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MCU POWER SUPPLY LINES AND CRYSTAL PLACEMENT RULES
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Feb 26.2020, 01:08:10
In order for the microprocessor / microcontroller, one of the most important components in electronic hardware design, to work properly under noise and magnetic field, ground and supply voltages must be connected very well.
The pcb I have drawn below can be an example of how the feeding capacities of an MCU unit should be connected.
The feeds and ground plane of the microcontroller must enter after the capacities, where the number of capacities is proportional to the feed input.
In the crystal connection, the ground connection of the capacities should be connected to the grou after they are combined in one place.
If the crystal in the photo is in khz order and if crystal in mhz order will be used, the paths between processor and crystal must be equal and symmetrical.
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