Z80 Datasheet, PDF (70/330 Pages) Zilog, Inc. – Z80 CPU PERIPHERALS

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7UGT /CPWCN

Enable
DMA
Release Bus
(CPU Executes
at least one
Machine Cycle)
RDY
NO
Active
?
YES
Request Bus
Transfer/Search One Byte
(See Figure 20)
NO
End
of Block
?
YES
Set Status Flag
Figure 21. Byte Mode
• Interrupt
• Release Bus
• Auto Restart
UM008101-0601
Direct Memory Access