22-12-2010 дата публикации
Номер: CN0101923145A
Принадлежит:
The invention provides a power detection circuit, a portable device and a method for preventing data loss. The power detection circuit comprises a data locking circuit, a discharging unit and a switching circuit, wherein the data locking circuit is used for receiving the voltage input by a power input end; the discharging unit is coupled between the power input end and the common receiving voltage to determine whether the first end and the second end thereof are short-circuited or not according to whether power detection signals are enabled or not; and the switching circuit is coupled betweenthe power input end and the internal circuit of the portable device. During a testing period, when power detection signals are enabled, the first end and the second end of the switching circuit are open-circuited. In the testing period, if power low signals which are received by the switching circuit and are output by the data locking circuit are converted from a first state into a second state, the ...
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