Hitachi H8S/2678 Series Reference Manual page 476

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