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| 00:34.24 | projectgus | slapin: fwiw quicklib can do PQFP http://kicad.rohrbacher.net/quicklib.php |
| 00:34.43 | projectgus | should get you the schematic library pretty quickly at least, footprint you may have to diy |
| 00:35.08 | projectgus | realises he's probably 40 minutes too late with that link |
| 00:38.41 | 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 |
| 00:39.22 | lkcl | and b it doesn't have HDMI, Ethernet, SATA or ... well... anything half-way decent that made the a10 massively attractive. |
| 00:40.09 | 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! |
| 00:40.37 | lkcl | so you end up with something that's *more* expensive than an A10.... and you still have the shit 16-bit RAM interface! |
| 00:40.39 | lkcl | ergo, it's shit! |
| 00:40.58 | rz2k | doesnt 16bit interface only limit max ram available? |
| 00:41.17 | lkcl | rz2k: no, it doesn't - it limits the speed at which you can *access* the ram. |
| 00:41.41 | lkcl | if you limit the address bus (this is the data bus that's 16-bit wide) *then* you limit the max available RAM |
| 00:42.15 | rz2k | thought it only had address bus limit :p |
| 00:42.49 | 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!" |
| 00:43.07 | rz2k | also there is a problem with routing, for some reason there is no ball-to-pin data for ddr3 signals |
| 00:43.21 | lkcl | and if you're not expecting to do... ouch, that doesn't help either |
| 00:43.36 | rz2k | and you need to place that resistors, usually they are embedded elsewhere |
| 00:44.37 | lkcl | i don't fully understand DDR2/3 signalling yet, which is why i'm asking these soc companies for EVB schematics |
| 00:44.46 | lkcl | leeeave it aloooone :) |
| 00:46.20 | projectgus | are there any other SoCs that come in non-BGA packaging like the a13? |
| 00:46.38 | rz2k | imx-something was in qfp |
| 00:46.43 | rz2k | but it was long ago |
| 01:04.49 | Marex | slapin: no |
| 01:19.30 | lkcl | projectgus: the jz4740 which was in the skytone alpha 400, and is used in the ben nanonote |
| 01:20.04 | lkcl | i think it's 176-pin QFP. amazing. |
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| 03:45.21 | 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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| 09:00.21 | hno | slapin, yes, still here. |
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| 09:53.49 | 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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| 10:23.40 | L84Supper | CaCtus491: it would not be small if it has a bunch of connectors hanging off of it |
| 10:25.40 | 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 |
| 10:26.16 | CaCtus491 | Looking for something that takes care of the processor, RAM, and storage |
| 10:27.13 | L84Supper | search for COM and ARM |
| 10:28.48 | L84Supper | http://www.bddgroupllc.com/ said they have an a10 COM, but it doesn't appear to be shipping yet |
| 10:29.11 | L84Supper | http://www.bddgroupllc.com/A-Series_CoM.php |
| 10:30.30 | CaCtus491 | hmm, that A10 module looks good |
| 10:33.01 | CaCtus491 | Thanks for that. |
| 10:33.11 | CaCtus491 | I shall continue to look around and see what else I can find. |
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| 15:02.50 | 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 |
| 15:02.50 | 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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| 15:52.09 | penguin42 | wonders wth Samsung make some of their S4's with a Qualcomm chip and some with Exynos |
| 15:56.04 | WarheadsSE | LTE maturation |
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| 16:18.03 | 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 |
| 16:24.49 | 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. |
| 16:25.08 | lkcl | but 308 pins @ 0.4mm pitch is still a monster. |
| 16:25.37 | lkcl | that's... yeah 30.8mm just for the pins, with a little more for overlap at the edges, so about 34mm. |
| 16:26.04 | 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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| 21:14.11 | projectgus | lkcl: nod. I see. |
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