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Clocking scheme for LAN8720A - Cortex M4

This is regarding a design choice involving LAN8720, specific to clocking schemes. We are interfacing an ARM cortex M4 (with inbuilt MAC) to the 8720 PHY via RMII in the REFCLKO configuration. In the ...
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Basic timings with an STM32

I am looking to make very basic timings on an STM32. For example, I would like to program my STM32 to output bytes on the UART for 1 minute. What clock/timer should I use? Looking through the ...
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Setting the HSE clock frequency of an STM32

I am programming an STM32 (manual here). Page 83 has a diagram indicating that the HSE Clock frequency is between 4 and 26 MHz. The paragraph on HSE clocks starts on page 84, but does not give any ...