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Message
From: kland@n...
Date: Thu, 14 Aug 2003 22:57:25 +0200
Subject: [usb] IP Core vs. USB chip...
We're working on an update to an existing USB design based on a
NetChip chip.
I want to consider using a licensed USB 2.0 IP Core (Asic.ws' OC),
but I'm unclear on the benefits of going this route.
I understand the benefits of much of the logic being easily updated by
downloading a new version to the FPGA etc.
But I don't see the financial benefits. The IP Cores I've read about all
require a PHY chip that takes up about as much board space and traces
as a dedicated USB chip. (it was posted that USB OC used an Agere
PHY which happens to have the exact same number of pins/balls as the
Agere USB chip)
Then there is the normal $15k-$20k startup license fee, which I
suppose the OC doesn't incur. You need a lot more unit volume than
we have if the $8-$10 difference between a PHY and full USB chip is
going to pay off.
I am wondering if there are any USB IP Cores that require only a USB
transceiver external to the FPGA? So basically only 4 pins and traces
would be required.
Thank you for any info.
Ken
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