Monitoring circuit with a window watchdog
AssigneeInfineon Technologies AG
InventorsMartin Kaltenegger, Michael Hausmann
Life of this patent
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Abstract
A method of monitoring a processing circuit is disclosed. The processing circuit is operable, in a normal operation mode, to generate a sequence of trigger commands, with at least one trigger command of the sequence of trigger commands including time information. At least one window sequence with a closed window period and an open window period is generated such that the duration of the closed window period and/or the open window period is defined, at least in part, by the time information. It is detected if one trigger command is received within the open window period of the at least one sequence.
Claims17
A method of monitoring a processing circuit operable, in a normal operation mode, to generate a sequence of trigger commands, with at least one trigger command of the sequence of trigger commands including time information, the method comprising:
- generating at least one window sequence with a closed window period and an open window period such that the duration of the closed window period and/or the open window period is defined, at least in part, by the time information;
- and
- detecting if one trigger command is received within the open window period of the at least one sequence.
A monitoring circuit comprising a watchdog device, the watchdog device operable
- to receive a sequence of trigger commands, with at least one trigger command of the sequence of trigger commands including at least time information,
- to generate at least one window sequence with a closed window period and an open window period such that the duration of at least one of the closed window period and the open window period is defined by the at least time information;
- and
- to detect if one trigger command is received within the open window period of the at least one sequence.
A circuit arrangement comprising:
- a processing circuit operable, in a normal operation mode, to generate a sequence of trigger commands, with at least one trigger command of the sequence of trigger commands including at least time information, the processing circuit comprising a monitoring circuit comprising a watchdog device, the watchdog device operable:
- to receive the sequence of trigger commands,
- to generate at least one window sequence with a closed window period and an open window period such that the duration of at least one of the closed window period and the open window period is defined by the at least time information, and
- to detect if one trigger command is received within the open window period of the at least one sequence.
Dependencies are inferred from the claim text.