Data processing: measuring – calibrating – or testing – Calibration or correction system – Zeroing
Reexamination Certificate
2006-08-08
2006-08-08
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Zeroing
C327S143000, C713S340000, C713S500000, C714S022000, C702S085000
Reexamination Certificate
active
07089133
ABSTRACT:
A method and circuit provide a system level reset function for an electronic device. An initial reset function is provided under a low voltage condition of supply voltage, such as occur upon first energizing the electronic device. A tunable reset function is also provided, which can first be asserted at a voltage level setting less precise than that setting becomes upon tuning. Further, a boot-up reset function is provided, which provides its reset function at a voltage level setting that is set according to a calibration. Calibration can be based on data stored in a non-volatile memory, and can involve a checksum operation. The electronic device, a microcontroller for instance, is held in a reset state with any of the initial, tunable, and boot-up reset functions.
REFERENCES:
patent: 5564010 (1996-10-01), Henry et al.
patent: 5850156 (1998-12-01), Wittman
patent: 6141764 (2000-10-01), Ezell
Blom Eric
Kutz Harold
Snyder Warren
Williams Timothy
Bui Bryan
Cypress Semiconductor Corp.
Le John
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