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5.3 Host Commands
C141-E221 5-31
(9) DOWNLOAD MICROCODE (X’92’)
At command issuance (I/O registers setting contents)
1F7
h
(CM) 1 0 0 1 0 0 1 0
1F6
h
(DH) 1 X 1 DV 0 0 0 0
1F5
h
(CH) 00
1F4
h
(CL) 00
1F3
h
(SN) Sector count (15-8)
1F2
h
(SC) Sector count (7-0)
1F1
h
(FR) Subcommand code
At command completion (I/O registers contents to be read)
1F7
h
(ST) Status information
1F6
h
(DH) 1 X 1 DV 0 0 0 0
1F5
h
(CH) 00
1F4
h
(CL) 00
1F3
h
(SN) XX
1F2
h
(SC) XX
1F1
h
(ER) Error information
This command rewrites the microcode of the device (firmware).
When this command is accepted, the device does beginning the data transfer of
the microcode or the microcode rewriting according to Subcommand code
(Rewriting is also possible simultaneously with the data transfer). Refer to
Table 5-5.
In the data transfer of Subcommand code:01h, transfer by which data is divided
into multiple times is possible. Refer to Table 5-6.
After the designation of rewriting by Subcommand code:07h, reactivates in the
device for the update of the rewriting microcode of the microcode.