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HD6432351 bảng dữ liệu(PDF) 236 Page - Renesas Technology Corp

tên linh kiện HD6432351
Giải thích chi tiết về linh kiện  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
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HD6432351 bảng dữ liệu(HTML) 236 Page - Renesas Technology Corp

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Section 7 DMA Controller (DMAC)
Rev. 3.00 Sep 15, 2006 page 202 of 988
REJ09B0330-0300
7.2.1
Memory Address Registers (MAR)
16
*
R/W
18
*
R/W
17
*
R/W
Bit
MAR
Initial value
R/W
:
:
:
:
19
*
R/W
21
*
R/W
22
*
R/W
23
*
R/W
24
—
0
—
25
—
0
—
26
—
0
—
27
—
0
—
28
—
0
—
29
—
0
—
30
—
0
—
31
—
0
—
0
*
R/W
2
*
R/W
1
*
R/W
3
*
R/W
4
*
R/W
5
*
R/W
6
*
R/W
7
*
R/W
8
*
R/W
9
*
R/W
10
*
R/W
11
*
R/W
12
*
R/W
13
*
R/W
14
*
R/W
15
*
R/W
20
*
R/W
*: Undefined
Bit
MAR
Initial value
R/W
:
:
:
:
MAR is a 32-bit readable/writable register that specifies the transfer source address or destination
address.
The upper 8 bits of MAR are reserved: they are always read as 0, and cannot be modified.
Whether MAR functions as the source address register or as the destination address register can be
selected by means of the DTDIR bit in DMACR.
MAR is incremented or decremented each time a byte or word transfer is executed, so that the
address specified by MAR is constantly updated. For details, see section 7.2.4, DMA Control
Register (DMACR).
MAR is not initialized by a reset or in standby mode.



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