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2camjohn said:I have a circuit which has two voltage regulators, one at 3.3V and one at 8V.
I am free to run my PIC16f628a (smt) of either of them.
Which option would be better? 3.3 or 8.0V??
Why?
2camjohn said:I cant see in chapter 17 where it says what the
Yes, it's easy to overclock them, but nobody can guarantee it will run fine and errorless :lol:Someone Electro said:I guy ran an PIC16F84 at 38Mhz and it ran fine whithout an single problem.
Jay.slovak said:Actually there is another way how to run PIC from 8V and 3,3V simultaneously (in case you don't need ground to be common).
Because 8-3.3=4.7V you can run the PIC with VDD connected to 8V and VSS connected to 3.3V and the PIC will run just fine.
eblc1388 said:In this situation, the clock(crystal) frequency is an important part of the choice.
With just over 3V you shouldn't run higher than 12MHz according to the data sheet.
So, using 8V with a 5V regulator can allow you to run it at max. 20MHz.
It's your choice, I reckon it is only an additional 78L05 regulator, the size of a transistor.
Unfortunatelly no, atleast not directly. But if you use a realy or optocoupler then yes...2camjohn said:Jay.slovak said:Actually there is another way how to run PIC from 8V and 3,3V simultaneously (in case you don't need ground to be common).
Because 8-3.3=4.7V you can run the PIC with VDD connected to 8V and VSS connected to 3.3V and the PIC will run just fine.
Great Idea!
However I am using the PIC to control devices which are running on the 8V and 3.3V power rails.
Would this be possible with the PIC wired up as you have described?
Thanks alot
John