3
votes
Accepted
STM32H7 not utilizing the 480MHz PLL clock
Your expectation how software runs on an MCU is wrong.
If MCO is configured to have SYSCLK divided by 4 and you measure 120 MHz, then you have 480 MHz SYSCLK for sure.
Another way to demonstrate this ...
- 114k
3
votes
LVPECL output circuit explanation
A basic simulation of the circuit can be set up right in the CircuitLab circuit editor available in both the question and answer editors.
simulate this circuit – Schematic created using ...
3
votes
Can slower switching edges worsen the EMI behavior?
At least one leg of a crystal is usually rather sinusoidal - 'scope one and see. Their traces are usually short and right next to chip so these generally don't add much to radiated EMI. Stick a ...
- 14.3k
2
votes
STM32H7 not utilizing the 480MHz PLL clock
Your code is definitely not executing the way you think it is.
If you compile your code with the optimizations enabled your code will be optimized to the single return instruction.
...
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1
vote
How can I convert a stim signal from analog to digital?
Do you want something like this, for example ...
You should swap your inputs.
Or this one ...
Or this one ...
- 9,984
1
vote
Can slower switching edges worsen the EMI behavior?
If the EMI system is such that the emissions are directly proportional to the level from the oscillator, then a strict reduction in levels at the oscillator will reduce the emissions proportionally.
...
- 13.9k
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