Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi its the architecture of the microcontroller or microprocessor which defines the external and internal clk frequency's in 8085 it is divided by 2 before feeding it to the internal logic but in 8051 its directly used in the internal logic each instruction takes 12 clock cycle to execute. As it takes different processors like loading storing and computing in various hidden registers which are used to finish a particular instruction.