h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 210
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
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Section 8 Data Transfer Controller (DTC)
8.2
8.2.1
MRA is an 8-bit register that controls the DTC operating mode.
Bits 7 and 6—Source Address Mode 1 and 0 (SM1, SM0): These bits specify whether SAR is
to be incremented, decremented, or left fixed after a data transfer.
Bits 5 and 4—Destination Address Mode 1 and 0 (DM1, DM0): These bits specify whether
DAR is to be incremented, decremented, or left fixed after a data transfer.
Rev. 5.00 Sep 22, 2005 page 184 of 1136
REJ09B0257-0500
Bit 7
SM1
0
1
Bit 5
DM1
0
1
R/W
Bit
Initial value
Register Descriptions
DTC Mode Register A (MRA)
Bit 6
SM0
—
0
1
Bit 4
DM0
—
0
1
:
:
:
SM1
—
7
*
Description
SAR is fixed
SAR is incremented after a transfer
(by +1 when Sz = 0; by +2 when Sz = 1)
SAR is decremented after a transfer
(by –1 when Sz = 0; by –2 when Sz = 1)
Description
DAR is fixed
DAR is incremented after a transfer
(by +1 when Sz = 0; by +2 when Sz = 1)
DAR is decremented after a transfer
(by –1 when Sz = 0; by –2 when Sz = 1)
SM0
—
6
*
DM1
—
5
*
DM0
—
4
*
MD1
—
3
*
MD0
—
2
*
DTS
—
1
*
*: Undefined
Sz
—
0
*
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