Hello Mr. Bart vanveldhoven (or whatever),

Mr. Rob Markham wrote:

The 24c65 does not have a hardware write
protect as the Fairchild , but It does have
a security write protect of 16 4kbit blocks.
But you can only set it once...You may have
accidentally set triggered it.

The security programing highlight can
be viewed at http://members.aol.com/cpu8052/24C65.jpg.

There is a Security command read you can
perform to verify this is your situation.
This will tell you if this is your problem.


Good luck,

Charles Bannister