mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 197

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

5.5.3.3.9 Synchronize PC to the PSTDDATA Lines (
The
After the debug module receives the command, it sends a signal to the ColdFire processor
that the current PC must be displayed. The processor then forces an instruction fetch at the
next PC with the address being captured in the DDATA logic under control of CSR[BTB].
The specific sequence of PSTDDATA values is as follows:
The
monitoring. The execution of this command is considerably less obtrusive to the real-time
operation of an application than a
Command Formats:
Command Sequence:
Operand Data:
Result Data:
15
1. Debug signals a
2. CPU completes the current instruction.
3. CPU forces an instruction fetch to the next PC, generates a PST = 0x5 value
4. The instruction address corresponding to the PC is captured.
5. The PST marker (0x9–0xB) is generated and displayed as defined by CSR[BTB]
SYNC
SYNC
indicating a taken branch and signals the capture of DDATA.
followed by the captured PC address.
_
0x0
_
PC
PC
command captures the current PC and displays it on the PSTDDATA outputs.
command can be used to dynamically access the PC for performance
12
Figure 5-37.
None
Command complete status (0xFFFF) is returned when the register
write is complete.
SYNC
Figure 5-36.
11
_
PC
SYNC_PC
0x0
Chapter 5. Debug Support
command is pending.
NOP
HALT
???
SYNC
SYNC
-
CPU
_
8
PC
_
PC
/
READ
Command Sequence
Command Format
"CMD COMPLETE"
7
NEXT CMD
-
PC
/
RESUME
0x0
Background Debug Mode (BDM)
SYNC
command sequence.
4
_
PC
3
)
0x1
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0