Single — chip Microprocessors

Abstract

Some years after the introduction of the second generation of 8-bit microprocessors, the rapidly expanding market revealed a wealth of applications which required only modest provision of program and data storage and I/O lines. Many of these were in domestic equipment and simple machinery such as petrol pumps. Improvements in manufacturing techniques enabled an 8-bit processor, 1K bytes of ROM and 64 bytes of RAM, together with 20 or more I/O lines to be fabricated on a single chip. The result is a single package which needs only a clock supply and a reset signal to produce a complete microprocessor system.