Tire Pressure Monitoring System (TPMS) Block Diagram - Freescale

Tire Pressure Monitoring Systems (TPMS) are a new standard for improved vehicle safety. Freescale utilizes its advanced integration techniques to provide a TPMS solution that provides real-time tire pressure monitoring and alerts the driver to improperly inflated tires. Freescale TPMS products are designed for the Federal Motor Vehicle Safety Standard (FMVSS) 138 and car manufacturer requirements throughout the world.

Freescale's TPMS solution includes a pressure sensor, an 8-bit microcontroller (MCU), a Radio Frequency (RF) transmitter and a 2-axis accelerometer sensor with X and Z axis. This is installed in a module on the wheel rims to provide independent, real-time air pressure measurements for each tire that can be transmitted to the vehicle instrument cluster to instantly inform the driver.

Target Applications
  • Tire Pressure Monitoring System (TPMS)
  • Direct TPMS
  • High-end tire localization