6 Replies Latest reply on Jun 16, 2020 8:23 PM by KyGr_1968351

    External clock for a timer

    ThBa_1159851

      I want connect an external clock (16 MHz) to a TCPWM for better accuracy. But I can't get it right.

         

      I connected the external clock to Pin [0.6] and mapped it in the "configure system clock" - window to EXTCLK.
      In the same window I routed the EXTCLK to "Routed2" and was then able to configure the clock-component in the TopDesign to the existing clock "Routed2".

         

      I get the error:

         
      Pin guidance unavailable: Invalid connection for clock input "\IVC_S1_Timer:cy_m0s8_tcpwm_1\:clock"  driven from "ClockBlock:dsi_in_1". The component requires a clock from the clock block.
         

      I tried also another pin and configured and routed it as "DigitalSignal" with the same result.

         

      Is there somewhere a tutorial on how to use an external clock with PSoC 4?
      What is a "clock from the clock block"?

         

      Thanks
      Thomas