The Zilog Z80 is an 8-bit microprocessor designed by Zilog that played an important role in the evolution of early computing. Launched in 1976, it was designed to be software-compatible with the Intel 8080, offering a compelling alternative due to …

2021年10月3日 · 近几十年来，Zilog 重新关注不断增长的嵌入式系统市场，最新的 Z80 兼容微控制器系列、具有线性16 MB地址范围的全流水线 24 位 eZ80与更简单的 Z80 和Z180一起成功推出各自产品。 Z80 诞生于物理学家和工程师Federico Faggin，Federico Faggin于 1974 年底离开英特尔，与Ralph Ungermann 一起创立Zilog 。 在飞兆半导体（Fairchild Semiconductor International, Inc.是一家位于加利福尼亚州圣何塞的美国半导体公司。 成立于 1957 年，作 …

原始Z80的最高频率是2.5 MHz，Z80A則可以使用到4 MHz频率，後來推出的Z80B最高可以使用6 MHz频率。 之後還有8MHz、10MHz的版本。 Z80原使用NMOS製程，後來也有生產CMOS製程的Z80。

Z80 CPU User Manual 1 Architectural Overview Zilog’s Z80 CPU family of components are fourth-generation enhanced microprocessors with exceptional computational power. They offer higher system throughput and more efficient memory utilization than comparable second and third-generation microproces-sors.

z80 单板机具有体积小，外设搭配灵活，运行可靠等特点，因此在以后的十几年时间里，z80 单板机被广泛的应用于 pc 机接口及扩展和各种工业、控制领域，尤其是在美国和日本得到了极大的发展。

Z80微机的早期应用主要是将构成计算机系统的Z80微处理器，RAM，ROM和输入/出接口等电路都组合在一块PCB板卡上面，因此这时期的Z80微机系统也叫Z80单板机（SBC，Single Board computer）。

The Z80 microprocessor is an 8 bit CPU with a 16 bit address bus capable of direct access of 64k of memory space. It has a language of 252 root instructions and with the reserved 4 bytes as prefixes, acceses an additional 308 instructions. The Z80 was modeled after the 8080 and contains the 78 - 8080 opcodes as a subset to it's language.

The Z80 and Z80A CPUs are third generation single chip microprocessors with unrivaled computational power. This increased computational power results in higher system through-put and more efficient memory utilization when compared to second generation microprocessors. In addition, the Z80 and Z80A CPUs are very easy to imple-

Zilog Z80 CPU CPU: detailed specifications, side by side comparison, pictures and more from CPU-World

Use external hardware to generate an NMI every 2mS and change the state of bit D7 in the R Register via software.