On-chip oscillator and test method therefor

摘要

An integrated circuit device includes an oscillator; a counter; a switch for selectively connecting the oscillator to the counter in a test mode; and an output circuit for providing the output count generated by the counter for determining the frequency of the oscillator. Thus, use is made of the normal on-chip counter in an integrated circuit to provide a reliable way of measuring the frequency of the on-chip oscillator. <IMAGE>