I'm using an UC3C2512C for measuring frequency on a signal 40 Hz to 4 KHz. This works fine and I'm using Capture mode for TC0 channel 2. So I just read the RA value and calculate the frequency from clock frequency. At to low frequency I get overflow by "covfs" interrupt so I can detect to low frequency. A small value in RA gives me to high frequency. But when I lose the signal totaly it generates one overflow interrupt a think? or not?
Is there someone that have some idea of how to detect loss of the signal?