一键开启和关闭的微处理器

摘要：结合低压差（LDO）线性稳压器，具有一个或门产生电路，允许一个单一的按钮来打开和关闭一个基于微处理器的便携式系统。

Maxim/Dallas > App Notes > CIRCUIT PROTECTION MICROPROCESSOR SUPERVISOR CIRCUITS

Keywords: microprocessor, LDO regulator, microprocessor reset Jul 19, 2004

APPLICATION NOTE 3283
One Button Turns Microprocessor On and Off

Combining a low-dropout (LDO) linear regulator with an OR gate produces a circuit that allows a single
pushbutton to turn a microprocessor-based portable system on and off.


When placing a microprocessor-based portable device in your desk drawer for weeks or months, you should, of
course, turn it off to save battery capacity (unless it requires power to maintain storage of volatile data or to
keep a real-time-clock running). To save as much power as possible, it's usually best to turn off the processor,
its peripherals, and