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Section 9 Exception Handling
Rev. 4.00 Sep. 14, 2005 Page 212 of 982
REJ09B0023-0400
•
Example 3: Repeat loop consisting of two instructions
LDRS
R 6
; [A]
LDRS
R 4
; [A]
SETRCT
#4
;
[A]
RptDtct: RptDtct
; [B] A repeat detection instruction is an
instruction
prior
to
a
repeat
start
instruction
RptStart:
RptDtct1
; [C1][Repeat start instruction]
RptEnd: RptDtct3
; [C2][Repeat end instruction]
InstrNext
;
[A]
•
Example 4: Repeat loop consisting of one instruction
LDRS
R 8
; [A]
LDRS
R 4
; [A]
SETRCT
#4
;
[A]
RptDtct: RptDtct
; [B] A repeat detection instruction is an
instruction
prior
to
a
repeat
start
instruction
RptStart:
RptEnd: RptDtct1
; [C1][Repeat start instruction]== [Repeat end
instruction]
InstrNext
;
[A]
SPC Saved by an Exception in Repeat Control Period: If an exception is accepted in the repeat
control period while the repeat counter (RC11 to RC0) in the SR register is two or greater, the
program counter to be saved may not indicate the value to be returned correctly. To execute the
repeat control after returning from an exception processing, the return address must indicate an
instruction prior to a repeat detection instruction. Accordingly, if an exception is accepted in
repeat control period, an exception other than re-execution type exception by a repeat detection
instruction cannot return to the repeat control correctly.
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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Page 1036: ...SH7641 Hardware Manual...