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From: Marc Reinig<mreinig@p...>
Date: Wed Feb 11 04:23:22 CET 2004
Subject: [usb] about USB1.1 core on FPGA

> From: usb-bounces@o... [mailto:usb-bounces@o...]On
> Behalf Of tomko81@h...
> Sent: Tuesday, February 10, 2004 6:22 PM
> To: usb@o...
> Subject: [usb] about USB1.1 core on FPGA

> I would like to ask is it possible to implement PDIUSB11 on fpga? that
> mean do FPGA have the ability to do the part of PDIUSB11?

Not if you want reliable operation. USB buffers are impedance matched and
rise/fall time controlled

> Also, are the D+,D- 5V signals or 3.3 V signals ?

Neither, read the spec, ch. 7.

Marc Reinig
System Solutions

Reference	Author
[usb] about USB1.1 core on FPGA	Tomko81