HD6412350 Hitachi, HD6412350 Datasheet - Page 220
HD6412350
Manufacturer Part Number
HD6412350
Description
(HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
Manufacturer
Hitachi
Datasheet
1.HD6412350.pdf
(989 pages)
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(2) Repeat Mode
In repeat mode, ETCR functions as transfer counter ETCRL (with a count range of 1 to 256) and
transfer number storage register ETCRH. ETCRL is decremented by 1 each time a transfer is
performed, and when the count reaches H'00, ETCRL is loaded with the value in ETCRH. At this
point, MAR is automatically restored to the value it had when the count was started. The DTE bit
in DMABCR is not cleared, and so transfers can be performed repeatedly until the DTE bit is
cleared by the user.
ETCR is not initialized by a reset or in standby mode.
7.2.4
DMACR is an 8-bit readable/writable register that controls the operation of each DMAC channel.
DMACR is initialized to H'00 by a reset, and in standby mode.
200
Transfer Number Storage
Bit
ETCRH
Initial value
R/W
Transfer Counter
Bit
ETCRL
Initial value
R/W
DMACR
Initial value
R/W
Bit
DMA Control Register (DMACR)
:
:
:
:
:
:
:
:
:
:
:
:
DTSZ
R/W
R/W
R/W
15
7
0
*
7
*
DTID5
R/W
R/W
R/W
14
6
0
6
*
*
RPE
R/W
R/W
R/W
13
5
0
5
*
*
DTDIR
R/W
R/W
R/W
12
4
0
*
4
*
DTF3
R/W
R/W
R/W
11
3
0
3
*
*
DTF2
R/W
R/W
R/W
10
2
0
2
*
*
DTF1
R/W
R/W
R/W
1
0
9
1
*
*
*: Undefined
DTF0
R/W
R/W
R/W
0
0
8
*
0
*
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