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11.2.3
DMA Transfer Count Registers 0–3 (DMATCR0–DMATCR3)
DMA transfer count registers 0–3 (DMATCR0–DMATCR3) are 24-bit read/write registers that
specify the transfer count for the channel (byte count, word count, or longword count). Specifying
a H'000001 gives a transfer count of 1, while H'000000 gives the maximum setting, 16,777,216
transfers. The data for the upper 8 bits of a DMATCR is 0 when read. Always write 0. The initial
value after power-on resets or in software standby mode is undefined. These registers are not
initialized with manual reset.
Always write 0 to the upper 8 bits of a DMATCR.
Bit:
31
30
29
28
27
26
25
24
—
—
—
—
—
—
—
—
Initial value:
—
—
—
—
—
—
—
—
R/W:
R
R
R
R
R
R
R
R
Bit:
23
22
21
20
19
18
17
16
Initial value:
—
—
—
—
—
—
—
—
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit:
15
14
13
12
11
10
9
8
Initial value:
—
—
—
—
—
—
—
—
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit:
7
6
5
4
3
2
1
0
Initial value:
—
—
—
—
—
—
—
—
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Содержание SH7041 Series
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