TLE4943C datasheet(11/48 Pages) INFINEON

tên linh kiện	TLE4943C

Giải thích chi tiết về linh kiện	Hall Based Differential Wheel Speed Sensor with AK protocol

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TLE4943C

Data Sheet

V 1.2, July 2018

2.7

Protocol Description

The protocol consists of a pre-bit, a speed pulse and a nine data information bits (data protocol). The data protocol

is Manchester-coded. This means the value of a bit is coded in a rise- or a fall of the signal between the mid-current

value (Imid) and low-current (Ilow) in a certain time window. “0” is represented by a mid-low transition and “1” is

coded by a low-mid transition. Unused bits are output as default values.

Figure 6

Coding of data bits.

Table 1

Coding of Additional Information

Bit #

Meaning

Name

Value after power

up / under voltage

Condition

Error bit,

Airgap reserve

“1” if dB<dB

LR (1=error)

Validity of

signal

amplitude

measurement

SLM

0=measurement of LM0, LM1, LM2 is valid;

1=invalid

not assigned

Direction

validity

GDR

“1” = valid, “0” = invalid

Direction of

rotating

information

“0” =direction positive

Ihigh

Imid

Ilow

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