INTEGRATED CIRCUIT FOR INCORPORATION OF MICROCONTROLLER AND METHOD FOR REDUCTION OF POWER CONSUMPTION BY IT

摘要

PURPOSE: To provide a weak pull-up disabling method used in relation to a microcontroller which is incorporated in an integrated circuit and its mechanism. CONSTITUTION: Weak pull-up disabling mechanism is incorporated in the integrated circuit adding the microcontroller 40. The mechanism disables the weak pull-upt of an I/O buffer in the microcontroller 40. Weak pull-up is functioned so as to pull-up the voltage of a related port to high. Weak pull-up is disabled so that the necessity of a driver for sinking current in an input mode is removed. The removal of the necessity of the external driver by weak pull-up disabling mechanism reduces the power consumption of the integrated circuit.