I have implemented a test of the CPU voltage using the LVD and instructions found in Renesas app note R01AN3492EU0101.
I initially configured my test to generate an NMI if the CPU voltage fell below 2.99 volts. I didn't expect that I'd get an NMI in this case and I didn't.
Next, in order to validate that I had set everything up correctly (and since my CPU voltage is constant), I reconfigured my test to generate an NMI if the CPU voltage _exceeded_ 2.85 volts. But still no NMI.
My question is: will the low voltage detector generate an NMI if it sees the CPU voltage in violation of its configured limit? Or will it do so only when the CPU voltage actively _moves past_ its configured limit? In other words, is it looking for an edge? (that I'm not giving it in my experiment)
Any advice appreciated!
Erik