This application note describes example software to program the thermal assist unit (TAU)feature of the MPC750 family of microprocessors. The TAU is an on-chip sensor thatmeasures the instantaneous junction temperature of the microprocessor. TAU operation isdescribed in the ÒThermal Assist UnitÓ section of theMPC750 RISC Microprocessor UserÕs Manual(order #: MPC750UM/AD). Some of the information from the userÕs manual is largely repeated in Section 1.1, ÒThermal Assist Unit Overview,Ó and Section 1.2, ÒThermal Assist Unit Operation,Ó as a background to understanding the software, but this application note should be used in conjunction with the userÕs manual.The following technical papers describe the physical implementation of the TAU:[1] Hector Sanchez, Ross Philip, Jose Alvarez, Gianfranco Gerosa, ÒA CMOS TemperatureSensor for PowerPCª RISC Microprocessor,Ó Digest of Technical Papers 1997,IEEE Symposium on VLSI Circuits", pp. 13-14, June 1997 .[2] Hector Sanchez, Belli Kuttanna, Tim Olson, Mike Alexander, Gian Gerosa, RossPhilip, and Jose Alvarez, ÒThermal Management System for High PerformanceRISC Microprocessor,ÓDigest of Technical Papers COMPCON97, pp. 325-331 .