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TLE4943C датащи(PDF) 41 Page - Infineon Technologies AG

номер детали TLE4943C
подробное описание детали  Hall Based Differential Wheel Speed Sensor with AK protocol
PDF  48 Pages
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производитель  INFINEON [Infineon Technologies AG]
домашняя страница  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TLE4943C датащи(HTML) 41 Page - Infineon Technologies AG

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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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