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

Paul,
  Thanks, I got it working. In case your wondering it basically a reciprocal frequency counter. 

Setup counter 1 for capture/compare mode. 

Setup counter 2 for external event mode. Set R1 of counter 2 to 1000 (or whatever value). Set counter 2 to generate an interrupt when it reaches R1. 

In the interrupt routine pulse counter 1 capture pin. Read the count captured from counter 1 capture register.

Works like a charm. 

Bean.

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