Patent ID: 7676667
Filing Date: 2010-03-09
Classification: G06F

Abstract:
1. A boot control apparatus of a micro controller unit comprising: a register comprising a first pin and a second pin; a reset signal generating circuit coupled to the first pin for outputting a reset signal to the first pin, the reset signal generating circuit being powered by a power supply source; and a controlling circuit comprising a detecting circuit and a time delay circuit, wherein the detecting circuit comprises a voltage division circuit and a switch circuit connected in series, the voltage division circuit is for dividing the power supply source to obtain a first signal, the detecting circuit is for outputting a control signal to the second pin of the register according to the first signal; wherein the register is capable of sending a command to the micro controller unit to allow the micro controller unit to execute a warm boot if the first pin receives a reset signal and the second pin is at a low level, and sending another command to the micro controller unit to allow the micro controller to execute a cold boot if the first pin receives a reset signal and the second pin is at a high level.