h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 216
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h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 216 of 1165
- Download datasheet (6Mb)
Section 8 Data Transfer Controller (DTC)
8.2.8
DTVECR is an 8-bit readable/writable register that enables or disables DTC activation by
software, and sets a vector number for the software activation interrupt.
DTVECR is initialized to H'00 by a reset and in hardware standby mode.
Bit 7—DTC Software Activation Enable (SWDTE): Enables or disables DTC activation by
software.
Bits 6 to 0—DTC Software Activation Vectors 6 to 0 (DTVEC6 to DTVEC0): These bits
specify a vector number for DTC software activation.
The vector address is expressed as H'0400 + ((vector number) << 1). <<1 indicates a one-bit left-
shift. For example, when DTVEC6 to DTVEC0 = H'10, the vector address is H'0420.
Rev. 5.00 Sep 22, 2005 page 190 of 1136
REJ09B0257-0500
Bit 7
SWDTE
0
1
Bit
Initial value
R/W
Notes: 1. Only 1 can be written to the SWDTE bit.
DTC Vector Register (DTVECR)
2. Bits DTVEC6 to DTVEC0 can be written to when SWDTE = 0.
Description
DTC software activation is disabled
[Clearing conditions]
•
•
DTC software activation is enabled
[Holding conditions]
•
•
•
:
:
:
When the DISEL bit is 0 and the specified number of transfers have not ended
When 0 s written to the DISEL bit after a software-activated data transfer end
interrupt (SWDTEND) request has been sent to the CPU
When the DISEL bit is 1 and data transfer has ended
When the specified number of transfers have ended
During data transfer due to software activation
SWDTE
R/(W)
7
0
*1
DTVEC6
R/(W)
6
0
*2
DTVEC5
R/(W)
5
0
*2
DTVEC4
R/(W)
4
0
*2
DTVEC3
R/(W)
3
0
*2
DTVEC2
R/(W)
2
0
*2
DTVEC1
R/(W)
1
0
*2
(Initial value)
DTVEC0
R/(W)
0
0
*2
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