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TLE5014
GMR-Based Angle Sensor
Interfaces overview
2
Interfaces overview
Depending on the application, the TLE5014 is available with different interfaces:
•
PWM (Pulse Width Modulation)
•
SPC (Short PWM Code)
•
SENT (Single Edge Nibble Transmission)
•
SICI (Single-wire Interface for Calibration and Inspection; for programming purpose only)
PWM
The PWM is an unidirectional interface. Only one line is needed in which the angle value is transmitted. The
angle value corresponds to the duty cycle of the signal data. A reserved duty cycle range is implemented which
is used for indication of internal detected device errors. The data duty cycle range and the error duty cycle
range can be programmed via EEPROM setting.
SPC
The SPC is an interface based on the SENT protocol. The ECU (master µC) sends a trigger pulse which triggers
the TLE5014 to transmit the 12-bit angle value. If desired, the temperature can also be transmitted on a slow
channel (short serial message). The SPC also sends a CRC nibble and an end-pulse to terminate the
communication. One line is needed for the transmission and the pins IF1, IF2 and IFC are used to set the slave
number. Up to four slaves can be connected to one ECU; the ECU trigger pulse length will trigger the respective
sensor.
SENT
SENT is a standardized interface described in SAE J2716-2010.
SICI
A PWM based, bidirectional interface which is used for programming purpose only.
Further details on the SENT, SPC and PWM interface can be found in the data sheet of TLE5014.
2.1
PWM Interface Configuration
The following configuration of the PWM interface is possible. Further details are in the EEPROM register
description in
Chapter
4.
Table 2
PWM Interface configuration
Parameter
PWM data duty cycle range
minimum value
PWM data duty cycle range
maximum value
PWM diagnostic duty cycle low
User's Manual
EEPROM
Description
Register
0x0060
This value determines the low value of the duty cycle for
angle transmission. It corresponds to an angle value of 0°
0x0062
This value determines the high value of the duty cycle for
angle transmission. It corresponds to an angle value of
359.91°
0x0064
This value determines the duty cycle which indicates a
sensor failure detected by the internal safety mechanism
6
Rev. 1.0
2019-03-12
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