AR# 147: XC2000/XC3000: Can the crystal oscillator be used before configuration?
AR# 147
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XC2000/XC3000: Can the crystal oscillator be used before configuration?
Solution
The crystal oscillator circuit is not accessible before the start of configuration. It may be possible to use it before the end of configuration, as it is programmed by one of the very first bits in the configuration bitstream. This method is not recommended, as it is not tested or spec'd and could change.