3v power-up problem with 16LF628

Grailman · Joined: 01 Aug 2005 Posts: 2

I have issue with a 16LF628 PIC that will not power up using a 3.1 v suppply. It works fine if I use a 5v supply but when I switch to a 3.1v supply, it just does not power-up. The fuses I set are:

#fuses INTRC_IO, NOLVP, NOWDT, MCLR, BROWNOUT, PUT

where the MCLR pin had a 10K to Vdd and a .1uF cap to gnd. I also tried it without the cap and using the NOMCLR fuse. Neither one worked with the 3.1v supply. If anyone has some pointers about how I should debug this I would sure appreciate some pointers.

Thanks,
Grailman

asmallri · Joined: 12 Aug 2004 Posts: 1634 Location: Perth, Australia

You want nobrownout.
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Regards, Andrew

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Guest · Posted: Tue Aug 30, 2005 11:08 am

So is there no way to use brown out with a lower voltage?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Guest · Posted: Wed Aug 31, 2005 5:49 am

Thanks for the great input. This should help out quite a bit!