Interface circuit for single-chip microprocessor

Details Interface circuit for single-chip microprocessor Interface circuit for single-chip microprocessor

1987-11-25

1989-06-13

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 1300

Patent

active

048397954

ABSTRACT:
An interface circuit, having a single-chip microprocessor with program instructions in internal memory, includes switching devices between A-D (Analog to Digital) ports of the microprocessor and ports of the interface circuit for selectively connecting and disconnecting the microprocessor and interface ports. The interface circuit includes a connector through which address latch units and external memory having program instructions can be connected to the single-chip microprocessor. The connector provides for switch over of operation of the microprocessor from internal memory to external memory, and for operation of the switching devices. The connector provides for connection of an I/O (Input/Output) unit to provide input and output to ports of the interface circuit.

REFERENCES:
patent: 3766526 (1973-10-01), Buchanan
patent: 3806878 (1974-04-01), Edstrom
patent: 3833930 (1974-09-01), Macker
patent: 4442504 (1984-04-01), Dummerermuth et al.
patent: 4514805 (1985-04-01), McDonough
patent: 4628158 (1986-12-01), Rubin
"MCS--96 Hardware Design Information", Chpt. 12 and 14, Intel; pp. 12-1 to 12-57 and 14-1 to 14-39.

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