HD6432646 Hitachi, HD6432646 Datasheet - Page 224
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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Bit 7—DTC Software Activation Enable (SWDTE): Enables or disables DTC activation by
software.
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 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.
8.2.9
MSTPCRA is a 8-bit readable/writable register that performs module stop mode control.
When the MSTPA6 bit in MSTPCRA is set to 1, the DTC operation stops at the end of the bus
cycle and a transition is made to module stop mode. However, 1 cannot be written in the MSTPA6
bit while the DTC is operating. For details, see section 22.5, Module Stop Mode.
MSTPCRA is initialized to H'3F by a reset and in hardware standby mode. It is not initialized in
software standby mode.
190
Bit
Initial value
Read/Write
Module Stop Control Register A (MSTPCRA)
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
MSTPA7
R/W
7
0
MSTPA6
R/W
6
0
MSTPA5
R/W
5
1
MSTPA4
R/W
4
1
MSTPA3
R/W
3
1
MSTPA2
R/W
2
1
MSTPA1
R/W
1
1
(Initial value)
MSTPA0
R/W
0
1
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