lkcl changed the topic of #arm-netbook to: arm-netbook: Don't ask to ask. Just ask! - EOMA68 spec http://bit.ly/ZHqfxA - ML arm-netbook@lists.phcomp.co.uk - Logs http://bit.ly/XELKJq or http://bit.ly/15OCYPD - For Allwinner/sunxi discussions prefer #linux-sunxi - iMX6 Card http://bit.ly/XAUGCD - Flying Squirrel http://bit.ly/WgOYaR - Allwinner A10/A20 Card http://bit.ly/zBLAbY - http://rhombus-tech.net
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<projectgus> slapin: fwiw quicklib can do PQFP http://kicad.rohrbacher.net/quicklib.php
<projectgus> should get you the schematic library pretty quickly at least, footprint you may have to diy
* projectgus realises he's probably 40 minutes too late with that link
<lkcl> slapin: i don't "hate" the a13 - it's quite simple: it only has a 16-bit RAM interface, therefore it's automatically going to be absolutely dreadful performance
<lkcl> and b it doesn't have HDMI, Ethernet, SATA or ... well... anything half-way decent that made the a10 massively attractive.
<lkcl> and if you have to add the ICs in to get HDMI, Ethernet and SATA back in, it's about $5 worth of components, which completely defeats the purpose of being lower-cost!
<lkcl> so you end up with something that's *more* expensive than an A10.... and you still have the shit 16-bit RAM interface!
<lkcl> ergo, it's shit!
<rz2k> doesnt 16bit interface only limit max ram available?
<lkcl> rz2k: no, it doesn't - it limits the speed at which you can *access* the ram.
<lkcl> if you limit the address bus (this is the data bus that's 16-bit wide) *then* you limit the max available RAM
<rz2k> thought it only had address bus limit :p
<lkcl> but when everyone else is going "hmm... we really should be thinking about doing a 64-bit-wide memory interface", a number of companies are going "hey let's make a small cheapo processor to saturate the tablet market, let's make it shit by halving the data rate of the RAM interface, yaaay!"
<rz2k> also there is a problem with routing, for some reason there is no ball-to-pin data for ddr3 signals
<lkcl> and if you're not expecting to do... ouch, that doesn't help either
<rz2k> and you need to place that resistors, usually they are embedded elsewhere
<lkcl> i don't fully understand DDR2/3 signalling yet, which is why i'm asking these soc companies for EVB schematics
<lkcl> leeeave it aloooone :)
<projectgus> are there any other SoCs that come in non-BGA packaging like the a13?
<rz2k> imx-something was in qfp
<rz2k> but it was long ago
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<Marex> slapin: no
<lkcl> projectgus: the jz4740 which was in the skytone alpha 400, and is used in the ben nanonote
<lkcl> i think it's 176-pin QFP. amazing.
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<projectgus> lkcl: ah, neat. it's a shame all the successors are BGA, but I guess modern devices means high pin counts
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<hno> slapin, yes, still here.
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<CaCtus491> Hi all, is anyone aware of a SoM module supplier that offers some thing like the modules from Variscite? Compact module, but without a bunch of connectors hanging off the module. Also something that is available in industrial temp ranges, and 'cost effective' :-)
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<L84Supper> CaCtus491: it would not be small if it has a bunch of connectors hanging off of it
<CaCtus491> L84Supper: Exactly, that's why I don't want a bunch of connectors hanging off it :) It's a headless product, and due to casing, etc, the Ethernet port is to go on a carrier board along with the power supply and other custom logic
<CaCtus491> Looking for something that takes care of the processor, RAM, and storage
<L84Supper> search for COM and ARM
<L84Supper> http://www.bddgroupllc.com/ said they have an a10 COM, but it doesn't appear to be shipping yet
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<CaCtus491> hmm, that A10 module looks good
<CaCtus491> Thanks for that.
<CaCtus491> I shall continue to look around and see what else I can find.
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<SPG> lkcl master 81b64ee rhombus jz4760/ news.html news/jz4760_pcb1.png * jz4760 news * http://git.hands.com/?p=rhombus.git;a=commitdiff;h=81b64ee
<SPG> lkcl master 4c07954 rhombus * Merge branch 'master' of ssh://git.hands.com/rhombus * http://git.hands.com/?p=rhombus.git;a=commitdiff;h=4c07954
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* penguin42 wonders wth Samsung make some of their S4's with a Qualcomm chip and some with Exynos
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<WarheadsSE> LTE maturation
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<SPG> lkcl master 7da69f2 rhombus jz4760/ news.html news/act9000.png news/jz4760_pcb1.png * act9000 PMIC * http://git.hands.com/?p=rhombus.git;a=commitdiff;h=7da69f2
<lkcl> projectgus: you can get away with a 308-pin QFP: it's just that it's 32mm on a side. i designed a pinout which includes DDR3 32-bit [150 of the 308 pins] and even packs in PCIe 4x (multiplexed onto one of the two LCD interfaces, also multiplexed with dual LVDS) - so it *can* be done.
<lkcl> but 308 pins @ 0.4mm pitch is still a monster.
<lkcl> that's... yeah 30.8mm just for the pins, with a little more for overlap at the edges, so about 34mm.
<lkcl> in other words, BIG by today's embedded standards, but good on thermal dissipation, and magic on price and yield.
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<projectgus> lkcl: nod. I see.
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