Being at a lack of a schematic that I could look through, I was wondering if it will be possible to access the STM32F103’s i2s(not i2c) bus to attach a high quality DAC or ADC?
The same goes for the SDIO feature that some of the variants of the STM32F103 seem to have. If the the SDIO were accessible, it would be possible to attach an SD card in 4 bit mode to get some really nice throughput from an sd card (for example to serve files such as jquery sources if in a closed environment where it wouldn’t be feasible to pull jquery etc *.js from another source. )
Aww yes, you guys are of course right, sorry. I was looking at the high-density part feature lists, while the STM32F103CBT6 is in fact only a medium-density device. Features of the medium-density parts
according to the datasheet:
3 × USARTs
3 × 16-bit timers
2 × SPIs, 2 × I2Cs, USB, CAN, 1 × PWM timer
2 × ADCs