Motorola MVME2300 Series - Manual (Page 272)

Glossary
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SCSA Signal Computing System Architecture. A hardware model for
computer telephony servers. A key SCSA element is a TDM (time
division multiplexed) telephony bus for voice and video signals,
known as the SCbus™ in VME implementations of this architecture.
SCSI Small Computer Systems Interface. An industry-standard high-
speed interface primarily used for secondary storage. SCSI-1
provides up to 5 Mbps data transfer.
SCSI-2 (Fast/Wide) An improvement over plain SCSI; and includes command queuing.
Fast SCSI provides 10 Mbps data transfer on an 8-bit bus. Wide
SCSI provides up to 40 Mbps data transfer on a 16- or 32-bit bus.
serial port A connector that can exchange data with an I/O device one bit at a
time. It may operate synchronously or asynchronously, and may
include start bits, stop bits, and/or parity.
SIM Serial Interface Module
SIMM Single Inline Memory Module. A small circuit board with RAM
chips (normally surface mounted) on it designed to fit into a standard
slot.
SIO Super I/O controller
SMT Surface Mount Technology. A method of mounting devices (such as
integrated circuits, resistors, capacitors, and others) on a printed
circuit board, characterized by not requiring mounting holes. Rather,
the devices are soldered to pads on the printed circuit board.
Surface-mount devices are typically smaller than the equivalent
through-hole devices.
software A computing system is normally spoken of as having two major
components: hardware and software. Software is the term used to
describe any single program or group of programs, languages,
operating procedures, and documentation of a computer system.
Software is the real interface between the user and the computer.
SRAM Static Random Access Memory
TDM Time Division Multiplexing. A multiplexing scheme in which
individual I/O ports or channels share slices of time on an aggregate
channel, Receivers and transmitters are synchronized. The SCbus™
is a TDM implementation that provides up to 2048 time slots, the
equivalent of 1024 voice conversations at 64 Kbps.
thick Ethernet See 10base-5.