1. A method for managing the reset of a data processor, the method comprising: receiving a first reset instruction to reset software for operating the data processor; in a software reset mode distinct from a watchdog reset mode modifying a checksum in a data storage register according to a first preestablished logical or mathematical operation in response to the first reset instruction, setting a software watchdog reset flag in response to the first reset instruction; resetting the data processor; and identifying a reset as a software reset if the software watchdog reset flag is set and if the checksum in the data storage register is modified in accordance with the first preestablished mathematical or logical operation.