[SOLVED] [PIC18F4520] Power Supply issue

[flote21]

Hello,

Reading the datasheet, it says that the recommended power supply is 5v. However this PIC is going to be connected to a 3v3 FPGA bank, and I am wondering if there is any way to configure the I/O pins to have Vout(max)=3v3 powering the chip with 5v. Is it possible?

Thanks!

 

[malli_1729]

you power the PIC with 3.3V rail.

 

[milan.rajik]

PIC can be powered with 3.3V or a voltage dividers can be used on output pins of PIC which connect to FPGA or 3.3V devices or you cam use PIC18LF4520 which is a 3.3V device.

 

[flote21]

Yes but the performance of the chip is lower and sometime is getting crazy...

you power the PIC with 3.3V rail.

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Which is the difference btwn PIC18F4520 and PIC18LF4520? In theory both accept the same power range...

PIC can be powered with 3.3V or a voltage dividers can be used on output pins of PIC which connect to FPGA or 3.3V devices or you cam use PIC18LF4520 which is a 3.3V device.

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Ok i get it. 18LF accept from 2-5v5 and 18F from 4v5-5v5

thanks