TLI5012BE1000_15 Datasheet, PDF (15/37 Pages) Infineon Technologies AG – GMR-Based Angle Sensor

TLI5012B E1000
Application Circuits
Synchronous Serial Communication (SSC) configuration
In Figure 3-1 the SSC interface has the default push-pull configuration (see details in Figure 3-2). Series resistors
on the DATA, SCK (serial clock signal) and CSQ (chip select) lines are recommended to limit the current in the
erroneous case that either the sensor pushes high and the microcontroller pulls low at the same time or vice versa.
The resistors in the SCK and CSQ lines are only necessary in case of disturbances or noise.
(SSC Slave) TLI5012B E1000
µC (SSC Master)
Shift Reg.
DATA
EN
SCK
**)
MTSR
EN
MRST
*)
SCK
Shift Reg .
Clock Gen.
CSQ
*)
CSQ
*) optiona,l e.g. 100 Ω
**) optiona,l e.g. 470 Ω
Figure 3-2 SSC configuration in sensor-slave mode with push-pull outputs (high-speed application)
It is also possible to use an open-drain setup for the DATA, SCK and CSQ lines. This setup is designed to
communicate with a microcontroller in a bus system, together with other SSC slaves (e.g. two TLI5012B E1000
devices for redundancy reasons). This mode can be activated using the bit SSC_OD.
The open-drain configuration can be seen in Figure 3-3. Series resistors on the DATA, SCK, and CSQ lines are
recommended to limit the current in case either the microcontroller or the sensor are accidentally switched to push-
pull. A pull-up resistor of typ. 1 kΩ is required on the DATA line.
(SSC Slave) TLI5012B E1000
Shift Reg.
DATA ^*)
typ. 1kΩ
*)
MTSR
µC (SSC Master)
Shift Reg .
SCK
MRST
*)
SCK
Clock Gen.
CSQ
*)
*) optiona,l e.g. 100 Ω
CSQ
Figure 3-3 SSC configuration in sensor-slave mode and open-drain (bus systems)
Data Sheet
15
Rev. 1.1, 2015-09