EMI (Electromagnetic Interference)Issues
Standard stipulates that an electronic device functions satisfactorily without interfering with other equipment within its environment. High frequency clock signals are one of the major sources of EMI. One of the ways to ensure EMI compliance is by the addition of a simple RC low-pass filter to the output of high frequency clock signals. The filter slows down the rise and fall time of the signal, thereby attenuating the harmonic contents of the signal.
