TLE4998S3C Datasheet, PDF (33/36 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4998S3C
SENT Output Definition (SAE J2716)
This enables a setup of different unit times, even if the internal RC oscillator varies by
±20%. Of course, timing values that are too low could clash with timing requirements of
the application and should therefore be avoided, but in principle it is possible to adjust
the timer unit for a more precise protocol timing. The output characteristic depends on
the external load, the wiring, as well on the pull-up voltage and the temperature. All these
parameters have considerable influence to find the proper unit time setup.
Table 18 Predivider Setting
Parameter
Symbol Limit Values Unit Notes
Register size
Unit time
min. max.
Prediv
4
bit
t_UNIT
2.0 4.0
µs
Predivider¹⁾
Clk_UNIT=8MHz²⁾
1) _{Useable predivider range is decimal 7 to 15. Prediv < 7 is internally kept at 7. Prediv default is decimal = 11 for}
3 µs nominal unit time
2) _{RC oscillator frequency variation +/- 20%}
The nominal unit time is calculated by:
t_UNIT = (Prediv × 2 + 2) / Clk_UNIT
Clk_UNIT = 8MHz ±20%
Data Sheet
33
Rev 1.1, 2009-09