Dann versuche es mal so.


Code:
$regfile = "m16def.dat"                                     ' ATmega16
$crystal = 8000000                                          ' for STK500
$baud = 19200


'**************** TIMER 1 ******************************
Config Timer1 = Timer , Compare A = Toggle , Prescale = 1 , Clear Timer = 1
Compare1a = 100
Config Pind.5 = Output
'**************** END TIMER 1 ***************************
On Compare1a InterruptR
Enable Timer1
Enable Interrupts

InterruptR
IF Compare1a=100 THEN
Compare1a=200
ELSE
Compare1a=100
END