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<johnwho>
Hi, my new board is failing the DQS Gate training procedure
<johnwho>
are there any ideas where to search for failures?
<johnwho>
how does the DQS training works on CHIP level?
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<hell__>
DQS sounds like memory initialization stuffs
<KotCzarny>
traces, traces everrywherre\
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<hell__>
if it's DDR3, some signals are routed as "fly-by" to all DRAM chips (think of an airplane that flies over the DRAM chips in succession)
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<hell__>
this makes the stub length minimal (from the PCB to the DRAM chip), which results in less problematic reflections. however, not all DRAM chips receive the DQS signal at the same time, so this needs to be compensated
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<fALSO>
tuxd3v, i havent played much with my sunxis
<fALSO>
tuxd3v, but a few days ago i compiler 5.5 for my rockpro64 with a ton of patches
<fALSO>
compiled
<tuxd3v>
you talked about hantro
<fALSO>
got hantro working, hw h264 encoding and decoding with ffmpeg
<fALSO>
pretty awesome
<tuxd3v>
hantro is what?
<tuxd3v>
a firewall like?
<fALSO>
hantro -> HW decoding of codecs
<fALSO>
like vdpau of nvidias and stuff
<tuxd3v>
ho, nice it come to mainline then :)
<fALSO>
yap, its experimental yet, but provanbly will be merged soon =)
<fALSO>
i also recommended a few friends to buy orange pis
<fALSO>
:)
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<fALSO>
yo tllim !
<fALSO>
was just talking aboyt my rockpro64 ;-)
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<tuxd3v>
fALSO, rockpro64 is a nice board, it has been riding at full throtle now for about 1.5 years yeah 24x7 :)
<fALSO>
i just do
<fALSO>
eix-sync && emerge -uv world
<fALSO>
;-DDDDDDDDD
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<tuxd3v>
it his in fact one of the first boards to come with 4GB usable Ram
<tuxd3v>
so it gives you a new world of possibilities indeed :)
<tuxd3v>
also because it has a fan conector, that works nice, I don't have the fear to catch fire on my apartment, since it maintains it always bellow 58°C
<tuxd3v>
now at 55°C ;)
<tuxd3v>
and that means pushing it up, to maximum always, without fears!
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<fALSO>
i have to buy that fan
<fALSO>
or a heatsink, but from what i saw, i would pay more from shipping that the actual product
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<tuxd3v>
A fan that works very nice for me is 40x40x10 mm
<tuxd3v>
in my case ripping of 24x7, I still haven't had the problem to change it for 1.5 years
<tuxd3v>
:)
<tuxd3v>
laos maintaining the cores busy, it means cpufreq will go to the roof, which means low latency :)
<tuxd3v>
mine is running big.LITLE 2.0Ghz.1.5Ghz
<tuxd3v>
all the time :)
<tuxd3v>
ondemand, but due to high processing, it stays at top always 24x7 :)
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<fALSO>
nice, gonna search for a fan/heatsink of that size
<fALSO>
thanks tuxd3v
<tuxd3v>
you welcome,
<tuxd3v>
I tested already several fans.. I also tested a 40x40x20 mm
<tuxd3v>
20 mm tall, was at the beginning something that I was asking for... but it doesn't proved right..
<tuxd3v>
too much vibration in a 20 mm tal fan
<tuxd3v>
its amazing..
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<tuxd3v>
a 10mm tal fan is the best option, it does the job well done, with very litle to no vibration ;)
<tuxd3v>
remember CPUs are BGS socket like, if what you put above them are vibrating too much, it would mean lower life cicly, becasue BGAs tend to break then conections with the board
<tuxd3v>
since that conection is made with a ball grid array of stainless solder..
<tuxd3v>
so the best in 40x40x10 mm :)
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