Patent ID: 7843172

Claim:
A battery charging controller configured to control a charging of a battery, the battery charging controller comprising: a charging circuit configured to detect an insertion for an alternating current adapter, and then to output an adapter detection signal; an ON cause detector configured to receive the adapter detection signal, and then to output an ON cause detection signal indicating that the alternating current adapter is inserted; an oscillator configured to be started by a detection of the ON cause detection signal, and then to send a timing signal; a starting controller configured to be started by the adapter detection signal, and then to send a regulator control signal for starting a regulator in accordance with the adapter detection signal and the timing signal, and to output a reset signal after a predetermined time elapses from a point in time at which the regulator control signal is sent; and a central processing unit configured to be started by a signal outputted from the regulator, and then to generate a charging-control signal for the battery charging in accordance with the adapter detection signal and the timing signal, and then to output the charging-control signal to the charging circuit.