Datasheet

Table Of Contents
Section 8 Data Transfer Controller (DTC)
Page 208 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
8.2.1 DTC Mode Register A (MRA)
MRA selects the DTC operating mode.
Bit Bit Name Initial Value R/W Description
7
6
SM1
SM0
Undefined
Undefined
Source Address Mode 1 and 0
These bits specify an SAR operation after a data transfer.
0×: SAR is fixed
10: SAR is incremented after a transfer
(by +1 when Sz = 0; by +2 when Sz = 1)
11: SAR is decremented after a transfer
(by –1 when Sz = 0; by –2 when Sz = 1)
5
4
DM1
DM0
Undefined
Undefined
Destination Address Mode 1 and 0
These bits specify a DAR operation after a data transfer.
0×: DAR is fixed
10: DAR is incremented after a transfer
(by +1 when Sz = 0; by +2 when Sz = 1)
11: DAR is decremented after a transfer
(by –1 when Sz = 0; by –2 when Sz = 1)
3
2
MD1
MD0
Undefined
Undefined
DTC Mode
These bits specify the DTC transfer mode.
00: Normal mode
01: Repeat mode
10: Block transfer mode
11: Setting prohibited
1 DTS Undefined 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
0 Sz Undefined DTC Data Transfer Size
Specifies the size of data to be transferred.
0: Byte-size transfer
1: Word-size transfer
Legend:
×: Don’t care