difference between HS and EC/ECIO oscillator mode

[starfire151]

In looking a the datasheet for the PIC18LF2525, the description for the HS and EC/ECIO modes in the Oscillator section, what is the effective difference on operation of the PIC for these two modes if an external oscillator is supplied to the clock inout on pin 9? It appears the PIC runs the same in either case. If I supply a 20MHz input to the clock pin at pin 9, will the PIC run the same if the oscillator is selected as #fuses HS or #fuses EC (or #fuses ECIO)?

I'm running at 3.3VDC. Does that make a difference on overall oscillator choice?

Thanks.

[Ttelmah]

Basically, it'll run the same, but with HS selected, it'll draw more power (because the internal amplifier is enabled), and there will be a clock output on pin 10, while with ECIO, this pin will be available for use as a normal IO. In EC mode, the output will be FOSC/4, and consumption will be between the values involved for HS, and ECIO.

Best Wishes