h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 216
h8s-2138
Manufacturer Part Number
h8s-2138
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2138.pdf
(1061 pages)
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Section 7 Data Transfer Controller [H8S/2138 Group]
7.2
7.2.1
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
0
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
0
1
Rev. 4.00 Jun 06, 2006 page 162 of 1004
REJ09B0301-0400
Bit
Initial value
Read/Write
DTC Mode Register A (MRA)
Register Descriptions
Bit 6
SM0
—
0
1
Bit 4
DM0
—
0
1
Unde-
SM1
fined
—
7
Description
SAR is fixed
SAR is incremented after a transfer
(by 1 when Sz = 0; by 2 when Sz = 1)
SAR is decremented after a transfer
(by 1 when Sz = 0; by 2 when Sz = 1)
Description
DAR is fixed
DAR is incremented after a transfer
(by 1 when Sz = 0; by 2 when Sz = 1)
DAR is decremented after a transfer
(by 1 when Sz = 0; by 2 when Sz = 1)
Unde-
fined
SM0
—
6
Unde-
DM1
fined
—
5
Unde-
DM0
fined
—
4
Unde-
MD1
fined
—
3
Unde-
MD0
fined
—
2
Unde-
fined
DTS
—
1
Unde-
fined
Sz
—
0
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