Multi-function microprocessor wait state mechanism using external control line

摘要

A wait state mechanism for lengthening a microprocessor's bus cycle to allow data transfers between slower off-chip devices. A microprocessor is responsive to a bus control signal generated by external programmable logic which instructs the microprocessor to insert wait states of varying number depending on the component involved in a bus transaction. The microprocessor receives only a single input from the programmable logic and varies its bus cycle length accordingly.