Patent ID: 7496692

Claim:
A method, in a data processing device, for ensuring a configuration of processor units of the data processing device, comprising: receiving original configuration data for at least one processor unit of the data processing device; storing a copy of the original configuration data in a local storage of a test unit in the data processing device via only a non-private configuration ring communication interface; transmitting a copy of the original configuration data to the at least one processor unit via only the non-private configuration ring communication interface; configuring the at least one processor unit of the data processing device based on the copy of the original configuration data; responsive to the at least one processor unit being configured, interrogating the at least one processor unit for a copy of current configuration data via only a private serial communication interface; storing the copy of the current configuration data in the local storage of the test control unit in the data processing device; and verifying a configuration of the at least one processor unit based on the copy of the original configuration data stored in the local storage of the data processing device, wherein verifying the configuration of the at least one processor unit comprises comparing the copy of the current configuration data to the copy of the original configuration data and wherein the non-private configuration ring communication interface is separate from the private serial communication interface.