On Fri, Aug 8, 2014 at 1:04 PM, Miguel Garcia gacuest@gmail.com wrote:
2014-08-08 10:33 GMT+02:00 Daniel Iglesias daniel.iglesias@gmail.com:
Is there a smaller one in the same family we could use? Such as the STM32F072'C' or 'R', which have 37 and 51 GPIOs respectively and nearly the same number of ADCs as the bigger 'V' variant. I suppose it'd make PCB design/routing easier, since the number of pins and the dimensions of the IC roughly double between the 'C' and the non-BGA 'V' variants. I don't know if there are any disadvantages to using the smaller ones though.
And they are cheaper.
STM32F072CB: http://www.stmicroelectronics.com.cn/web/catalog/mmc/FM141/SC1169/SS1574/LN1...
STM32F072RB: http://www.stmicroelectronics.com.cn/web/catalog/mmc/FM141/SC1169/SS1574/LN1...
A stupid question. STM32F072 has USB 2.0 connectivity. Does connectivity can also be USB 1.1?
very good point. and it's not a stupid question at all, because if you look e.g. at the OMAP35xx series they *only* support full-speed (480mbit/sec) USB, they *do not* support slower speeds so you always had to connect a full-speed USB Hub to them if you wanted to connect even a single USB 1.1 device.
I say this because the second USB of EOMA may be USB 1.1 and will not always be USB 2.0.
well, you could just make sure that you go through the hub... which you are planning anyway, then it is the hub's problem to do the buffering and packet forwarding.
so i *believe* it's fine...
you're planning to pass the "main" USB (the one that can be up to USB 3.0) directly through to a USB Host connector aren't you.
l.