摘要 |
PURPOSE: A power switching device of a mobile communication terminal is provided to control power without using another transistor or another diode, by using a CPLD(Complex Programmable Logic Device), thereby reducing power consumption and a production cost. CONSTITUTION: A power switch hold signal input end(PS_HOLD) supplies a power enable signal(P_EN) to an MSM(50) through a VHDL(VHSIC Hardware Description Language) device(60). A power on switch input end(PWR_ON_SW), which is an inner signal of a mobile communication terminal, supplies a sense signal(ON_SW_SENSE) showing that a power switch is turned on to the MSM(50) through the VHDL device(60). A charger power input end(VEXT_DC) and a test point input end(TP) of the terminal supply an external power sense signal(EXT_PWR_SENSE) and an external analog digital conversion signal(EXT_DC_ADC) to the MSM(50) through the VHDL device(60). |