冯诺依曼架构:
冯诺依曼体系结构是一种数字计算机体系结构,其设计基于存储程序计算机的概念,其中程序数据和指令数据存储在同一存储器中。这座建筑是由著名的数学家和物理学家约翰·冯·诺依曼于 1945 年设计的。
哈佛建筑:
哈佛体系结构是数字计算机体系结构,其设计基于这样的概念,即指令和数据具有独立的存储和独立的总线(信号路径)。它基本上是为了克服冯诺依曼架构的瓶颈而开发的。
冯诺依曼和哈佛建筑的区别:
VON NEUMANN ARCHITECTURE | HARVARD ARCHITECTURE |
---|---|
It is ancient computer architecture based on stored program computer concept. | It is modern computer architecture based on Harvard Mark I relay based model. |
Same physical memory address is used for instructions and data. | Separate physical memory address is used for instructions and data. |
There is common bus for data and instruction transfer. | Separate buses are used for transferring data and instruction. |
Two clock cycles are required to execute single instruction. | An instruction is executed in a single cycle. |
It is cheaper in cost. | It is costly than Von Neumann Architecture. |
CPU can not access instructions and read/write at the same time. | CPU can access instructions and read/write at the same time. |
It is used in personal computers and small computers. | It is used in micro controllers and signal processing. |