459
MRA—DTC Mode Register A
H'BC00 to H'BFFF
DTC
Bit
Initial value
Read/Write
7
SM1
Undefined
—
6
SM0
Undefined
—
5
DM1
Undefined
—
4
DM0
Undefined
—
3
MD1
Undefined
—
2
MD0
Undefined
—
1
DTS
Undefined
—
0
Sz
Undefined
—
0 Byte-size transfer
Word-size transfer
DTC Data Transfer Size
1
0 Destination is repeat area
or block area
Source is repeat area or
block area
DTC Transfer Mode Select
1
0
0 Normal mode
Repeat mode
DTC Mode (MD1, MD0)
1
1
0
1
Block transfer mode
—
0 — DAR is fixed
Destination Address Mode
1
0
1
DAR is incremented after a transfer
(+1 when Sz = 0, +2 when Sz = 1)
DAR is decremented after a transfer
(–1 when Sz = 0, –2 when Sz = 1)
0 — SAR is fixed
Source Address Mode
1
0
1
SAR is incremented after a transfer
(+1 when Sz = 0, +2 when Sz = 1)
SAR is decremented after a transfer
(–1 when Sz = 0, –2 when Sz = 1)
Summary of Contents for H8S/2670
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