In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Just to throw another option out there. You could connect the RPM signal to the RTCC pin and use that to get a count of the RPM signal.

Basically you would setup RTCC to count from external input using "OPTION = %1111_1000"
Then clear the counter by using "RTCC = 0"
Then update the display for 1 second (you might have to adjust the PAUSE value to get this as close as possible).
Then do "rpm = RTCC" and "rpm = rpm * 60"

That is how I would do it...

Bean.

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