microcontroller memory CRC

Does anyone know what typoe of CRC is being used with the Philips LPC9xx microcontrollers on the user code memory? It is 4 bytes but does not appear to be CRC-32. If the device is erased, or all zeros, the CRc returned is 00 00 00 00. (CRC-16 would return 00 00 as far as I can tell.)

Gary Peek                mailto:mylastname@mycompanyname.com
Industrologic, Inc.      http://www.industrologic.com
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