MICROPROCESSOR BUS STRUCTURE

• Main Authors: GORDON J ROBINS, SENZIG DONALD NORMAN
• Format: Patent
• Language: English
• Published: 29.06.2001
• Edition: 7
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

PROBLEM TO BE SOLVED: To design a processor chip so as to be provided with a unidirectional input/output bus or a bi-directional input/output bus to be optionally selected. SOLUTION: This processor is designed at a state that separate input bus and output bus are provided inside a chip. A gating network is coupled with the processor unidirectional buses so that the chip is provided with an alternative externally-wired bus structure. Only one set of bi-directional bus signal lines is wired outside the chip for the lowest cost and lowest performance. A true unidirectional bus is generated by gating the bi-directional bus so as to be a bus exclusive for device output and gating an alternative device input bus to a processor input bus for high performance operation in which high cost for high band width is justified. A bus enable signal line is wired at a proper state according to wired microprocessor bus structure.