Unusual problem with atmega8

[mishra12]

dear experts
a simple lcd interfacing code ,code was compiled with no errors and verified in proteus .
my circuit
vcc pin7 of atmega8
gnd pin8 of atmega8
internal crystal used
then by mistakely i connected AVCC to gnd
but lcd showed the text message after half mins my atmega8 was very hot ,i removed power supply and AVCC connected to VCC now it does not showed anything what is the problem ?my question is why lcd displayed test message even AVCC connected to the ground ?

 

[jayanth.devarayanadurga]

AVCC is the VCC for ADC circuit. I think your ADC circuit is damaged if not the whole chip.

 

[mishra12]

chip is damaged no doubt heated up in 10 secs