By examining the Quick reference for the pyboard, we see that X1 is connected to canal 1 (''channel 1'') du Timer 5 (noté ''TIM5 CH1'' sur le schéma). | By examining the Quick reference for the pyboard, we see that X1 is connected to canal 1 (''channel 1'') du Timer 5 (noté ''TIM5 CH1'' sur le schéma). |