Interface
Table 5.7 Operation of DOWNLOAD MICROCODE
Host Command
Movement of device
Subcommand
code
(FR Field)
Sector Offset
*1
(CH, CL 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
Rewriting execution reservation
03h xxxxh
xxxxh
It is.
Rewriting execution reservation
0000h Non
Execution.
*2
07h ----
xxxxh
It is.
Execution. *2
Excluding 01h,
03h
and 07h
−
Abort
*1: When FR Field = 03 (Mode3) is specified, Abort is returned as an error when
the specification of doing Sector Offset (CH, CL Field) is the transfer end the
last sector and is not consecutive.
Moreover, Sector Offset (CH, CL Field) is invalid in specification other than
FR Field = 03 (Mode3).
*2: In the following cases, Subcommand code = 07h returns Abort as an error
though becomes Microcode rewriting execution specification.
1) Abnormality of the transmitted Microcode data is detected.
2) The data transfer is not done (The number of transfer: 0).
3) The DOWNLOAD MICROCODE command is not continuously issued when
the transfer has been divided into multiple transfers.
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