The primary objective of this user’s manual is to define the functionality of the PowerPC603™ and PowerPC 603e™ microprocessors for use by software and hardware developers.Although the emphasis of this manual is upon the 603e, all of the information withinapplies to both the 603 and 603e, except for those differences noted in Appendix C,“PowerPC 603 Processor System Design and Programming Considerations.” Those readerswho are primarily interested in the 603 should begin with Appendix C.In addition, this book describes the EC603e™ microprocessor. The EC603emicroprocessor for embedded systems is functionally equivalent to the 603e with theexception of the floating-point unit which is not supported on the EC603e microprocessor;therefore, the term ‘EC603e’ is used only when it is necessary to distinguish functionaldifferences with the EC603e microprocessor.The 603e is built upon the low-power dissipation, low-cost and high-performance attributesof the 603 while providing the system designer additional capabilities through higherprocessor clock speeds, increases in cache size (16-Kbyte instruction and data caches) andset-associativity (4-way), and greater system clock flexibility. The 603e only implementsthe 32-bit portion of the PowerPC™ architecture.The 603e and EC603e microprocessors are implemented in both a 2.5-volt version (PID0007v 603e microprocessor, abbreviated as PID7v-603e) and a 3.3-volt version (PID 0006603e microprocessor, abbreviated as PID6-603e).In this document, the term ‘603e’ is used as an abbreviation for ‘PowerPC 603emicroprocessor’ and the term ‘603’ is an abbreviation for ‘PowerPC 603 microprocessor’.The PowerPC 603e microprocessors are available from Motorola as MPC603e. TheEC603e microprocessors are available from Motorola as MPE603e.
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