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ZiLOG Z80 Handbook

ZiLOG Z80
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further processing until the memory or I/O device controller has
had time to respond. External memories must be capable of re-
sponding in a little over one T cycle, or 250 nanoseconds for a 4-
MHz clock, while input/output device controllers transferring data
to the CPU have about two T cycles or 500 nanoseconds.
40

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ZiLOG Z80 Specifications

General IconGeneral
ManufacturerZiLOG
Introduction Year1976
Clock Speed2.5 MHz to 20 MHz
Data Width8-bit
Address Width16-bit
Instruction SetZ80
Transistor Count8, 500
Package40-pin DIP
CategoryMicroprocessor
Memory Address Space64 KB
Voltage Supply5V

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