I have wrote a programm for 16f84a and 16f628a with crystal 4MHZ.
If i change the crystal to 20Mhz and define 4 to define 20 , will that works;
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I have wrote a programm for 16f84a and 16f628a with crystal 4MHZ.
If i change the crystal to 20Mhz and define 4 to define 20 , will that works;
Hi, Savnik
Depends on what your program is supposed to do and how it is written ... my Crystal ball is out for repairs !!!
Timing instructions ( PULSIN, RCTIME,COUNT,FREQUOUT, etc ...) will especially be modified ... as stated in the PbP Manual ... if you've spread some assembler, or use interrupts, may be some registers preloadings ( TMRs i.e.) will have to be modified ...
No more details available without knowing what you've written ...
Alain
If i want to turn on and off one led;Quote:
Originally Posted by Acetronics
If you JUST want to turn the led ON or OFF ... no mod. involved.Quote:
Originally Posted by savnik
Note with the DEFINE OSC 20 ... PAUSE and PAUSEUS will still give the "written" time.
Alain
I don't want to change the code.I ask because i have one pic16f84a-04 and one pic16f628aQuote:
Originally Posted by Acetronics
For 20Mhz, you'll also need to change the oscillator config to HS.
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I know , but the pic16f84a-04 and pic16f628a work with crystal 20 Mhz;Quote:
Originally Posted by Darrel Taylor
please go thro the datasheet Ds35007B in respect of PIC16F84A-4/20-- figures 9-1 and 9-2 and relevent comments. it is however possible as per the datasheet but voltage restrictions apply , i beleive.Quote:
Originally Posted by savnik
for PIC16F628A, it is possible to have any crystal.
In both cases appropriate config commet to be moddedas you know already
Thank you.Quote:
Originally Posted by mvs_sarma