====Ruteo de USB====

===Lectura recomendada===
  * [[http://ww1.microchip.com/downloads/en/AppNotes/en562810.pdf|AN 1517 PCB Layout Guide for USB Hubs]]
  * http://electronics.stackexchange.com/questions/48467/2-layer-usb-2-0-high-speed-routing
  * [[https://www.silabs.com/Support%20Documents/TechnicalDocs/AN0046.pdf|USB Hardware Design Guide
AN0046 - Application Note]]
  * [[http://www.usb.org/developers/docs/hs_usb_pdg_r1_0.pdf| INTEL, High Speed USB Platform Design
Guidelines]]
  * Tira cálculos reales en cuatro y dos capas: http://www.electronic-products-design.com/geek-area/electronics/pcb-design/general-pcb-design/pcb-track-impedance
  * Presenta una técnica para bajar el ancho de pista: http://www.focusembedded.com/blog/high-speed-usb-in-a-two-layer-pcb/
===Cálculos con Kicad===