If you need a distributed clock then it is probably best to use an external clock and distributed it using a clock distribution IC.Hi guys,
I was wondering if there is an efficient way to access the internal oscillator of the AVR to be able to share it with other external IC's ?
The high frequency associated with the clock is very suceptable to the capacitance that can build up when it is connected to multiple devices. The risetime of the clock can be degraded significantly when subjected to the high capacitiance. The clock risetime specification is often very specific about the quality of the clock signal.what is the purpose of a distribution IC ? why do i need one ? why can't i just share the output from the external clock ?
This should be as simple as connecting the crystal or resonator across the OSC input terminals of the AVR along with the recommended amount of capacitance for the crystal being used. Be sure to observe the maximum clock frequency for the AVR device in question when selecting the crystal that you plan to use.how do i implement an external Crystal/Resonator clock ?
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by Jake Hertz