TLE4943C datasheet(18/48 Pages) INFINEON

Il numero della parte	TLE4943C

Spiegazioni elettronici	Hall Based Differential Wheel Speed Sensor with AK protocol

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Produttore elettronici	INFINEON [Infineon Technologies AG]

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18 / 48 page

TLE4943C

Data Sheet

V 1.2, July 2018

Figure 12

Protocol at standstill

Note on the standstill - travel transition:

If an increment of the magnetic encoder is detected, the standstill protocol will be aborted. The speed pulse Ihigh

with the initiating initial bit (with the level Ilow) has precedence. Due to the suppression of "bit stumps" also required

in the standstill protocol, the cutting of the protocol can actually only take place between two data bits, and not

during an ongoing bit transmission. The initial bit enables the speed pulse to always be preceded by a current level

Ilow for a duration of at least tp/2. This is helpful for the detection of the speed pulse in the ECU (electronic control

unit).

Zero Crossing

Speed pulse

Data protocol

Sensor output

current Is

Initial bit

Speed replacement

pulse

Initial bit

tp/2

bit0

bit5

bit4

bit3

bit2

bit1

bit7

bit6

Parity

tstop

tp/2

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