RK3288 Hardware Design Guide
Fig 3-3
The width of copper trace is recommended to be 4mils;
The signal fan from CPU pins should be in alignment and reasonable as shown in
below Fig:
Fig 3-4
Tips
：
3W Principle
：
Guarantee enough clearance to reduce trace to trace crosstalk. If the
clearance is not less than 3 times of trace width, it can reduce crosstalk between the
traces up to 70%.
20H Principle
：
Shrink power supply layer which can makes the electric field conduct
within the GND layer only. Take an H
（
the thickness of dielectric layer between power
and ground layer
）
as a unit, inside shrink 20H can suppress 70% of electrical filed
within the GND edge, while 98% for 100H.
Содержание RK32 Series
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