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Section 3 DSP Operation
Rev. 4.00 Sep. 14, 2005 Page 128 of 982
REJ09B0023-0400
Start(End):
instr – 1
instr0
instr1
instr2
; A
; B
; C
; A
1. 1 repeated step
A: Acceptable for any interrupts
B and C: Acceptable for some interrupts
RC = 0 :
Acceptable for any interrupts
RC > 1 :
_
2. 2 repeated steps
4. 4 repeated steps
5. 5 or more repeated steps
3. 3 repeated steps
Start:
End:
instr – 1
instr0
instr1
instr2
instr3
instr4
instr4
; A
; A
; B
; C
; C
; C
; A
Start:
End:
instr – 1
instr0
instr1
:
:
instr n – 3
instr n – 2
instr n – 1
instr n
instr n + 1
; A
; A
; A
; B
; C
; C
; C
; A
Start:
End:
instr – 1
instr0
instr1
instr2
instr3
; A
; B
; C
; C
; A
Start:
End:
instr – 1
instr0
instr1
instr2
instr3
instr4
; A
; B
; C
; C
; C
; A
Figure 3.18 Restriction of Interrupt Acceptance in Repeat Loop
Note 1: Actual Implementation
Repeat start and repeat end registers, RS and RE, specify the repeat start instruction and repeat end
instruction. The actual addresses that are kept in these registers depend on the number of
instructions in the repeat loop. The rule is as follows:
Repeat_Start:
An address of the instruction at the repeat top
Repeat_Start0:
An address of the instruction before one instruction at the repeat top
Repeat_End3:
An address of the instruction before three instructions at the repeat bottom
Table 3.17 RS and RE Setting Rule
Number of Instructions in Repeat Loop
1 2 3
≥
4
RS Repeat_start0
+
8 Repeat_start0
+ 6
Repeat_ 4
Repeat_start
RE
Repeat_ 4
Repeat_ 4
Repeat_ 4
Repea 4
Содержание HD6417641
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Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
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Страница 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Страница 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
Страница 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Страница 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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Страница 1036: ...SH7641 Hardware Manual...