<div dir="ltr">Update - it is written at line 1 at page 1 of the datasheet "ARM-based 32-bit MCU, up to 128 KB Flash, <b>crystal-less</b> USB <br> FS 2.0, CAN, 12 timers, ADC, DAC & comm. interfaces, 2.0 - 3.6 V" - so it should do clock recovery from USB data stream.<div>
<br></div><div>Another note (if you go this way) - this chip has two I2C controllers - so you could "spread" the sensors on both of them to get better throughput. Just take care to estimate the data rate of each one of them so make a good balance.</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-08-07 17:42 GMT+03:00 krasi gichev <span dir="ltr"><<a href="mailto:krasimirr@gmail.com" target="_blank">krasimirr@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Wow, this is 100 pins ... sure it has everything you need (and a lot of things that you don't need). But is 14mm square, I hope you have enough board space.<div>Check this link for reference - you can use design files of this eval board for quick start: <a href="http://www.st.com/web/en/catalog/tools/FM116/SC959/SS1532/PF259717" target="_blank">http://www.st.com/web/en/catalog/tools/FM116/SC959/SS1532/PF259717</a></div>
<div><br></div><div>There is a claim in the datasheet: "Internal 48 MHz oscillator with automatic trimming based on ext. synchronization" - not sure but I suspect that this would be a good option if used on USB - no need for clock crystal for the STM32.</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-08-07 17:29 GMT+03:00 Miguel Garcia <span dir="ltr"><<a href="mailto:gacuest@gmail.com" target="_blank">gacuest@gmail.com</a>></span>:<div><div class="h5">
<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
2014-08-07 16:23 GMT+02:00 krasi gichev <<a href="mailto:krasimirr@gmail.com" target="_blank">krasimirr@gmail.com</a>>:<br>
<div>> Yep, 071 is good if host connection is either I2C or SPI. There are 2 I2C<br>
> controllers so it can run as gateway.<br>
> But for USB there is STM32F072CBT6 - at Digikey it is priced at 2.37USD for<br>
> 1000pcs -<br>
> <a href="http://www.digikey.com/product-detail/en/STM32F072CBT6/497-14645-ND/4815292" target="_blank">http://www.digikey.com/product-detail/en/STM32F072CBT6/497-14645-ND/4815292</a>.<br>
> This one is in 48 pin. If more pins are needed, just switch to:<br>
> STM32F072RBT6 -<br>
> <a href="http://www.st.com/web/catalog/mmc/FM141/SC1169/SS1574/LN1823/PF259605" target="_blank">http://www.st.com/web/catalog/mmc/FM141/SC1169/SS1574/LN1823/PF259605</a><br>
<br>
</div>And this: <a href="http://www.digikey.com/product-search/en?KeyWords=STM32F072VBT6" target="_blank">http://www.digikey.com/product-search/en?KeyWords=STM32F072VBT6</a> ??<br>
<div><div><br>
Thanks.<br>
<br>
_______________________________________________<br>
arm-netbook mailing list <a href="mailto:arm-netbook@lists.phcomp.co.uk" target="_blank">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" target="_blank">arm-netbook@files.phcomp.co.uk</a></div></div></blockquote></div></div></div><br></div>
</blockquote></div><br></div>