Data transfer control circuit with interrupt status register

Details Data transfer control circuit with interrupt status register Data transfer control circuit with interrupt status register

2005-04-19

2005-04-19

Rinehart, Mark H. (Department: 2111)

Electrical computers and digital data processing systems: input/

Interrupt processing

Interrupt queuing

C710S260000, C710S262000

Reexamination Certificate

active

06883053

ABSTRACT:
A data transfer control circuit includes several data receiver-transmitters, each having an interrupt identification register. Interrupt signals from the data receiver-transmitters are combined into a single interrupt signal by an interrupt controller. One of the data receiver-transmitters has an interrupt status register with bits indicating the logic levels of the interrupt signals from each of the data receiver-transmitters. A host device that receives the interrupt signal from the interrupt controller can read the interrupt status register to determine which data receiver-transmitter caused the interrupt, then read the interrupt identification register of that data receiver-transmitter to identify the interrupt source, without having to search through the interrupt identification registers of other data receiver-transmitters.

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