h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 204

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Data Transfer Controller
7.2.8
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): Specifies enabling or disabling of DTC
software activation. To clear the SWDTE bit by software, read SWDTE when set to 1, then write 0
in the bit.
Bit 7
SWDTE
0
1
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 H'0400 + (vector number) << 1 (where << 1 indicates a 1-bit left shift). For
example, if DTVEC6 to DTVEC0 = H'10, the vector address is H'0420.
Rev. 3.00 Jan 18, 2006 page 176 of 1044
REJ09B0280-0300
Note: *
Bit
Initial value
Read/Write
DTC Vector Register (DTVECR)
A value of 1 can always be written to the SWDTE bit, but 0 can only be written after 1
is read.
Description
DTC software activation is disabled
[Clearing condition]
When the DISEL bit is 0 and the specified number of transfers have
not ended
DTC software activation is enabled
[Holding conditions]
SWDTE
R/(W) *
When data transfer ends with the DISEL bit set to 1
When the specified number of transfers end
During software-activated data transfer
7
0
DTVEC6
R/W
6
0
DTVEC5
R/W
5
0
DTVEC4
R/W
4
0
DTVEC3
R/W
3
0
DTVEC2
R/W
2
0
DTVEC1
R/W
1
0
(Initial value)
DTVEC0
R/W
0
0