Strangw results when using PWM command

[mister_e]

That's really strange... it's working here using the first code of my previous message.

Ramp-up, ramp-down in an endless loop... mmm.

I suspect a hardware problem but damn it's not a really complicated hardware, i removed all the usual capacitor around, nothing on all other i/o, simple LED+300 ohm resistor... work fine. if i raise down the psu voltage... it's working from 2.5V. so uneless your Vdd rail is below or really noisy causing a RESET... i don't see why it shouldn't work.