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  Topic: Set Operating Frequency for PIC18F4455
anthony

Replies: 4
Views: 8994

PostForum: General CCS C Discussion   Posted: Mon Mar 21, 2005 5:02 pm   Subject: Set Operating Frequency for PIC18F4455
Thanks. I have downloaded new version of PCH ver3.222, showing PLL fuses.

//////// Standard Header file for the PIC18F4455 device ////////////////
#device PIC18F4455
#nolist
//////// Program me ...
  Topic: Set Operating Frequency for PIC18F4455
anthony

Replies: 4
Views: 8994

PostForum: General CCS C Discussion   Posted: Fri Mar 18, 2005 12:14 pm   Subject: Set Operating Frequency for PIC18F4455
Thanks. I will try.

However, currently I do not have 4MHz clock. I have 20MHz crystal instead.

In that case, please help me for 20MHz crystal. Can I use H4 or HS? I have already tried both ...
  Topic: Set Operating Frequency for PIC18F4455
anthony

Replies: 4
Views: 8994

PostForum: General CCS C Discussion   Posted: Fri Mar 18, 2005 10:13 am   Subject: Set Operating Frequency for PIC18F4455
Target Frequencies:
(1) 48 MHz for CPU and Peripherals Clock
+ deriving from the 96 MHz PLL module
+ using Oscillator Postscaler: configure as divide-by-2

(2) 48MHz USB Clock
+ deriving from t ...
 
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