微控制器 (MCU)

设计支持

入门

选择工具

培训

开发者网络

大学

 976 次查看

Often in applications with keypads, the condition can occur where a key can be held or stuck down, causing excess current consmption and reducing the battery life of a battery-operated product. This application report shows a solution. The keypad interface in this report, based on the MSP430, draws .1uA while waiting for a key press, is completely interrupt driven requring no polling, and consumes a maximum of only 2uA at 3V if all keys are pressed and held simutaneously.

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