Rev.6.00 Oct.28.2004 page 244
of 1016
REJ09B0138-0600H
8.2
Register Descriptions
8.2.1
DTC Mode Register A (MRA)
Bit
:
7
6
5
4
3
2
1
0
SM1
SM0
DM1
DM0
MD1
MD0
DTS
Sz
Initial value :
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
Unde-
fined
R/W
:
—
—
—
—
—
—
—
—
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
Bit 6
SM0
Description
0
—
SAR is fixed
1
0
SAR is incremented after a transfer
(by +1 when Sz = 0; by +2 when Sz = 1)
1
SAR is decremented after a transfer
(by –1 when Sz = 0; by –2 when Sz = 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
Bit 4
DM0
Description
0
—
DAR is fixed
1
0
DAR is incremented after a transfer
(by +1 when Sz = 0; by +2 when Sz = 1)
1
DAR is decremented after a transfer
(by –1 when Sz = 0; by –2 when Sz = 1)
Bits 3 and 2—DTC Mode (MD1, MD0): These bits specify the DTC transfer mode.
Bit 3
MD1
Bit 2
MD0
Description
0
0
Normal mode
1
Repeat mode
1
0
Block transfer mode
1
—
Содержание ZTAT H8S/2357F
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