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TLE4943C Datasheet(PDF) 17 Page - Infineon Technologies AG

Part # TLE4943C
Description  Hall Based Differential Wheel Speed Sensor with AK protocol
PDF  48 Pages
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Manufacturer  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TLE4943C Datasheet(HTML) 17 Page - Infineon Technologies AG

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TLE4943C
Data Sheet
17
V 1.2, July 2018
2.7.5
Data Protocol for Standstill
If for a longer time than tstop no increment is recognized, the IC starts to send the standstill-protocol. This protocols
is sent every 150ms +/- 20%. In this protocol the current value of the speed-pulse is set to Imid and all the other
bits are transmitted like described before. For very slow wheel speeds more than one standstill protocol can be
issued between consecutive speed pulses.
Figure 11
Standstill protocol
dB
Increment n
time
Increment n+1
Increment n+2
28mA
14mA
7mA
Iout
150ms
150ms
550µs Data Bursts
150ms
Incremental
protocol
Data Burst:
on Zero Crossing
Incremental
protocol
Standstill
Protocol
250 ms
500 ms
Standstill Protocol
Data Burst:
150ms after
Increment Protocol
Data Burst



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