Multiple independent I/O functions on a PCMCIA card share a single interrupt request signal using an AND gate for triggering a delayed RESET signal
US5805929A · kind A · utility
18Cited by
19References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Jan 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A PCMCIA card comprises a plurality of I/O functions. Each has an interrupt signal, but the card has only one interrupt request (IREQ) line. The card is provided with an interrupt status register (ISR) to receive the interrupt signals from each of the I/O functions. This ISR allows software to determine the function that signaled the interrupt. The card is also provided with interrupt control logic (ICL) that is responsive to the interrupt status of ISR. The ICL sends an IREQ signal to a host system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.