Application NoteNxp

MPC574xP SENT/SPC Driver

Application note for the SENT/SPC driver for MPC574xP MCUs, detailing SAE J2716 protocol, SPC enhancements, and API implementation for automotive sensor communication.

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Overview

This application note describes the implementation of a SENT/SPC driver for the NXP MPC574xP 32-bit microcontroller family. It provides a technical overview of the Single Edge Nibble Transmission (SENT) protocol based on SAE J2716, including the encoding scheme for synchronization, status, data, and CRC nibbles. The document further details the Short PWM Code (SPC) enhancement, which enables half-duplex synchronous communication between the MCU (receiver) and sensors (transmitters). It includes information on the driver's functional description, API, memory allocation, and hardware physical layer requirements using components like the BSS138 for level shifting. The driver is designed to interface with automotive sensors such as the Infineon TLE4998C and TLE4998S.

Use Cases

Electric power steering (EPS)
Throttle position sensing
Pedal position sensing
Airflow mass sensing
Liquid level sensing
High-resolution sensor data transmission to automotive ECUs

Topics

SENT

SPC

SAE J2716

MPC574xP

MPC5744P

TLE4998C

Automotive Sensors

Microcontroller Driver

ECU

Single Edge Nibble Transmission

Referenced Parts

TLE4998C

Infineon

The information about the SPC enhancement has been derived from the TLE4998C Data Sheet, Rev 1.0, December 2008.

MPC574xP

NXP

This application note describes the SENT/SPC driver for the MPC574xP 32-bit microcontrollers.

TLE4998S

Infineon

An example of a TLE4998S SENT waveform and one of a TLE4998C SENT/SPC compatible Hall sensor waveform are shown in Figure 6 and Figure 7.

MPC5744P

NXP

Figure 10. MPC5744P SENT/SPC driver configurator application window

TLE4998C

Infineon

SENT/SPC compatible Infineon TLE4998C programmable linear Hall sensor, including all its supported

BSS138

Nexperia

Equivalent gate pulse widths were obtained by measurement at 23°C ambient temperature using a typical application circuit with a BSS138 N-channel MOSFET transistor.

TLE4998C	Infineon	The information about the SPC enhancement has been derived from the TLE4998C Data Sheet, Rev 1.0, December 2008.
MPC574xP	NXP	This application note describes the SENT/SPC driver for the MPC574xP 32-bit microcontrollers.
TLE4998S	Infineon	An example of a TLE4998S SENT waveform and one of a TLE4998C SENT/SPC compatible Hall sensor waveform are shown in Figure 6 and Figure 7.
MPC5744P	NXP	Figure 10. MPC5744P SENT/SPC driver configurator application window
TLE4998C	Infineon	SENT/SPC compatible Infineon TLE4998C programmable linear Hall sensor, including all its supported
BSS138	Nexperia	Equivalent gate pulse widths were obtained by measurement at 23°C ambient temperature using a typical application circuit with a BSS138 N-channel MOSFET transistor.