when reading http://microchip.wikidot.com/8bit:ec
The EC mode has three power modes to select from. The EC mode is selected in a configuration register. The three modes include: ECH - High-power mode, 4Mhz - 32Mhz ECM - Medium-power mode, 0.5 Mhz - 4 Mhz ECL - Low-power mode, under 0.5 Mhz
I'm confused as this is not a crystal oscillator that needs an amplifier to form an oscillating circuit. What is the "power" needed for if the clock is considered as:
externally generated logic level signal and that signal used as the system clock source
Are the power options needed only when the OSC2 pin is used as an output? Maybe amplifying the signal to be re transmitted to other devices? Or is it necessary for amplifying the signal to drive the internal logic of the microcontroller?
Thanks a lot