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Section 11 User Break Controller (UBC)
Rev. 4.00 Sep. 14, 2005 Page 267 of 982
REJ09B0023-0400
4. When a user break and another exception occur at the same instruction, which has higher
priority is determined according to the priority levels defined in table 9.1 in section 9,
Exception Handling. If an exception with higher priority occurs, the user break is not
generated.
Pre-execution break has the highest priority.
When a post-execution break or data access break occurs simultaneously with a re-
execution-type exception (including pre-execution break) that has higher priority, the re-
execution-type exception is accepted, and the condition match flag is not set (see the
exception in the following note). The break will occur and the condition match flag will be
set only after the exception source of the re-execution-type exception has been cleared by
the exception handling routine and re-execution of the same instruction has ended.
When a post-execution break or data access break occurs simultaneously with a
completion-type exception (TRAPA) that has higher priority, though a break does not
occur, the condition match flag is set.
5. Note the following exception for the above note.
If a post-execution break or data access break is satisfied by an instruction that generates a
CPU address error by data access, the CPU address error is given priority to the break. Note
that the UBC condition match flag is set in this case.
6. Note the following when a break occurs in a delay slot.
If a pre-execution break is set at the delay slot instruction of the RTE instruction, the break
does not occur until the branch destination of the RTE instruction.
7. User breaks are disabled during USB module standby mode. Do not read from or write to the
UBC registers during USB module standby mode; the values are not guaranteed.
8. When the repeat loop of the DSP extended function is used, even though a break condition is
satisfied during execution of the entire repeat loop or several instructions in the repeat loop, the
break may be held. For details, see section 9, Exception Handling.
Summary of Contents for HD6417641
Page 2: ...Rev 4 00 Sep 14 2005 Page ii of l...
Page 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Page 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
Page 12: ...Rev 4 00 Sep 14 2005 Page xii of l...
Page 28: ...Rev 4 00 Sep 14 2005 Page xxviii of l...
Page 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Page 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Page 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Page 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Page 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Page 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Page 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Page 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Page 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Page 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Page 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Page 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Page 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Page 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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