Freescale Semiconductor PowerQUICC MPC885 Reference Manual page 286

x In certain contexts, such as in a signal encoding or a bit field, indicates a don't
care.
n Indicates an undefined numerical value
Acronyms and Abbreviations
Table III-1 contains acronyms and abbreviations that are used in this document. Note that the meanings for
some acronyms (such as SDR1 and DSISR) are historical, and the words for which an acronym stands may
not be intuitively obvious.
Term
BIST Built-in self test
CRC Cyclic redundancy check
CTR Count register
DABR Data address breakpoint register
DAR Data address register
DEC Decrementer register
DMA Direct memory access
DRAM Dynamic random access memory
DTLB Data translation lookaside buffer
EA Effective address
GPR General-purpose register
IEEE Institute of Electrical and Electronics Engineers
ITLB Instruction translation lookaside buffer
LSB Least-significant byte
lsb Least-significant bit
LSU Load/store unit
MMU Memory management unit
MSB Most-significant byte
msb Most-significant bit
MSR Machine state register
PCI Peripheral component interconnect
RISC Reduced instruction set computing
RTOS Real-time operating system
Rx Receive
SPR Special-purpose register
III-2
Table III-1. Acronyms and Abbreviated Terms
MPC885 PowerQUICC Family Reference Manual, Rev. 2
Meaning
Freescale Semiconductor