Device and method for generating interrupts

Details Device and method for generating interrupts Device and method for generating interrupts

1996-05-17

1999-01-05

Sheikh, Ayaz R.

395734, 395735, 395736, G06F 946, G06F 1314

Patent

active

058571086

ABSTRACT:
A device and method for generating an interrupt for a microcontroller (MCU) are disclosed. The device includes a first storing circuit for storing signals received/transmitted through a plurality of input/output ports; a first comparing circuit for comparing the signals from the first storing circuit with a reference signal and determining a level of the signals based on the comparison result; an encoding circuit for encoding the signals output from the first comparing circuit; a second storing circuit for storing a signal received through a bus; a second comparing circuit for comparing the encoded signals received from the encoding circuit with the signal stored in the second storing circuit, and determining a level of the encoded signals based on the comparison result; an interrupt request generating circuit for generating an interrupt requesting signal based on an output of the second comparing circuit; and an interrupt enabling circuit for determining whether to permit an interrupt in response to the interrupt requesting signal from the interrupt request generating circuit.

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