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AN238 - Tire Pressure Monitoring (TPM) System

Key Features

  • an internal RC oscillator, thereby reducing the external component count which, directly reduces module cost as well as circuit board size. Third, this device includes the RF transmitter circuitry, which again reduces external component count, cost and overall size of the circuit board. The rfPIC12F675 also has an internal comparator which plays an important role in decoding the information from the LF link. The internal comparator helps reduce overall part count, thereby further reducing module.

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Full PDF Text Transcription (Reference)

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www.DataSheet4U.com AN238 Tire Pressure Monitoring (TPM) System Authors: Ruan Lourens Microchip Technology Inc. Curtis Kell Kell Laboratories An auto-location system can dynamically detect the position of a specific sensor, which is useful when tires are rotated. The heart of the TPM system is the Sensor/Transmitter (S/TX) device and it is based on Microchip's rfPIC12F675. INTRODUCTION This document explains a typical tire pressure monitoring (TPM) system specifically intended for automotive use. It serves as a reference to design a real-world system based on various Microchip products. A TPM system primarily monitors the internal temperature and pressure of an automobile's tire.