There are a lot of features hiding in today’s microcontrollers - even the STM32F103 series includes some very nice peripherals:
2 to 3 A-to-D converters, sampling up to a million times per second on the larger devices: dual D-to-A converters, with 3 µS rise times 2 to 3 hardware SPI interfaces, supporting up to 18 Mbit/s 2 to 5 universal serial ports, some of them supporting up to 4.5 Mbis/s That’s a lot of data, once you start using these peripherals.
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