specific.
All transfers shall be an integer multiple of the sector size. The size of the data transfer is determined by the
contents of the Sector Number and Sector Count registers. The Sector Number register is used to extend the
Sector Count register to create a 16-bit sector count value. The Sector Number register is the most significant
eight bits and the Sector Count register is the least significant eight bits. A value of zero in both the Sector