CIRCUIT FOR PREVENTING ERRONEOUS OPERATION IN POWER ON RESET

摘要

PURPOSE: A circuit for preventing erroneous operation in power on reset is provided to prevent erroneous operation of a magnetic head by doubly resetting a gate array in power on reset. CONSTITUTION: A power on reset signal generated in power on reset is applied to a reset terminal of a CPU(10) and an OR gate(14) in a hard disk drive. The CPU is reset to generate a reset signal, and applies the reset signal to the OR gate. The OR gate generates a high state signal if any one of the power on reset signal and the reset signal is in a high state. The high state signal generated from the OR gate is applied to a reset terminal of a gate array(12). The gate array is reset according to the signal generated from the OR gate and the reset signal generated from the CPU.