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PIC18LF6680 3.3V ECAN performance

 
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alexz



Joined: 17 Sep 2004
Posts: 133
Location: UK

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PIC18LF6680 3.3V ECAN performance
PostPosted: Thu Jun 08, 2006 3:10 am     Reply with quote
Can the PIC18LF6680 achieve 1M Baud CAN rate when supplyed from 3.3V? Oscillator 20MHz
Has anybody got working CAN using a 3.3V PIC ?

I have got my software configured for 1Mbps and it works fine with the PIC18F4680 when supplied from 5V, but not with the PIC18LF6680 which is supplied from 3.3V ( the same code configurations), where I can achieve maximum of 125K baud. If I configure the device to a higher baud rate, the data gets crazy and the baud rate becomes unstable and upto 80Kbps.

Is there a problem with this particular PIC family or with 3.3V supply?
Accordingly to the data sheet the maximum clock frequency I can have is 25MHz when supplied from 3.3V, but I am using just 20MHz.
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Alex
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