TC1796
System Units (Vol. 1 of 2)
On-Chip Debug Support
User’s Manual 17-11 V2.0, 2007-07
OCDS, V2.0
17.3.3 Concurrent Debugging
A limited concurrent debugging is possible for CPU and DMA.
It is not possible to trace CPU and DMA at the same time. But when the trace port is
assigned to the DMA Controller, the break-in and break-out features of the CPU can be
used at the same time. Selecting DMA trace and enabling the break-out lines of both
units, makes it possible to distinguish between DMA trace events and CPU break-out
activation:
• during DMA trace, the BRKOUT output becomes activated only together with one of
the trace port pins being active (‘1’) as well.
• if BRKOUT
output becomes activated with all trace pins being zero, this means that
the CPU has activated its break-out signal.
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