OSCON setting for 18F4520

[ScaleRobotics]

I have read through the datasheet and undertstand how the internal clock works and the various clock settings and so forth...BUT ... what I can't make sense of or remember is why my OSCON value is $70 ..is this REVERSED HEX 70 as per the required register setting ?
So binary would be 1110000 ?
And if I wanted 4 MHz the setting would be $60 or 0110000 not so ?

In the datasheet there is a bit to set internal clock as stable or not, ie 0 or 1 ..does anyone have a recommendation for that one ?

Hello Dennis,

$70 hex is 01110000 binary, and $60 hex is 01100000 binary, so yes I think you have got it. That would be 8mhz and 4mhz respectively.

The stability bit is a read only bit. It tells you when the oscillator is stable again, as you could change your oscillator frequency in software.

The PLL does work for internal oscillator. See section 2.6.4 of the data sheet.