R01UH0823EJ0100 Rev.1.00
Page 356 of 1823
Jul 31, 2019
RX23W Group
18. DMA Controller (DMACA)
18.2.13
DMA Module Activation Register (DMAST)
DMST Bit (DMAC Operation Enable)
When this bit is set to 1, DMAC activation is enabled for all channels.
When 1 is written to the DMACm.DMCNT.DTE bit (DMA transfer is enabled) of multiple channels and then this bit is
set to 1 (DMAC activation is enabled), the corresponding multiple channels can be placed in the transfer request
acceptable state at the same time.
When the DMST bit is cleared to 0 during DMA transfer, DMA transfer is suspended after completion of the current data
transfer corresponding to a single transfer request. DMA transfer is resumed by setting the DMST bit to 1 again.
[Setting condition]
When 1 is written to this bit
[Clearing condition]
When 0 is written to this bit
Address(es): 0008 2200h
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
—
—
DMST
Value after reset:
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b0
DMAC Operation Enable
0: DMAC activation is disabled.
1: DMAC activation is enabled.
R/W
b7 to b1
—
Reserved
These bits are read as 0. The write value should be 0.
R/W