HP C2246 Technical Reference Manual page 129

Execute Data
Execute Data
The EXECUTE DATA command allows the Initiator to instruct the Target to execute special
firmware utilities, thus providing functions not available in the standard command set. This
command causes parameter bytes, sent by the Initiator to the data buffer via a WRITE
BUFFER command, to be used by those firmware utilities.
Caution
Byte
00
01
02
03
04-08
09
The EXECUTE DATA command allows the Initiator to execute code
that may cause damaging results. It should only be performed when no
data retention is required. Use of this command should be restricted to
development or other highly controlled environments. Execution of these
firmware utilities with parameters not approved by Hewlett-Packard may be
deemed a violation of warranty.
EXECUTE DATA Command Descriptor Block (COB)
Bit
7
I
6
I
5 4 3
I
2
I
1
I
0
Opcode= FEH
Logical Unit Number
0
0
I
RST
I
0
I
EXE
0
I
0
I
0 0 0
I
Page
0
I
0
I
0 0
Jump Entry
Reserved
Control Byte
RST (Restart). This bit instructs the target to re-execute the firmware utility where it
stopped due to a reported error condition, Data In phase, etc. Note: If RST is set on a
firmware utility that doesn't support it, the command will fail with:
Status: CHECK CONDITION
Sense Key: ILLEGAL REQUEST
Additional Sense Code: ILLEGAL FIELD IN CDB
EXE (Execute). This bit instructs the Target to execute the firmware utility at the specified
Page and Jump Entry locations. A WRITE BUFFER command which includes any required
firmware utility parameters should precede the EXECUTE DATA command.
Page (ROM Page). This field indicates the location in ROM of the firmware utility. The
currently supported Page values are 06H and 07H.
If the specified Page value is not supported, the command will fail with:
Status: CHECK CONDITION
Sense Key: ILLEGAL REQUEST
Additional Sense Code: ILLEGAL FIELD IN CDB
Jump Entry. This field indicates the specific firmware utility on the selected
Page
to execute
or re-start. The currently supported
Jump Entry
values are 0 to 15 (0000 to 1111).
Vendor Unique Command Descriptions B·9