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¡ Semiconductor
CPU INTERFACE EXAMPLES
1) Interface when DMA controler is used (16-bit bus)
Memory
M9842
DMA
Controller
MCU
D15 to 0
DREQL
DACKL
IOW
DREQR
DACKR
RD
WR
CS
D/C
Data bus
2) MCU & external memory interface (16-bit bus)
Memory
M9842
MCU
D15 to 0
DREQL
DACKL
IOW
RD
WR
CS
D/C
CH
EMP
MID
FUL
Data bus
FEDL9842-02
MSM9842
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