Motorola SSETM 5000 service manual Mcu

	Glossary-5
Term	Definition
liquid-crystal display	An LCD uses two sheets of polarizing material with a liquid-crystal
	solution between them. An electric current passed through the liquid
	causes the crystals to align so that light cannot pass through them.
LO	See local oscillator.
local oscillator	A device used to generate a signal that is combined with another signal
	in order to mix the second signal to a different frequency.
low-speed	150-baud digital data sent to the radio during trunked operation while
handshake	receiving audio.
LSH	See low-speed handshake.
Master In Slave Out	SPI data line from a peripheral to the MCU.
Master Out Slave In	SPI data line from the MCU to a peripheral.
MCU	See microcontroller unit.
MDC	Motorola Digital Communications.
MHz	See Megahertz.
Megahertz	One million cycles per second. Used especially as a radio-frequency
	unit.
microcontroller unit	Also written as µC. A microprocessor that contains RAM and ROM
	components, as well as communications and programming components
	and peripherals.
MISO	See Master In Slave Out.
MOSFET	Metal-Oxide-Silicon Field Effect Transistor
MOSI	See Master Out Slave In.
multiplexer	An electronic device that combines several signals for transmission on
	some shared medium (e.g., a telephone wire).
MUX	See multiplexer.
NiCd	Nickel-cadmium.
NiMH	Nickel-metal-hydride.
ohm	A unit of electrical resistance.
OMPAC	See over-molded pad-array carrier.
open architecture	A controller configuration that utilizes a microprocessor with extended
	ROM, RAM, and EEPROM.
oscillator	An electronic device that produces alternating electric current and
	commonly employs tuned circuits and amplifying components.

6881094C12-A November 11, 2004