Switch oscillators with PIC18F252

klausdejong · Joined: 15 Nov 2004 Posts: 18

Hello,

I'm working on a datalogger with the PIC18F252. For speed during datatransfer I need a 20 MHz crystal, for low power consumption when logging I want to use a 32kHz crystal.

I found the OSCSEN fuse to enable swithing and I studied the relevant parts of sections 2, 11 and 19 of the datasheet but I can't do the trick until now.

Is there somebody here who can help me a step further with this?

Thanks in advance,

Klaus

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Look in the CCS manual at the setup_oscillator() function.
Download the manual from this page:
http://www.ccsinfo.com/downloads.php

Look in the 18F252.H file, in the section titled:
"Constants used in setup_oscillator()"
It lists the constants that you can use with the setup_oscillator()
function with the 18F252.

klausdejong · Joined: 15 Nov 2004 Posts: 18

Thanks a lot, PCM programmer

It seems to work well now.

Klaus