Write to DS2433

I'm using Dallas 1-Wire buttons for a login project.

Now i'm need to write en read from the eeprom in this button.
The reading of the eeprom is not a problem only writing to the eeprom won't work.

for reading i use:
i var byte

for i = 0 to 511
OWIN PORTB.3,%0000,[memory]
serout PORTD.2,N9600,[#memory," Geheugen plaats = ",#i,13,10]
next i