Motorola ASTRO XTL 1500 Detailed Service Manual page 436

Term
microcontroller unit
microprocessor core
MISO
MOSI
multiplexer
MUX
NiCd
NiMH
OMPAC
open architecture
oscillator
OSW
OTAR
outbound signaling
word
over-molded pad-
array carrier
over-the-air rekeying
PA
paging
Patriot IC
PC Board
phase-locked loop
PL
6815854H01-A
Also written as µC. A microprocessor that contains RAM and ROM
components, as well as communications and programming components
and peripherals.
The central processing unit of the microprocessor and DSP IC and
powered by a lower voltage supply than the logic I/O section.
See Master In Slave Out.
See Master Out Slave In.
An electronic device that combines several signals for transmission on
some shared medium (e.g., a telephone wire).
See multiplexer.
Nickel-cadmium.
Nickel-metal-hydride.
See over-molded pad-array carrier.
A controller configuration that utilizes a microprocessor with extended
ROM, RAM, and EEPROM.
An electronic device that produces alternating electric current and
commonly employs tuned circuits and amplifying components.
See outbound signaling word.
See over-the-air rekeying.
Data transmitted on the control channel from the central controller to the
subscriber unit.
A Motorola custom IC package, distinguished by the presence of solder
balls on the bottom pads.
Allows the dispatcher to remotely reprogram the encryption keys in the
radio.
Power amplifier.
One-way communication that alerts the receiver to retrieve a message.
A dual-core processor that contains an MCU and a DSP in one IC
package.
Printed Circuit Board. Also referred to as a PCB.
A circuit in which an oscillator is kept in phase with a reference, usually
after passing through a frequency divider.
See private-line tone squelch.
Definition
Glossary-5
June 15, 2005