Motorola MSC8101 ADS User's Guide Page 302

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Appendix B-12 MSC8101 User’s Guide
Glossary
MII
Media independent interface. Part of the Fast Ethernet specification,
the MII replaces 10BaseT AUI (Attachment Unit Interface) and
connects the MAC layer to the physical layer. The MII is the standard
for all three 100Base-T specifications: 100Base-TX, 100Base-T4, and
100Base0Fx. The MII interface can be used for both 100Base-T and
10Base-T. MSC8101 MII support includes four bits of data for
transmit and four bits of data for receive. If data is transmitted/
received at 100 MBPS, the clock rate must be at least 25 MHz (100
MBPS/4 bits).
MIPS
Millions of instructions per second. A rough measure of processor
performance, measuring the number of instructions that can be
executed in one second. However, different instructions require more
or less time than others, and performance can be limited by other
factors, such as memory and I/O speed.
modulo
An arithmetic term to designate an operation that uses the remainder
value from a division operation.
MPU
Microprocessor Unit.
NSP
Normal stack pointer.
operation
code
Also known as “opcode.” The command part of a machine instruction.
That is, in most cases, the first byte of the machine code that describes
the type of operation and combination of operands to the central
processing unit (CPU).
parameter
RAM
The CPM maintains a section of RAM called the parameter RAM,
which contains many parameters for the operation of the FCCs, SCCs,
SMCs, SPI, I
2
C, and IDMA channels. The exact definition of the
parameter RAM is contained in each protocol subsection describing a
device that uses a parameter RAM. For example, the Ethernet
parameter RAM is defined differently in some locations from the
HDLC-specific parameter RAM.
parking
Granting potential bus mastership without requiring a prior bus
request from that device. This eliminates the arbitration delay
associated with the bus request.
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