Method of synchronizing an electronic device for monitoring the operation of a microprocessor, and an electronic device for carrying out the method
The invention lies in the field of microprocessors. More specifically, the invention relates to a monitoring method for testing the operability of a microprocessor, particularly when the microprocessors are run up from a quiescent mode to an operating mode. The novel method synchronizes an electroni...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
07.05.2002
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| Online Access | Get full text |
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| Summary: | The invention lies in the field of microprocessors. More specifically, the invention relates to a monitoring method for testing the operability of a microprocessor, particularly when the microprocessors are run up from a quiescent mode to an operating mode.
The novel method synchronizes an electronic device for monitoring the operation of a microprocessor (watchdog) with the microprocessor when the microprocessor is run up from a quiescent mode to an operating mode. The synchronization is effected by a trigger signal that is transmitted from the microprocessor to the monitoring device and that signals the operational availability of the microprocessor. The monitoring device, in order to receive the trigger signals, temporally toggles between a CLOSED window status, in which a trigger signal cannot be detected by the monitoring device, and an OPEN window status, in which the received trigger signal brings about synchronization between the microprocessor and the monitoring device. The microprocessor watchdog device has a trigger signal input which toggles, in a clocked manner, between a disabled position (CLOSED window) and an enabled position (OPEN window). The trigger signal is received during the OPEN window. |
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