Hi Babar,

a LED need about 1.5V.
So all 6 LEDS consume:
6 * (5V - 1.5V) / 100 Ohm = 210mA

But the data sheet tells:
Maximum total I OL for all output pins: 80 mA

So you overloaded your micro by 260%.

So its your fault, not a faulty micro.


Peter