Processor Users Manual

Part I-lxviii MPC8260 PowerQUICC II UserÕs Manual MOTOROLA

Part I. Overview

REG[FIELD] Abbreviations or acronyms for registers or buffer descriptors are

shown in uppercase text. SpeciÞc bits, Þelds, or numerical ranges

appear in brackets. For example, MSR[LE] refers to the little-endian

mode enable bit in the machine state register.

x In certain contexts, such as in a signal encoding or a bit Þeld,

indicates a donÕt care.

n Indicates an undeÞned numerical value

Acronyms and Abbreviations

Table iv contains acronyms and abbreviations that are used in this document.

Table iv. Acronyms and Abbreviated Terms

Term Meaning

ATM Asynchronous Mode

BD Buffer descriptor

BPU Branch processing unit

COP Common on-chip processor

CP Communications processor

CPM Communications processor module

CRC Cyclic redundancy check

CTR Count register

DABR Data address breakpoint register

DAR Data address register

DEC Decrementer register

DMA Direct memory access

DPLL Digital phase-locked loop

DRAM Dynamic random access memory

DTLB Data translation lookaside buffer

EA Effective address

FCCÔ Fast communications controller

FPR Floating-point register

GPCM General-purpose chip-select machine

GPR General-purpose register

HDLC High-level data link control

C Inter-integrated circuit

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