Hi Guys, sorry for asking such a stupid question. I am newbie. I was trying to measure engine speed by using variable reluctance sensor. But , it seems like etpu is not able to detect any transition of this input signal. Is this because slew rate of variable reluctance sensor output signal is way too small ?
Can I say that for input signal to be considered by Etpu as a "transition", input signal slew rate has to fall between min/max fall/rise time (Etpu PAD AC spec attached below) ?
another possible reason i could figure for transition not detecting is amplitude of signal. May be my VR sensor output signal is not high enough? Waveform of VR sensor output is attached below for your reference.
Thanks a lot for your help!
Hi, you cannot connect it directly as eTPU inputs/outputs are DIGITAL I/O. In case you need to process ANALOG signals, you have to use sample analog signal by ADC module and perform certain signal processing.
As inspiration I can show you scheme of connection of resolver and basic application scheme of eTPU resolver function (see interconnection with eQADC module) - picture taken from AN3943.
Hi, you cannot connect it directly as eTPU inputs/outputs are DIGITAL I/O. In case you need to process ANALOG signals, you have to use sample analog signal by ADC module and perform certain signal processing.
As inspiration I can show you scheme of connection of resolver and basic application scheme of eTPU resolver function (see interconnection with eQADC module) - picture taken from AN3943.
