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5.3 Host Commands
C141-E224 5-45
(9) DOWNLOAD MICROCODE (X’92’)
At command issuance (Shadow Block Registers setting contents)
CM 1 0 0 1 0 0 1 0
DH 1 x 1 x 0 0 0 0
CH 00
CL 00
SN Sector count (15-8)
SC Sector count (7-0)
FR Subcommand code
At command completion (Shadow Block Registers contents to be read)
ST Status information
DH 1 x 1 x 0 0 0 0
CH 00
CL 00
SN xx
SC xx
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 5.8.
In the data transfer of Subcommand code:01h, transfer by which data is divided
into multiple times is possible. Refer to Table 5.9.
After the designation of rewriting by Subcommand code:07h, reactivates in the
device for the update of the rewriting microcode of the microcode.
Table 5.8 Operation of DOWNLOAD MICROCODE
Host Command Movement of device
Subcommand code
(FR Field)
Sector count
(SN, SC Field)
Data transfer Microcode rewriting execution
0000h Non Rewriting execution reservation
01h
xxxxh It is. Rewriting execution reservation
0000h Non Execution. **
07h
xxxxh It is. Execution. **
Excluding 01h and 07h
−
Abort