HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 222
HD6412240
Manufacturer Part Number
HD6412240
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412240.pdf
(818 pages)
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Section 7 Data Transfer Controller
7.2
7.2.1
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.
Bit 7
SM1
0
1
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.
Bit 5
DM1
0
1
Rev.3.00 Mar. 26, 2007 Page 180 of 772
REJ09B0355-0300
Bit
Initial value
R/W
Register Descriptions
DTC Mode Register A (MRA)
Bit 6
SM0
—
0
1
Bit 4
DM0
—
0
1
:
:
:
Unde-
fined
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)
Unde-
fined
SM0
—
6
Unde-
DM1
fined
—
5
Unde-
fined
DM0
—
4
Unde-
MD1
fined
—
3
Unde-
MD0
fined
—
2
Unde-
fined
DTS
—
1
Unde-
fined
Sz
—
0
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