Systems and circuits with multirange and localized detection of valid power

Abstract

Methods and systems for automatically and / or locally adjusting power-valid detection. In one class of embodiments, local power-on-reset circuits are included in individual power islands; in another class of embodiments, the power-on-reset circuit is automatically reprogrammed, depending on the detected interface voltage level, to use the same circuitry for power-valid detection in either case.

Description

technical field [0001] The present application relates to low-power integrated circuits (and methods and systems including low-power integrated circuits), and more particularly to low-power integrated circuits (and methods and systems including methods and systems for such integrated circuits). Background technique [0002] One of the fundamental requirements of digital integrated circuits is some way to avoid operating with inappropriate supply voltages. Some digital circuits can enter unpredictable states when the supply voltage is too low. With programmable binary logic, this unpredictable state could result in the device being locked out and inoperable. [0003] To avoid this, integrated circuits very commonly include dedicated circuitry for detecting whether the supply voltage is within its valid range. Such circuits are often referred to as "power-on-reset" or POR circuits because they typically assert a reset signal upon power-up. When the POR circuit detects that...

AI Technical Summary

Problems solved by technology

This can lead to unpredictable loss of bits or blocks at the beginning of transmission, or state errors at the receiver

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