Trace length from FPGA to USB PHY

Mar 08, 2005 1 Replies

Hello guys, I wanted to know far i can keep by USB PHY from USB core (inside the fpga) so that i am within the USB standard???? how do i calculate the maximum trace length from fpga to Usb PHY.



Thanks in advance Regards Praveen


There are no USB specs on the distance between a PHY and its controller. You need to meet the specs of the PHY manufacturer. There are specs that relate to the traces from the PHY to the USB connector.

Marc Reinig UCO, Lick Observatory Laboratory for Adaptive Optics

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