Module Stop Control Register (Mstpcr) - Hitachi H8S/2338 Series Hardware Manual

Bit 7—DTC Software Activation Enable (SWDTE): Enables or disables DTC activation by
software.
Bit 7
SWDTE Description
0 DTC software activation is disabled
[Clearing condition]
When the DISEL bit is 0 and the specified number of transfers have not ended
1 DTC software activation is enabled
[Holding conditions]
•
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
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.
6.2.9

Module Stop Control Register (MSTPCR)

Bit : 15
Initial value : 0
R/W : R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
MSTPCR is a 16-bit readable/writable register that performs module stop mode control.
When the MSTP14 bit in MSTPCR is set to 1, 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 MSTP14 bit while
the DTC is operating. For details, see section 19.5, Module Stop Mode.
MSTPCR is initialized to H'3FFF by a reset and in hardware standby mode. It is not initialized in
software standby mode.
208
MSTPCRH
14 13 12 11
0 1 1 1
10 9 8 7
1 1 1 1
MSTPCRL
6 5 4 3
1 1 1 1
(Initial value)
2 1 0
1 1 1