Minimizing power consumption when sensing switch inputs

An app note (PDF!) from Renesas on how to minimize power consumption when sensing switch inputs A switch input is one of the simplest interfaces to an MCU. However, when very low power designs are needed the pullup or pulldown resistor for the switch can draw a significant current. If the switch input is a momentary switch the current flow is very short so it is rarely significant. However, if the switch in ...

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