It appears from [0] that the chip of choice is the STM32F045RGT (datasheet [1]). This is from the Cortex M4f series, which includes such wonderful things as a

It appears from [0] that the chip of choice is the STM32F045RGT (datasheet [1]). This is from the Cortex M4f series, which includes such wonderful things as a hardware floating-point unit. That is wonderful news, although, this board appears to have no external memory, so it would be limited to 128kB. [0] https://raw.githubusercontent.com/micropython/pyboard/master/schem.png https://raw.githubusercontent.com/micropython/pyboard/master... [1] http://www.alldatasheet.com/datasheet-pdf/pdf/510587/STMICROELECTRONICS/STM32F405RG.html http://www.alldatasheet.com/datasheet-pdf/pdf/510587/STMICRO...