Lpc2000

Today i found some behaviour of the Philips tools which can make
really trouble. So i post if for information:

If you program a hexfile to the Flash, the content of the last written
 page above the addresses given in the hexfile is not defined.

example:
my hexfile ended with

:20C0A00001FFFF0AC09D00004802004048020040FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF16
:00000001FF

The flash content til adress 0xC0BF was okay as given in the hex file.
But the addresses above contained stuff, which seemed to be code of
formerly written pages.

As i understood, the utility uses 4096 Byte write calls. 
But it seems that the ram buffer containing the code is not set to
0xff, when a page was written. 

This makes trouble, if you use some kind of code checksum scheme,
which also covers this address range.