SH7280 Datasheet, PDF (419/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 10 Direct Memory Access Controller (DMAC)
10.3.1 DMA Source Address Registers (SAR)
The DMA source address registers (SAR) are 32-bit readable/writable 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 single address mode,
SAR is ignored.
To transfer data of 16-bit or 32-bit width, specify the address with 16-bit or 32-bit address
boundary respectively. To transfer data in units of 16 bytes, set a value at a 16-byte boundary.
SAR is initialized to H'00000000 by a reset and retains the value in software standby mode and
module standby mode.
Bit:
Initial value:
R/W:
31
-
0
R/W
30
-
0
R/W
29
-
0
R/W
28
-
0
R/W
27
-
0
R/W
26
-
0
R/W
25
-
0
R/W
24
-
0
R/W
23
-
0
R/W
22
-
0
R/W
21
-
0
R/W
20
-
0
R/W
19
-
0
R/W
18
-
0
R/W
17
-
0
R/W
16
-
0
R/W
Bit:
Initial value:
R/W:
15
-
0
R/W
14
-
0
R/W
13
-
0
R/W
12
-
0
R/W
11
-
0
R/W
10
-
0
R/W
9
-
0
R/W
8
-
0
R/W
7
-
0
R/W
6
-
0
R/W
5
-
0
R/W
4
-
0
R/W
3
-
0
R/W
2
-
0
R/W
1
-
0
R/W
0
-
0
R/W
Rev. 1.00 Jun. 26, 2008 Page 389 of 1692
REJ09B0393-0100