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TLE5014
GMR-Based Angle Sensor
Interfaces overview
Table 2
PWM Interface configuration (cont'd)
Parameter
PWM diagnostic duty cycle high 0x0066
PWM predevider for PWM period 0x0068
PWM period
PWM starting edge
Care has to be taken when programming the low and high diagnostic duty cycle that there is no overlap with
the programmed data duty cycle range. In such a case, diagnostic information (e.g. sensor failure) could not
be distinguished from a valid transmitted angle value. It is recommended to add a safety margin between the
diagnostic and the data duty cycle range.
2.2
SPC Interface Configuration
The following table shows the different options for SPC interface configuration. The details for the EEPROM
setting are shown in
Chapter 4.3
Table 3
SPC Interface configuration
Parameter
SPC low time
Temperature information in SPC
protocol
Rolling counter
Rolling counter in CRC
SPC trigger
User's Manual
EEPROM
Description
Register
This value determines the duty cycle which indicates a
sensor reset or a sensor start-up error (BIST error)
This value is used for PWM frequency adjustment according
to
Equation (4.1)
0x006A
This value is used for PWM frequency adjustment according
to
Equation (4.1)
0x00A2
This value determines the starting edge of the PWM protocol.
It can be rising or falling. In case a rising edge is selected, the
PWM protocol will start with a HIGH level. In case a falling
edge is selected, it will start with a LOW
EEPROM
Description
Register
0x00A2
This value can be 5 UT or 3 UT. With 5 UT, the SPC nibble is
compliant to the SENT specification
0x00A2
The SPC frame can contain two additional nibbles for
transmitting the temperature information
0x00A2
A 4-bit rolling counter (rolling counter nibble) can be
activated which counts the transmitted frames. This is
necessary for functional safety applications to increase the
diagnostic coverage
0x00A2
The rolling counter information can be coded in the CRC of
the SPC frame instead of being transmitted as extra nibble.
In this case the rolling counter information has 2 bit only.
This feature reduces overall frame length of the SPC protocol
0x00A2
Two options are available for the total trigger length. It can
be constant with a length of 90 UT or variable. The variable
trigger length is t
time t
. Both settings can be used in a bus configuration as
low
the address of the sensor is defined by the low time t
The advantage of the variable trigger length is that the total
frame length can be reduced
7
+12 UT and depends on the trigger low
low
only.
low
Rev. 1.0
2019-03-12
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