PIC18F4520 Sleep mode power consumption w Int & Ext Osc

[Darrel Taylor]

When a PIC goes into sleep mode, the primarary oscillator is shut-down (internal or external).
So it shouldn't matter what oscillator you are using.

And in sleep mode, a 4520 should only draw 10uA or less. (about 1/1000th of what you are reading).

Are you sure you didn't leave the WDT ON?
Any interrupts enabled?

There are several things you can turn off to get lower current in sleep mode, but none of them take 6 ma.
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[Bruce]

Clear OSCCON.7 so you aren't in power managed mode with peripherals still clocked during sleep.

[Darrel Taylor]

Oh! Very nice.

I did not see that.

Good 1 Bruce.
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[Gusse]

Thanks Bruce & Darrel, You are Awesome guys!

After clearing OSCCON.7 it goes again to low power mode sleep with int osc
0.85mA is system power consumption during PIC sleep. During sleep mode there are still several other parts, which consume power. Therefore value is so high.

BR,
-Gusse-