Table 18

(continued) PWM interface parameters

Parameter

Symbol

Values

Unit

Note or condition

Min.

Typ.

Max.

High diagnostic

duty cycle (f ≥

2kHz)

DCdiag_high,>

2kHz

85

-

99

%

high time to period; f ≥ 2kHz PWM frequency

Low diagnostic

duty cycle

DCdiag_low

1

-

25

%

high time to period; f < 2kHz PWM frequency

Low diagnostic

duty cycle (f ≥

2kHz)

DCdiag_low,>

2kHz

1

-

15

%

high time to period; f ≥ 2kHz PWM frequency

Minimum data

duty cycle range

DCdata_min 29

-

71

%

high time to period; f < 2kHz PWM frequency

Minimum data

duty cycle range

(f ≥ 2kHz)

DCdata_min,>

2kHz

19

-

81

%

high time to period; f ≥ 2kHz PWM frequency

5.2.2

SENT Interface

The sensor supports a SENT (Single Edge Nibble Transmission) interface according to SAE J2716 v.2016-04.

 

SENT interface description

The SENT interface is a standardized, uni-directional digital protocol. The information is coded in nibbles with

different length. One nibble contains 4 bit of information.

The unit time (UT) and nibble low time are configurable. This can reduce the overall frame length. The low time

includes the fall time of the edge. It has to be ensured that the fall time of the edge is fast enough to reach the low

level within the configured low time.

Table 19

SENT Configuration Parameters

Parameter

Symbol

Values

Unit

Note or condition

Min.

Typ.

Max.

SENT unit time UT

0.75

-

3.0

µs

default 3.0µs, configurable steps (0.75, 1,

1.25,1.5, 2.0, 2.5, 3.0), tolerance given by clock

tolerance

SENT nibble low

time

tlow

3

-

5

UT

including the fall time of the edge.

 

Standard sensor:

The protocol consists of the following nibbles

•

A synchronization period (56 UT)

•

A status nibble of 12-27 UT, with optional short serial message information

•

3 or 4 data nibbles of 12-27 UT, transmitting the angle value or the angle speed (configurable in EEPROM)

•

Optional 2 temperature nibbles of 12-27 UT each (configurable in EEPROM)

•

Optional 1 nibble (4 bit) rolling counter of 12-27 UT 

TLE49SR

Datasheet

5  Specific module descriptions

Datasheet

18

Rev. 1.1.1

2024-03-13