Versuch mal die Schreibweise des Wertes zu ändern:
Code:
$regfile = "m32def.dat"
$crystal = 16000000
$framesize = 30
$hwstack = 30
$swstack = 30

$asm

ldi r16, &hFF
Out Ddrc , R16

ldi r16, &b11110000
Out Portc , R16

Lop:

rjmp lop

$end Asm

End