User`s guide

134 MPC8240 and MPC8260 Emulation
Chapter 10: Troubleshooting the Emulator
Problems with the Target System
Continue with more tests:
4
Enter the break command:
U>b
M>
If you can get to the "M>" prompt, continue with more tests:
5
At the "M>" prompt , check register and memory access:
M>reg r0=12345678
M>reg r0
reg r0=12345678
M>
If the returned value is equal to the written value, then the VDD level of
If the prompt after b is "M>"
with error messages
If you see: "!ERROR 145! Unable to soft stop
- freezing the processor clocks" the
processor is hard stopped. Check the mask
revision, processor type, and firmware
version. If all of these look good, the target
may not be terminating cycles (pending
external bus cycles). Successive run ("r")
and step ("s") commands will fail. The
processor may have fetched an invalid
instruction.
Check the value of the PC (IAR):
M>reg PC
reg PC= xxxxxxxx
M>
If the value is fff00100, the processor had a
problem accessing the boot ROM and
crashed during boot.
Processor and/or board level reset is
required to recover from "freezing
processor clocks" -- register and memory
commands should still work.
If the prompt after b is "M>"
with no error messages
Everything is still working correctly.