|
Message
From: "Amey Hegde" <amey@c...>
Date: Thu, 27 Dec 2001 17:42:07 +0530
Subject: RE: [usb] host controller transceiver?
the philips chip cannot be used for a host-side application
since it has no HS disconnect detection that is required by a host.
-amey
-----Original Message-----
From: owner-usb@o... [mailto:owner-usb@o...]On Behalf
Of Thierry LEROUX
Sent: Friday, December 28, 2001 4:23 PM
To: 'usb@o...'
Subject: RE: [usb] host controller transceiver?
Hello,
We made an extensive search of available PHY some months ago. As far as I
know the situation is as follows :
- Many makers are only providing these components as IP to be integrated in
larger "custom" silicon designs. Ie. there is no real chip available. This
is the case for inSilicon.
- Philips is providing one. Cheap and small package ...
The bad thing is that it is not compatible with the UTMI specification.
The second drawback is that the full speed tranceiver logic is not
implemented.
Only the high speed one is. This makes the FPGA more complicated (Ie. You
need to implement
the DPLL, bit-unstuffing, ... by yourself for full speed).
We got samples :-))
- Kawasaki LSI www.klsi.com is providing a nearly compliant UTMI chip.
It works fine and we got samples. We will go in production with it.
- TI is forecasting a tranceiver. I have no news from them so far.
- NEC also got one. Our local dealer got a response that we have too small
volumes
to be in a position to get those devices.
I do not know what is "small volumes" for them. I suppose that they are
not willing
to take care of small companies ...
- Lucent technologies used to have one. It vanishes in the recent cut-downs.
I hope this can help.
I have not heard of any chip which is able to handle the 3 speeds. However
and as far as I know, the Philips chip might be OK if it can handle the
controller requirements. Not sure ...
Rgds,
Thierry
-----Original Message-----
From: Amey Hegde [mailto:amey@c...]
Sent: jeudi 27 décembre 2001 04:51
To: usb@o...
Subject: RE: [usb] host controller transceiver?
but is your usb 2.0 host going to be implemented on FPGA alone? No ASIC
implementation? -amey
-----Original Message-----
From: owner-usb@o... [mailto:owner-usb@o...]On Behalf Of
Jecel Assumpcao Jr
Sent: Friday, December 28, 2001 6:08 AM
To: usb@o...
Subject: Re: [usb] host controller transceiver?
On Thursday 27 December 2001 13:12, Amey Hegde wrote:
> did u try going through the insilicon xcvr? It is supposed to be a
> host side xcvr too.
It is (http://www.insilicon.com/products/ProductPages/usb/usb2phy.shtml)
and so handles all three speeds. The problem is that it seems to be
available only as a macro to be included in a custom chip and I am looking
for a discrete transceiver to hook up to a FPGA.
-- Jecel
|
 |
Browse
