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Section 13 Direct Memory Access Controller (DMAC)
Rev. 4.00 Sep. 14, 2005 Page 409 of 982
REJ09B0023-0400
13.3.1
DMA Source Address Registers (SAR)
DMA source address registers (SAR) are 32-bit read/write registers that specify the source address
of a DMA transfer. During a DMA transfer, these registers indicate the next source address. When
the data of an external device with
DACK
is transferred in the single address mode, the SAR is
ignored.
To transfer data in 16 bits or in 32 bits, specify the address with 16-bit or 32-bit address boundary.
When transferring data in 16-byte units, a 16-byte boundary (address 16n) must be set for the
source address value. The SAR is undefined at reset and retains the current value in standby or
module standby mode.
13.3.2
DMA Destination Address Registers (DAR)
DMA destination address registers (DAR) are 32-bit read/write registers that specify the
destination address of a DMA transfer. These registers include count functions, and during a DMA
transfer, these registers indicate the next destination address. When the data of an external device
with
DACK
is transferred in the single address mode, the DAR is ignored.
To transfer data in 16 bits or in 32 bits, specify the address with 16-bit or 32-bit address boundary.
When transferring data in 16-byte units, a 16-byte boundary (address 16n) must be set for the
source address value. The DAR is undefined at reset and retains the current value in standby or
module standby mode.
13.3.3
DMA Transfer Count Registers (DMATCR)
DMA transfer count registers (DMATCR) are 32-bit read/write registers that specify the DMA
transfer count (bytes, words, or longwords). The number of transfers is 1 when the setting is
H'000001, 16777215 when H'00FFFFFF is set, and 16777216 (the maximum) when H'000000 is
set. During a DMA transfer, these registers indicate the remaining transfer count.
The upper eight bits of DMATCR will return 0 if read, and should only be written with 0. To
transfer data in 16 bytes, one 16-byte transfer (128 bits) counts one. The DMATCR is undefined at
reset and retains the current value in standby or module standby mode.
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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