MICROPROCESSOR SYSTEM, MICROCOMPUTER UNIT AND MICROPROCESSOR UNIT

摘要

A microprocessor, formed in a single integrated circuit, has data input/output terminals and address output terminals. A memory, external to the microprocessor, has an address input and data input/output unit. An input/output unit. An input/output peripheral transfers information to or from the external equipment. An external address has is coupled to the address output terminals of the microprocessor and to the address input of the memory. An external bus is coupled to the data input/output terminals of the microprocessor and to the data input/output unit of the memory. The microprocessor includes an arithmetic/logic unit supplying an accumulator and a data memory. A timer establishes overlapping operating cycles during a single one of which data may be transferred from the data memory to the data input of the arithmetic/logic unit producing results to the accumulator for one instruction.