Pattern driven interrupt in a digital data processor

Details Pattern driven interrupt in a digital data processor Pattern driven interrupt in a digital data processor

1986-07-28

1990-10-02

Shaw, Gareth D.

Communications: electrical

Digital comparator systems

364900, 3649411, 3649417, 3649472, 371 24, G06F 702

Patent

active

049610678

ABSTRACT:
A digital data processor of the type having a plurality of data inputs and a plurality of data latches, each coupled to one of said data inputs is modified to accomodate pattern driven interrupt. A plurality of bit comparators, each having inputs coupled to one of the said data inputs and one of said data latches, compare the input pattern to a stored pattern. The outputs of the bit comparators are ANDed to indicate one of a match and a mis-match between the two patterns. Interrupt generation logic is selectable to generate an interrupt request on one of the match and mis-match indications. The apparatus and method are particularly suited to use in a microcontroller which requires fast and software-efficient pattern driven interrupt.

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