Flexible interrupt system for an integrated circuit

Details Flexible interrupt system for an integrated circuit Flexible interrupt system for an integrated circuit

1996-07-26

1999-01-12

An, Meng-Ai T.

G06F 946

Patent

active

058600132

ABSTRACT:
A flexible interrupt system for presenting interrupt signal to a microcontroller located on an integrated circuit responds to either on chip or off chip components. An interrupt circuit is connected to each bonding pad and is also connected to interrupt control logic which establishes priority for interrupt signals from the components located on chip. All interrupt signals pass through a common node in the interrupt circuit. A p channel transistor and a n channel transistor connected to the common node function as a pull up or pull down so that the microcontroller senses the rising or falling edge of the interrupt request. Since the interrupt request signals from either on chip components or off chip components pass through the common node, and the common node is directly coupled to a pad, system development and debug is simplified.

REFERENCES:
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patent: 4896266 (1990-01-01), Klashka et al.
patent: 5634034 (1997-05-01), Foster
patent: 5649208 (1997-07-01), Intrafer et al.
patent: 5680599 (1997-10-01), Juggar
patent: 5737548 (1998-04-01), Yach et al.

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