Microprocessor Essay

BTEC HNC/HND Electrical/Electronic Engineering
HNEE 010 Microprocessor Systems-H1

Mohammed Hussein Baker 07630

Question 1.
a) Comparisons of microprocessor-based systems.

8-bit microprocessors:
Intel 8085:

Intel Corporation produced the first 8085 microprocessor in the late 1970s, it was a replacement for the 8080 unit. The 8085 operated at a different core clock speed of 3.5-6 megahertz. This processor was an 8-bit core, it allows 8 sets of data across 64 bytes so that each area could be accessed. NASA used this microprocessor in the early 1980s to launch missions. This microprocessor became a popular controller for amateurs, electronics such as circuit boards, the 8085 was a common use for rockets missions and satellites until the early 2002, but it was then replaced by a more powerful microprocessor.[1] The “5” in the model number means that the processor only requires 5 volts of power supply. The architecture of this processor follows the von Newmann Architecture ( this is a design model for a stored program digital computer that uses a central processing unit and a single separate computer storage structure which can hold both instructions and data). The 8085 incorporated all the features of the 8224 clock generator and the 8228 system controller, in order to increase the system integration. This microprocessor used a multiplexed data bus and required an 825x-5 support chip, the address was split between the 8 bit address bus and the 8 bit data bus. The on chip address latch of memory chips allowed a direct interface with the 8085, the processor was designed using NMOS circuitry and the later H version (HMOS). The 8085 CPU was a part of a larger family of chips developed by Intel to build a complete system. Although it was not very successful the supporting