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PIC not working with 20 MHz Crystal

 
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musti463



Joined: 19 Sep 2013
Posts: 66

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PIC not working with 20 MHz Crystal
PostPosted: Sun Dec 28, 2014 7:54 am     Reply with quote
Hello,

I am still trying RS485 communication and i need to change 4 MHz crystal to 20 MHz. System working with 4MHz crystal but when i change with 20 MHz PIC not working. There isn't any image on GLCD. What is the problem?
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M.Emir SADE
temtronic



Joined: 01 Jul 2010
Posts: 9243
Location: Greensville,Ontario

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PostPosted: Sun Dec 28, 2014 8:34 am     Reply with quote
post a small program that fails. Usually you start with the simple 1Hz LED program (just setup PIC, and have main() 'toggle' an I/O pin connected to an LED. show us your code and we can help...


jay
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