p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 166

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Data Transfer Controller (DTC)
7.2.1
MRA selects the DTC operating mode.
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Rev. 1.00 Sep. 21, 2006 Page 128 of 658
REJ09B0310-0100
Bit
7
6
5
4
3
2
1
0
Bit Name
SM1
SM0
DM1
DM0
MD1
MD0
DTS
Sz
Don't care
DTC Mode Register A (MRA)
Initial Value
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
R/W Description
—
—
—
—
—
—
—
—
Source Address Mode 1, 0
These bits specify an SAR operation after a data transfer.
0*: SAR is fixed
10: SAR is incremented after a transfer
11: SAR is decremented after a transfer
Destination Address Mode 1, 0
These bits specify a DAR operation after a data transfer.
0*: DAR is fixed
10: DAR is incremented after a transfer
11: DAR is decremented after a transfer
DTC Mode
These bits specify the DTC transfer mode.
00: Normal mode
01: Repeat mode
10: Block transfer mode
11: Setting prohibited
DTC Transfer Mode Select
Specifies whether the source side or the destination side
is set to be a repeat area or block area in repeat mode or
block transfer mode.
0: Destination side is repeat area or block area
1: Source side is repeat area or block area
DTC Data Transfer Size
Specifies the size of data to be transferred.
0: Byte-size transfer
1: Word-size transfer
(by +1 when Sz = 0, by +2 when Sz = 1)
(by –1 when Sz = 0, by –2 when Sz = 1)
(by +1 when Sz = 0, by +2 when Sz = 1)
(by –1 when Sz = 0, by –2 when Sz = 1)