MPC555 MPC500 - Datasheet Archive

 

This manual defines the functionality of the MPC555 for use by software and hardware developers. The MPC555 is based on the

 

PREFACE This manual defines the functionality of the MPC555 MPC555 for use by software and hardware developers. The MPC555 MPC555 is based on the PowerPC processor used in the Motorola MPC500 MPC500 family of microcontrollers. For further information refer to the MPC500 MPC500 Family RCPU Reference Manual, RCPURM/AD (Motorola order number). Audience This manual is intended for system software and hardware developers and applications programmers who want to develop products for the MPC555 MPC555. It is assumed that the reader understands operating systems, microprocessor and microcontroller system design, and the basic principles of RISC processing. Additional Reading For additional reading that provides background to or supplements the information in this manual see: · John L. Hennessy and David A. Patterson, Computer Architecture: A Quantitative Approach, Morgan Kaufmann Publishers, Inc., San Mateo, CA · PowerPC Microprocessor Family: the Programming Environments, MPCFPE/AD (Motorola order number) · MPC500 MPC500 Family RCPU Reference Manual, RCPURM/AD (Motorola order number) Conventions This document uses the following notational conventions: ACTIVE_HIGH Names for signals that are active high are shown in uppercase text without an overbar. Signals that are active high are referred to as asserted when they are high and negated when they are low. ACTIVE_LOW A bar over a signal name indicates that the signal is active low. Active-low signals are referred to as asserted (active) when they are low and negated when they are high. 0x0F Hexadecimal numbers 0b0011 Binary numbers REG[FIELD] Abbreviations or acronyms for registers are shown in uppercase text. Specific bit fields or ranges are shown in brackets. x In certain contexts, such as a signal encoding, this indicates a don't care. For example, if a field is binary encoded 0bx001, the state of the first bit is a don't care. MPC555 MPC555 REFERENCE MANUAL PREFACE Rev. 20 January 1999 MOTOROLA i NOTE: Throughout this manual references to 3V refer to the nominal supply voltage of 3.3 volts. Nomenclature Logic level one is the voltage that corresponds to Boolean true (1) state. Logic level zero is the voltage that corresponds to Boolean false (0) state. To set a bit or bits means to establish logic level one on the bit or bits. To clear a bit or bits means to establish logic level zero on the bit or bits. A signal that is asserted is in its active logic state. An active low signal changes from logic level one to logic level zero when asserted, and an active high signal changes from logic level zero to logic level one. A signal that is negated is in its inactive logic state. An active low signal changes from logic level zero to logic level one when negated, and an active high signal changes from logic level one to logic level zero. LSB means least significant bit or bits. MSB means most significant bit or bits. References to low and high bytes are spelled out. MOTOROLA ii PREFACE Rev. 20 January 1999 MPC555 MPC555 REFERENCE MANUAL