Tire Pressure Monitoring (TPM) System from Microchip
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. There is a variety of system approaches to follow; although this one is a rather comprehensive auto-location system.
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.
SYSTEM COMPONENTS
The TPM system consists of the following major component.
• Sensor/Transmitter Device
• RF Receiver Module
• Low Frequency (LF) Commander Device
• Control Unit
• Pressure Vessel (Tire)
Download Tire Pressure Monitoring System (TPMS) Application Note from Microchip
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