TLE5011 Datasheet, PDF (24/43 Pages) Infineon Technologies AG – GMR Angle Sensor

TLE5011
Specification
The margin time shown in Table 12 is the time between write access to the SSC data line and the earliest possible
sample read of the TLE5011 itself for read-back.
It is useful to have a maximum distance between the WRITE and subsequent READ. This ensures a reliable read-
back of the written data for the Slave-Active Byte generation.
Table 12 Maximum Pull-up Time Margin with Worst-Case Specified Timing
SSC_FILT
0
SSC_TIMING
don’t care
Min. t_PU Margin ¹⁾
90
Unit
Comment
ns
1
50
1) Calculation: Margin=t_SCKl(min)+t_DATwMAX-(t_PU)-t_DATrMIN.For Margin<50 ns no problems can occur.
3.9.2 SSC Baud rate
The SSC baud rate depends on the internal clock frequency.
Twelve internal digital clock cycles are necessary to ensure reliable operation. Therefore, the maximum SSC baud
rate depends on the external CLK.
f_SSC
=
f_{--C----L---K-}
2
3.9.3 SSC Spike Filter
A spike filter for all SSC lines can be selected via the SSC_FILT bit.
SSC Spike Filter Off
When the spike filter is disabled, each slope with rising voltage is used to define a bit. This is independent of the
length of the sampled pulse. For example, a positive spike generates a rising and a falling edge.
SSC Spike Filter On
A sliding window with four consecutive sample bits is analyzed.
The sample frequency is:
f_S
=
-------1-------
f_DIGIT
Rising Edge Detect for SCK
• After a rising edge (LH combination), at least one of the two following samples must be high. Valid bit
combinations: 0111 , 0110 , 0101.
• A falling condition must be detected previously.
Falling Edge Detect for SCK
• After a falling edge (HL combination), at least one of the two following samples must be low. Valid bit
combinations: 1000 , 1001 , 1010.
• A rising condition must be detected previously.
Final Data Sheet
24
V1.1, 2010-05