Enables the Crystal Oscillator circuit so that a clock signal can be input to XIN, or so that XIN and XOUT can function together as a feedback oscillator. The XINPUT and XTALx settings of the _CLKMODE declaration configure OSCENA this way. The OSCMx bits select the operating mode of the Crystal Oscillator circuit. Note that no external resistors or capacitors are required for crystals and resonators. Allow a crystal or resonator 10 ms to stabilize before switching to a Crystal Oscillator or Clock PLL output via the CLKSELx bits. When enabling the Crystal Oscillator circuit, the Clock PLL may be enabled at the same time so that they can share the stabilization period.
|