[atmega8] Can't wake up from sleep mode

Hi.

I am working with Atmega8 and I installed Timer/Count2 interrupt service routine. Following the Atmega8 manual, it is possilble that Timer/Count2 ISR can wake up sleep mode(power save)if AS2 is set in ASSR.

But, My code never wake up.

#include #include #include #include

void Uart_Put_Char(unsigned char data) { while ( !( UCSRA & (1