mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 1147

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

TERMINOLOGY
atomic cycle
autobaud
big-endian
breakpoint
burst
burst length
copyback
critical-data first
critical-word first
datastream
If multiple bus transactions by a bus master occur in a sequence where the master
The process of determining a serial data rate by timing the width of a single bit.
Big-endian ordering assigns the lowest address to the highest order (leftmost) eight bits
An event that forces the machine to branch into a breakpoint exception routine.
A bus transfer that has more than one piece of data associated with it.
The number of data associated with a burst cycle. For example, a burst length of four
Updates to external memory are delayed until forced by the user program or a transfer
This feature allows the data transferred during the burst cycle to be organized where
The word that the processor wants first.
A sequence of information to be processed by the core.
retains ownership of the bus during the duration of the sequence, thus preventing other
master(s) from transferring in the middle of the sequence, the sequence is considered
atomic.
of the scalar. This called big-endian because the big end of the scalar, considered a
binary number, comes first in memory.
has four data pieces (four beats) associated with it.
of bus control to an external master. At the time of forced update or relinquishment of
the bus, all changes to the cache are written to external memory. Until that time, cache
and external memory are not coherent.
the word or data needed first is the first one to transfer within the burst-data block. The
order of transferring can be sequential and usually wraps back to the word (or data)
zero. For example, 1
data.
Freescale Semiconductor, Inc.
For More Information On This Product,
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MPC823 REFERENCE MANUAL
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0 for a sequence of four data with data 1 as the critical
Terminology
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