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Section 3 DSP Operation
Rev. 4.00 Sep. 14, 2005 Page 124 of 982
REJ09B0023-0400
3.2 DSP
Addressing
3.2.1 DSP
Repeat
Control
This LSI prepares a special control mechanism for efficient repeat loop control. An instruction
SETRC sets the repeat times into the repeat counter RC (12 bits), and an execution mode in which
a program loop executes repetitively until RC is equal to 1. After completion of the repeat
instructions, the RC value becomes 0.
Repeat start address register RS keeps the start address of a repeat loop. Repeat end register RE
keeps the repeat end address. (There are some exceptions. See note, Actual Implementation
Options.) Repeat counter RC keeps the number of repeat times. In order to perform loop control,
the following steps are required.
Step 1) Set loop start address into RS
Step 2) Set loop end address into RE
Step 3) Set repeat counter into RC
Step 4) Start repeat control
To do steps 1 and 2, use the following instructions:
LDRS @(disp,PC)
LDRE @(disp,PC)
For steps 3 and 4, use the SETRC instruction. An operand of SETRC is an immediate value or one
of the general-purpose registers that will specify the repeat times.
SETRC #imm;
#imm->RC, enable repeat control
SETRC Rm;
Rm->RC, enable repeat control
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 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...
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