Motorola MCF5282 ユーザーズマニュアル
MOTOROLA
Chapter 29. Debug Support
29-31
Background Debug Mode (BDM)
29.5.3.3.7 Resume Execution (
GO
)
The pipeline is flushed and refilled before normal instruction execution resumes.
Prefetching begins at the current address in the PC and at the current privilege level. If any
register (such as the PC or SR) is altered by a BDM command while the processor is halted,
the updated value is used when prefetching resumes. If a
Prefetching begins at the current address in the PC and at the current privilege level. If any
register (such as the PC or SR) is altered by a BDM command while the processor is halted,
the updated value is used when prefetching resumes. If a
GO
command is issued and the
CPU is not halted, the command is ignored.
Command Sequence:
Figure 29-30.
GO
Command Sequence
Operand Data:
None
Result Data:
The command-complete response (0xFFFF) is returned during the
next shift operation.
next shift operation.
29.5.3.3.8 No Operation (
NOP
)
NOP
performs no operation and may be used as a null command where required.
Command Formats:
Command Sequence:
Figure 29-32.
NOP
Command Sequence
Operand Data:
None
Result Data:
The command-complete response, 0xFFFF (with S cleared), is
returned during the next shift operation.
returned during the next shift operation.
15
12
11
8
7
4
3
0
0x0
0xC
0x0
0x0
Figure 29-29.
GO
Command Format
15
12
11
8
7
4
3
0
0x0
0x0
0x0
0x0
Figure 29-31.
NOP
Command Format
GO
???
NEXT CMD
’CMD COMPLETE’
NOP
???
NEXT CMD
’CMD COMPLETE’