<br><br><div class="gmail_quote">On Wed, May 30, 2012 at 3:30 AM, Henrik Nordström <span dir="ltr"><<a href="mailto:henrik@henriknordstrom.net" target="_blank">henrik@henriknordstrom.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
tis 2012-05-29 klockan 22:09 +0300 skrev Tsvetan Usunov - OLIMEX Ltd:<br>
<div class="im"><br>
> SY8008 is low cost step down DCDC<br>
> what is interesting here is that they do not use AXP209 which means<br>
> that they either abuse A10 specs, either the power sequencing is not<br>
> so critical for A10<br>
<br>
</div>I would not think the power sequencing is that critical as long as RESET<br>
is held at least until power is stable + 300us.<br>
<div class="im"><br>
> seeing that they spare the expensive TVS (one TVS cost as much as<br>
> SY8008 and there are 3 for the HDMI protection) looks like this<br>
> vendor loves to gamble and do not care too much for the long term<br>
> reliability of this product<br>
<br>
</div>Yes, not having protection on HDMI is gambling for sure.<br>
<br></blockquote><div>Aha, their engineer told me that they have the <span class="Apple-style-span" style="color:rgb(34,34,34);font-family:arial,sans-serif;line-height:16px;background-color:rgb(255,255,255)">video jitter problem that they can not</span></div>
<div>solve. Maybe it's related with this. </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Regards<br>
<span class="HOEnZb"><font color="#888888">Henrik<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
<br>
_______________________________________________<br>
arm-netbook mailing list <a href="mailto:arm-netbook@lists.phcomp.co.uk">arm-netbook@lists.phcomp.co.uk</a><br>
<a href="http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook" target="_blank">http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook</a><br>
Send large attachments to <a href="mailto:arm-netbook@files.phcomp.co.uk">arm-netbook@files.phcomp.co.uk</a><br>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><font face="'trebuchet ms', sans-serif">Keep simple, stay foolish.</font>
<div> </div><br>