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Message
From: Jecel Assumpcao Jr <jecel@m...>
Date: Thu, 18 Sep 2003 22:17:26 -0300
Subject: [usb] transceiver
I made a design with the Philips PDIUSBP11A trasceiver and it turned out
to be the most complicated part to obtain for manufacturing in small
quantities.
In comp.arch.fpga this project was mentioned that used only three
resistors and three FPGA pins to do a device interface.
http://member.nifty.ne.jp/fpga/freeip/usb/index.shtml
Since I am interested in a host interface, it seems to me that two
resistors and pins would be enough. I noticed that Xess tried something
like this in the first version of their XSV board (two USB interface
with four pins) and then used a PDIUSBP11A in the next version (which
needs seven pins for a single USB interface), so it obviously isn't as
easy as it seems.
Does anybody have any experience with using the FPGA itself as a
transceiver?
-- Jecel
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