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Section 3 DSP Operation
Rev. 4.00 Sep. 14, 2005 Page 134 of 982
REJ09B0023-0400
Three address operation types:
1. Not update
2. Add-index-register (Ix/Iy)
3. Increment
All operations are post-update type.
To decrement an address pointer, set –2 in an index register.
ALU
R8 [Ix]
R4 [Ax]
R5 [Ax]
+2 (INC)
+0 (Not update)
AU
R9 [Iy]
R6 [Ay]
R7 [Ay]
+2 (INC)
+0 (Not update)
Additional
adder for DSP
addressing
Figure 3.19 DSP Addressing Instructions for MOVX.W and MOVY.W
Addressing in X and Y data transfer operation is always word mode; that is access to X and Y data
memories are 16-bit data width. Therefore, the increment operation adds 2 to an address register.
To realize decrement, set –2 in an index register and use add-index-register operation.
Addressing for MOVS: This LSI has single-data transfer instructions (MOVS.W and MOVS.L)
to load/store DSP data registers. In these instructions, R2 to R5 (As: Address register for single-
data transfer) are used for the address pointer.
There are four data addressing types for single-data transfer operation.
1. Not-update address register
2. Add-index register (post-update)
3. Increment address register (post-update)
4. Decrement address register (pre-update)
The address pointer set As has an index register R8[Is] (figure 3.20)
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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