Motorola MPC8260 User Manual

Part I-lxviii

MOTOROLA

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. 

Indicates an undeÞned numerical value

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

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

I

2

C

Inter-integrated circuit 

IEEE

Institute of Electrical and Electronics Engineers