INTERNAL CIRCUIT PROTECTING DEVICE AND MICROCOMPUTER HAVING IT

摘要

The present invention relates to a microcomputer including an internal circuit protection devices, and him , and more particularly to high voltage by having a protection discloses a technique for protecting the circuit by providing a supply voltage to be supplied to the semiconductor memory device, the voltage drop of the supply voltage to detect whether more than a predetermined level at a predetermined level or less . To this end, the internal circuit protection device according to the invention in combination with a high-voltage detection unit , the high voltage detection portion and the detection result of the pull-up control signal representing a supply voltage level for detecting whether the supply voltage is more than a predetermined level and outputting the result and pull-down control , is controlled by the output of the pull-down control is characterized by a configuration also includes a pull-down voltage to the supply voltage to drop .