Processor Users Manual

lxii MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
FPU Floating-point unit
GCI General circuit interface
GPCM General-purpose chip-select machine
GPR General-purpose register
GUI Graphical user interface
HDLC High-level data link control
I
2
C Inter-integrated circuit
IDL Inter-chip digital link
IEEE Institute of Electrical and Electronics Engineers
IrDA Infrared Data Association
ISDN Integrated services digital network
ITLB Instruction translation lookaside buffer
IU Integer unit
JTAG Joint Test Action Group
LIFO Last-in-Þrst-out
LR Link register
LRU Least recently used
LSB Least-signiÞcant byte
lsb Least-signiÞcant bit
LSU Load/store unit
MAC Multiply accumulate
MESI ModiÞed/exclusive/shared/invalidÑcache coherency protocol
MMU Memory management unit
MSB Most-signiÞcant byte
msb Most-signiÞcant bit
MSR Machine state register
NaN Not a number
NIA Next instruction address
NMSI Nonmultiplexed serial interface
No-op No operation
OEA Operating environment architecture
OSI Open systems interconnection
Table i. Acronyms and Abbreviated Terms (Continued)
Term Meaning