Posted on July 23, 2016 at 02:50Does STM32F103RB use switched capacitor ADC circuit which produces some noise in the process and requiring source impedance to be 'not too high' or else accuracy will degrade? The signal is single channel and no MUX...
Posted on July 23, 2016 at 02:44What configuration parameters (clock freq, sampling clock count, etc.) can I tune in order to minimize ADC reading noise when sensing a relatively low speed signal? I am currently getting about 10 to 20 LSB differe...
Posted on July 22, 2016 at 22:58What ppm accuracy is needed for STM32F103RB as full-speed (12Mbits/s) device? Is RC HSI (a few percent error) not accurate enough for STM32F103RB as USB device? For STM32F401RE, do host or OTG modes require higher acc...
Posted on July 22, 2016 at 19:23Does CubeMX supports the above? I tried and CubeMX failed on USB selection with error, ''USB device not available. Active only when USB OTG FS IP is configure in Device mode''. There was a /public/STe2ecommunities/mc...
Posted on July 31, 2016 at 18:49Hi forumstm32, Many thanks for your reply. After switching to HSE, CubeMX generates USB code. I believe HSI frequency tolerance is not enough for USB. John
Posted on July 22, 2016 at 22:22Hi Hannibal, Thanks for advises. It was great help in narrowing the document search which yields the result below. The PA0 SYS_WKUP 'special pin' allow waking up from 'deeper' standby mode (2uA for STM32F103RB). The o...
