[SI-LIST] Re: Fw: Re: SATA intra pair flipping
- From: "Lenkisch, Andreas" <Andreas.Lenkisch@xxxxxxxxxxx>
- To: Scott McMorrow <scott@xxxxxxxxxxxxx>, "Joseph.Schachner@xxxxxxxxxx" <Joseph.Schachner@xxxxxxxxxx>
- Date: Sat, 30 Jan 2010 22:10:36 -0600
... but it helps, if a design error has ben occoured....
I would thank to all for valuable comments.
I cound't find in the SATA spec. a polarity flipping requirement, therefor I
have asked the community (if it may be common pactise..., but it seems not). I
will ask finally some specialists, otherwise the proposal from Steve, to rework
a cable (already done) will cause the least pain...
Thanks again
regards
Andreas
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Scott McMorrow
Sent: Freitag, 29. Januar 2010 16:49
To: Joseph.Schachner@xxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Fw: Re: SATA intra pair flipping
Joe
PCI Express polarity reversal was not designed to meet the need of PCB design
errors, it was designed to facilitate package pin assignment, routing, and
de-skew simplification.
Joseph.Schachner@xxxxxxxxxx wrote:
> You're correct that SATA does not support polarity flip (at least, the
> spec doesn't require it). But there is at least one counterexample to
> the logic that there isn't "perceived market need to handle PCB design
> errors" - PCI Express does support polarity reversal. It's one of
> the "services" of the Physical Layer, listed in section 1.5.4.3 (of
> PCI EXPRESS BASE SPECIFICATION, REV. 2.1).
>
> --- Joe S.
>
>
>
> From: steve weir <weirsi@xxxxxxxxxx>
>
> To: "Lenkisch, Andreas" <Andreas.Lenkisch@xxxxxxxxxxx>
>
> Cc: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
>
> Date: 01/29/2010 04:32 AM
>
> Subject: [SI-LIST] Re: SATA intra pair flipping
>
> Sent by: si-list-bounce@xxxxxxxxxxxxx
>
>
>
>
>
>
> I think you are out of luck. SATA isn't subject to human installers
> punching down connections backwards like Ethernet is. I doubt there
> is any perceived market need to handle PCB design errors. I am pretty
> sure that polarity sensing / flipping is not available on
> SiliconImage parts. I doubt it is available on anyone else's.
>
> Steve.
> Lenkisch, Andreas wrote:
>
>> does anyone know if state of the art SAT controller can flip +/- pins
>> of
>>
> the RX pair? (if +/- flipped erroneously along the path)
>
>> thanks in advance
>> Andreas
>>
>> -----Original Message-----
>> From: si-list-bounce@xxxxxxxxxxxxx
>> [mailto:si-list-bounce@xxxxxxxxxxxxx]
>>
> On Behalf Of Rama Mohan Reddy Boreddy
>
>> Sent: Freitag, 29. Januar 2010 05:12
>> To: si-list@xxxxxxxxxxxxx
>> Subject: [SI-LIST] Silver ink usage in High Speed Flex Designs
>>
>> Hi Experts,
>> In one of our earlier projects, we have used High Speed Flex PCBs.
>> The
>>
> stackup of the 3 layer Flex is like this
>
>> Solder Mask
>> Silver Ink
>> FR4
>> Layer 1 ( HDMI, SATA and USB)
>> FR4
>> GND
>> FR4
>> Layer2 (HDMI, SATA )
>> FR4
>> Silver Ink
>> Solder mask
>>
>> I haven't included adhesive for the clarity. Please share your
>> thoughts
>>
>> a) Does the Silver ink really required? Silver ink used to provide
>>
> shielding for top and bottom signal layer. But when i checked the
>
>> appliation notes, Silver Ink doesn't provide proper shielding at
>>
> speed more than 1 GHz.
>
>> Rama
>>
>>
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>
> --
> Steve Weir
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--
Scott McMorrow
Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
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Gesch?ftsf?hrer: Steven S. Cotariu, Walter Kritikos, Daniel Stirpe
Important Notice
The information contained in this message is confidential and is intended for
the addressee only.
The unauthorised use, disclosure, copying or alteration of this message is
prohibited and may be unlawful. If you received this message in error or there
are any problems please notify the originator immediately and contact
postmaster@xxxxxxxxxxxxxxxxxxxxxx This mail and any attachments have been
scanned for viruses prior to leaving Pentair's network. Pentair will not be
liable for direct, special, indirect or consequential damages arising from
alteration of the contents of this message by a third party or as a result of
any virus being passed on. All personal views stated in this message are my own
and may not represent the position of, nor is this message binding upon,
Pentair Inc. or any of its subsidiaries.
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