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* IO-pin, with a decoupling capacitor, can filter out a lot of external interference.
* High-frequency signal lines to minimize the length of wiring, especially the clock signal, as a high frequency, the longer wiring issued by the electromagnetic interference the more strongly. At the same time, but also to minimize the length of other signal lines.
* Make full use of surface-mount chip; this can not only shorten the length of circuit, also will not happen because of vibration, shock and the loosening of the situation. |
