H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 238
H8S-2350
Manufacturer Part Number
H8S-2350
Description
16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.H8S-2350.pdf
(1025 pages)
- Current page: 238 of 1025
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Section 7 DMA Controller (DMAC)
(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.
Rev. 3.00 Sep 15, 2006 page 204 of 988
REJ09B0330-0300
Transfer Number Storage
Bit
ETCRH
Initial value
R/W
Transfer Counter
Bit
ETCRL
Initial value
R/W
:
:
:
:
:
:
:
:
R/W
R/W
15
*
7
*
R/W
R/W
14
6
*
*
R/W
R/W
13
*
5
*
R/W
R/W
12
4
*
*
R/W
R/W
11
*
3
*
R/W
R/W
10
*
2
*
R/W
R/W
9
*
1
*
*: Undefined
R/W
R/W
8
0
*
*
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