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Section 3 DSP Operation
Rev. 4.00 Sep. 14, 2005 Page 135 of 982
REJ09B0023-0400
ALU
R8 [Is]
R4 [As]
R5 [As]
R2 [As]
R3 [As]
–2/–4 (DEC)
+2/+4 (INC)
+0 (No update)
Four address operation types:
1. Not update
2. Add-index-register (Is)
3. Increment
4. Decrement
Post-update
Pre-update
Figure 3.20 DSP Addressing Instructions for MOVS
Modulo Addressing: This LSI provides modulo addressing mode, which is common in DSPs. In
modulo addressing mode, the address register is updated as explained above. When the address
pointer reaches the pre-defined address (modulo-end address), it goes to the modulo start address.
Modulo addressing is available for X and Y data transfer instructions (MOVX and MOVY), but
not for the single-data transfer instruction (MOVS). DMX and DMY in SR are used for the
modulo addressing control. If DMX is 1, the modulo addressing mode is effective for the X
memory address pointer Ax (R4 or R5). If the DMY is 1, it is effective for the Y memory address
pointer Ay (R6 or R7). Modulo addressing is available for one of X and Y address registers at one
time. A DMX = DMY = 1 case is reserved for future expansion. When both DMX and DMY are
set simultaneously, the hardware will preliminary assume that the modulo addressing mode is
effective for the Y address pointer only.
To specify the start and end addresses of the modulo address area, the MOD register, which
includes MS (modulo start) and ME (modulo end) is prepared. The following example shows a
way to set the MOD (MS and ME) register.
MOV.L ModAddr,Rn;
Rn=ModEnd, ModStart
LDC Rn,MOD;
ME=ModEnd, MS=ModStart
ModAddr:
.DATA.W
mEnd;
Lower 16 bits of ModEnd
.DATA.W
mStart;
Lower 16 bits of ModStart
ModStart: .DATA
:
ModEnd: .DATA
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...
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