Circuit arrangement for executing a reset
AssigneeRobert Bosch GmbH
InventorsWolfgang Kosak, Reinhard Pfeufer, Guenter Braun, Klaus Mueller
Life of this patent
Estimating the term…
Abstract
A circuit arrangement for executing a reset, in which controlled resetting of a functional computer and a safety module takes place. A reset stage is able to coerce both the functional computer and the safety module into a reset state, while all output stages are switched off for all reset states. The functional computer and the safety module are connected by a serial interface to continually monitor each other and can mutually reset one another in the case of a fault.
Claims20
A circuit arrangement for executing a reset of a computing unit, comprising:
- a functional computer;
- a safety module connected to the functional computer via a serial interface, the safety module operating autonomously from the functional computer;
- a reset stage coupled to the functional computer and the safety module, the reset stage being capable of coercively switching each of the functional computer and the safety module into a reset state, the functional computer continually monitoring the safety module and the safety module continually monitoring the functional computer, wherein in a fault condition, the functional computer is capable of resetting the safety module and the safety module is capable of resetting the functional computer;
- at least one output stage coupled to the functional computer and the safety module, the at least one output stage being switched off in the reset state:
- a first switching stage having an output coupled to a NMI input of the functional computer;
- and
- a second time-delayed switching stage connecting the output of the first switching stage to a reset input of the functional computer,
- wherein a reset output of the reset stage is coupled to an input of the first switching stage.
A circuit arrangement for executing a reset of a computing unit, comprising:
- a functional computer;
- a safety module connected to the functional computer via a serial interface, the safety module operating autonomously from the functional computer;
- a reset stage coupled to the functional computer and the safety module, the reset stage being capable of coercively switching each of the functional computer and the safety module into a reset state, the functional computer continually monitoring the safety module and the safety module continually monitoring the functional computer, wherein in a fault condition, the functional computer is capable of resetting the safety module and the safety module is capable of resetting the functional computer;
- at least one output stage coupled to the functional computer and the safety module, the at least one output stage being switched off in the reset state;
- a first switching stage coupling a reset output of the reset stage and a software reset output of the safety module, an output of the first switching stage being connected to a NMI input of the functional computer;
- and
- a second switching stage connecting the output of the first switching stage to a reset input of the functional computer.
A circuit arrangement for executing a reset of a computing unit, comprising:
- a functional computer,
- a safety module connected to the functional computer via a serial interface, the safety module operating autonomously from the functional computer;
- a reset stage coupled to the functional computer and the safety module, the reset stage being capable of coercively switching each of the functional computer and the safety module into a reset state, the functional computer continually monitoring the safety module and the safety module continually monitoring the functional computer, wherein in a fault condition, the functional computer is capable of resetting the safety module and the safety module is capable of resetting the functional computer;
- at least one output stage coupled to the functional computer and the safety module, the at least one output stage being switched off in the reset state, wherein each of the functional computer and the safety module include a switching output;
- and
- an EGAS output stage directly connected to each of the switching outputs.
Dependencies are inferred from the claim text.