Integrated circuit with automatic pin-strapping configuration

Abstract

An integrated circuit, in which one or more internal parameters may be automatically configured for a particular application, includes a plurality of program select pins, each being in a predetermined fixed state, and at least one configuration pin associated with a parameter to be adjusted. Jumpers on the system board to which the integrated circuit is mounted connect the mounting pad of each configuration pin with the mounting pad of a selected program select pin. Consequently, when the integrated circuit is mounted on the system board, each configuration pin receives a selected value which internal configuration circuitry detects and causes the corresponding parameter to be adjusted accordingly. Any of the program select pins may have functions in addition to the configuration function. When the system board is powered on or undergoes a reset, a processor internal to the chip scans each the configuration pin to determine its value. The processor then sets internal registers accordingly, completing the configuration process, and the chip may begin normal operation.

Description

technical field [0001] The present invention generally relates to the field of integrated circuits, and specifically relates to the configuration of internal parameters. Background technique [0002] Integrated circuits, or "chips," are usually mounted on a system board that is ultimately installed in the finished product. Typically, different manufacturers purchase integrated circuits for several (or more) different finished products. Therefore, a single-chip design must be tuned or configured for optimum performance in a particular product. Also, due to tolerances and other inaccuracies in other components, it is very important to be able to configure each chip when mounting the chips on a system board. [0003] It will be realized that it is impractical to use separate chip designs for similar applications. In the past, however, it has been impractical to fine-tune chips with external components. One prior art technique requires that designated chip pins be connected ...

AI Technical Summary

Problems solved by technology

However, in the past, it has been impractical to fine-tune the chip with external components

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