Diagnostics and Recovery
7-31Emulation Features
7.10 Diagnostics and Recovery
Debug registers within the CPU keep track of the state of several key signals.
This allows diagnosis of such problems as a floating READY signal, NMI sig-
nal, or RS (reset) signal. Should the debug software attempt an operation that
does not complete after a certain time-out period (as determined by the debug
software), it attempts to determine the probable cause and display the situa-
tion to you. You can then abort, correct the situation or allow it to correct itself,
or chose to override it.
Such situations include:
- RS being asserted
- A ready signal not being asserted for a memory access
- NMI being asserted
- The absence of a functional clock
- The occurrence of a JTAG test-logic-reset
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