1 Reply Latest reply on Jan 18, 2017 10:54 PM by anii

    Capacitors on pin SEL27 and SEL48, CY7C65632-48

    adam_2243746

      Hi,

         

      I am working on a project that uses the CY7C65632-48 USB Hub. As a reference I have looked into the schematic of the CY4607 HX2VL Very Low-Power USB 2.0 Compliant 4-Port Hub Development Kit (http://www.cypress.com/documentation/development-kitsboards/cy4607-hx2vl-very-low-power-usb-20-compliant-4-port-huband noticed that the pins of SEL27 and SEL48 are connected to the VCC and to 0.1uF capacitors which are placed right next to these pins in the layout. According to the datasheet and the application note these pins are "Clock source selection inputs". I would be grateful if you could help me to understand why those capacitors are needed on those two pins.

         

      Kind regards,
      Adam