Fujitsu FR81S User Manual
CHAPTER 8: DMA CONTROLLER (DMAC)
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : DMA CONTROLLER (DMAC)
FUJITSU SEMICONDUCTOR CONFIDENTIAL
44
When the interrupt request is cleared and the interrupt level drops to LVL[4:0] or lower level, the DMA
transfer restarts.
Table 5-7 LVL[4:0] Settings to Suppress DMA Transfer
LVL[4:0]
DMA suppress control
11111
Suppresses the DMA transfer when any peripheral interrupt request is issued. (initial value)
11110
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 1E
H
is issued.
11101
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 1D
H
is issued.
11100
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 1C
H
is issued.
11011
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 1B
H
is issued.
11010
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 1A
H
is issued.
11001
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 19
H
is issued.
11000
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 18
H
is issued.
10111
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 17
H
is issued.
10110
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 16
H
is issued.
10101
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 15
H
is issued.
10100
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 14
H
is issued.
10011
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 13
H
is issued.
10010
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 12
H
is issued.
10001
Suppresses the DMA transfer when a peripheral interrupt request having a level higher than 11
H
is issued.
10000
Does not suppress the DMA transfer when a peripheral interrupt request is issued.
MB91520 Series
MN705-00010-1v0-E
343