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TLE4943C датащи(PDF) 41 Page - Infineon Technologies AG |
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TLE4943C датащи(HTML) 41 Page - Infineon Technologies AG |
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41 / 48 page ![]() TLE4943C Data Sheet 41 V 1.2, July 2018 3.8 Watchdog Reset after Offset Jump Figure 28 Reset is triggered after watchdog delay time and signal watchdog When an offset jump, greater than the amplitude of the magnetic speed signal occurs, no zero crossing is passed anymore and therefore sensor outputs no speed pulse. Instead, standstill protocol is issued. After transmitting five standstill protocols (typ. 750ms) the signal watchdog starts. If still no speed pulse is output sensor starts to detect extreme with minimum DNC (digital noise constant). After detecting nswd extreme and still no speed pulse issued, sensor triggers internal reset and enters uncalibrated mode. Therefore validity of direction, direction information, validity of airgap and airgap measurement are set to default values. This represents the same status as after power on. Therefore offset calibration starts again. dB Watchdog timer Signal watchdog Standstill protocol Offsetjump C D Uncal Mode B A Reset |
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