Z80 Datasheet, PDF (161/330 Pages) Zilog, Inc. – Z80 CPU PERIPHERALS

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System
Buses
CPU
+5V
INT
+5V
IEI
ZC/TO1
CTC
ZC/TO2 INT
IEO
RxCA
TxCA
RxCB
TxCB
W/RDYA
W/RDYB
SIO
Common: A16–A0
D7–D0
CLK
INT
BUSREQ
M1
IORQ
DMA
MREQ
RD
WR
INT
RDY
IEI
IEO
INT
IEI
RDY
DMA
Figure 55. DMA-SIO Environment
Using The Z80 DMA With Other Processors
The Z80 DMA offers great versatility and is a powerful alternative for
board designers. Because the DMA is designed as a member of the Z80
Family, it requires certain signals and bus characteristics, such as those of
UM008101-0601
Direct Memory Access