[SI-LIST] Re: SATA intra pair flipping
- From: steve weir <weirsi@xxxxxxxxxx>
- To: "Lenkisch, Andreas" <Andreas.Lenkisch@xxxxxxxxxxx>
- Date: Fri, 29 Jan 2010 01:31:06 -0800
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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