Peripheral port with volatile and non-volatile configuration
US5402014A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Jul 14, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/17708
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An embodiment of this invention provides an integrated circuit (IC) having a configurable peripheral port which includes an input/output pin, a multiplexer coupled to the input/output pin, volatile configuration bits to control the multiplexer, and non-volatile configuration bits to control the multiplexer and override the volatile configuration bits. One embodiment of an IC also includes a peripheral port as above and functional units, such as programmable array logic (PAL) and erasable programmable read only memory (EPROM), coupled to the multiplexer. In another embodiment, a non-volatile configuration bit from a functional unit configures an input/output pin when the configuration bit is not needed by the functional unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.