Device with programmable memory and method of programming
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United States of America Patent
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Mar 21, 2000
Grant Date -
N/A
app pub date -
Feb 2, 1998
filing date -
Feb 2, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A device, preferably an electronically calibrated sensor (100) includes a sensing element (102) with an output coupled to a calibration circuit (104). The calibration circuit (104) includes an electronically erasable programmable read only memory (EEPROM) (114). An EEPROM fuse (204) is employed in association with the EEPROM (114) which in a programming-disable logical state disables the write/erase program logic (208). The EEPROM fuse (204) may only be erased upon a valid fuse override signal (232) the input for which (224) in a final packaged device is inaccessible.
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