Section 7 DMA Controller (DMAC)
Rev. 3.00 Mar. 14, 2006 Page 141 of 804
REJ09B0104-0300
7.2.5
DMA Block Size Register (DBSR)
DBSR specifies the repeat size or block size. DBSR is enabled in repeat transfer mode and block
transfer mode and is disabled in normal transfer mode.
31
BKSZH31
0
R/W
30
BKSZH30
0
R/W
29
BKSZH29
0
R/W
28
BKSZH28
0
R/W
27
BKSZH27
0
R/W
24
BKSZH24
0
R/W
26
BKSZH26
0
R/W
25
BKSZH25
0
R/W
Bit
Bit Name
Initial Value
R/W
23
BKSZH23
0
R/W
22
BKSZH22
0
R/W
21
BKSZH21
0
R/W
20
BKSZH20
0
R/W
19
BKSZH19
0
R/W
16
BKSZH16
0
R/W
18
BKSZH18
0
R/W
17
BKSZH17
0
R/W
Bit
Bit Name
Initial Value
R/W
15
BKSZ15
0
R/W
14
BKSZ14
0
R/W
13
BKSZ13
0
R/W
12
BKSZ12
0
R/W
11
BKSZ11
0
R/W
8
BKSZ8
0
R/W
10
BKSZ10
0
R/W
9
BKSZ9
0
R/W
Bit
Bit Name
Initial Value
R/W
7
BKSZ7
0
R/W
6
BKSZ6
0
R/W
5
BKSZ5
0
R/W
4
BKSZ4
0
R/W
3
BKSZ3
0
R/W
0
BKSZ0
0
R/W
2
BKSZ2
0
R/W
1
BKSZ1
0
R/W
Bit
Bit Name
Initial Value
R/W
Bit Bit
Name
Initial
Value R/W
Description
31 to 16 BKSZH31 to
BKSZH16
Undefined R/W Specify the repeat size or block size.
When H'0001 is set, the repeat or block size is one byte,
one word, or one longword. When H'0000 is set, it
means the maximum value (refer to table 7.1). While the
DMA is in operation, the setting is fixed.
15 to 0 BKSZ15 to
BKSZ0
Undefined R/W Indicate the remaining repeat or block size while the
DMA is in operation. The value is decremented by 1
every time data is transferred. When the remaining size
becomes 0, the value of the BKSZH bits is loaded. Set
the same value as the BKSZH bits.
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Содержание H8SX series
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