Renesas SH7781 用户手册
14. Direct Memory Access Controller (DMAC)
Rev.1.00 Jan. 10, 2008 Page 677 of 1658
REJ09B0261-0100
14.3.3
DMA Destination Address Registers 0 to 11 (DAR0 to DAR11)
DAR are 32-bit readable/writable registers that specify the destination address of a DMA transfer.
During a DMA transfer, these registers indicate the destination address of the next transfer.
During a DMA transfer, these registers indicate the destination address of the next transfer.
A word or longword boundary address should be specified when a word or longword transfer is
performed respectively. A 16-byte or 32-byte boundary value should be specified when a 16-byte
or 32-byte transfer is performed respectively.
performed respectively. A 16-byte or 32-byte boundary value should be specified when a 16-byte
or 32-byte transfer is performed respectively.
In 29-bit address mode, the source address is changed as follows before it is output.
• The upper three bits are output as 000 when bits 31 to 29 are not 111 and areas 0 to 6 are used.
• The upper three bits are output as 111 when bits 31 to 29 are not 111 and area 7 is used.
• The written address is output as it is when bits 31 to 29 are 111.
• The upper three bits are output as 111 when bits 31 to 29 are not 111 and area 7 is used.
• The written address is output as it is when bits 31 to 29 are 111.
In 32-bit address mode, the written address is output as it is.
The initial value of DAR is undefined.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
31
30
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⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIt:
Initial value:
R/W:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
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⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIt:
Initial value:
R/W: