--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Thu, Jan 12, 2017 at 8:50 AM, Tor, the Marqueteur <[email protected]> wrote: > EOMA50 would be better for it, but something like a digital audio player > might like an OS tailored to understand its buttons, and the card with > that OS installed on it might be a bit screwy to use for a laptop (or > phone). Nevertheless, IIUC, as long as nothing will blow up, and you get > some semblance of usable output, it's still OK by the standard. pretty much.... yyeah. examples include the passthrough card that i quickly designed a couple of weeks ago: i connected an STM32F072's SPI pins to the EOMA68 SDMMC, because it's _barely_ compliant... if you want 4-pin you can do bit-banging.... which willl be horribly slow on a 72mhz Cortex M0 especially given that the STM32F072's USB bus is USB 1.1 (11mbit/sec) but that's not a problem as far as the *standard* is concerned. other examples include the (failed, sadly) IC1t which used the opencores.org vga controller (yes, really!) and the bandwidth was so limited on the framebuffer "reader" (wishbone bus, 16-bit-wide) that if you wanted 1366x768 you had to do it as monochrome (!)... but, again, that's *not* a problem as far as the *standard* is concerned. in the strictest sense, it can achieve 1366x768 output... just with only black/white. another is the jz4775 which has 2 USB interfaces - one of them is USB 1.1: again, not a problem: it'll work... just. so there's lots of flexibility: any one SoC needs to comply with the absolute bare minimum, so that if people *really want* to pay only $11 for a Card they can, and if they want better they can pay $150 for an RK3288 with 4GB RAM and 32GB ultra-fast eMMC. l. _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
