TLE5012_10 Datasheet, PDF (55/64 Pages) Infineon Technologies AG – GMR-Based Angular Sensor for Rotor-Position Sensing

Ideal Switching Point
TLE5012
Specifications
Figure 24 HS hysteresis
α_HShystel α_HShystel
α_elect
0°
α_elect
3.5.4 Incremental Interface
The Incremental Interface (IIF) uses an up/down counter of a microcontroller for the angle transmission. The
synchronization is done by the parallel active SSC Interface. The angle value read out by the SSC Interface can
be compared to the stored counter value. In case of a non-synchronization, the microcontroller adds the difference
to the actual counter value to synchronize the TLE5012 with the microcontroller. The resolution of the IIF can be
selected within the interface mode4 register (MOD_4) under IFAB_RES.
After startup, the IIF pulses out the actual absolute angle value to notify the microcontroller about the absolute
position.
In register MOD_1 the IIF can be set in A/B mode or Step/Direction mode (IIF_MOD).
A/B Mode
The phase shift between phase A and B indicates a clockwise (A follows B) or a counterclockwise (B follows A)
rotation of the magnet.
Step/Direction Mode
Phase A pulses out the increments and phase B indicates the direction (Figure 25).
Incremental
Interface
(Step/Dir Mode)
Step ^VH
VL
V_H
Direction _VL
Counter Value 0
1
2
3
4
Figure 25 Incremental Interface with Step/Direction mode
3
2
1
Final Data Sheet
55
V 1.0, 2010-11