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Glossary
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A/D, ADC Analog-to-Digital converter; converts an instantaneous dc voltage level to a
corresponding digital value.
ABACUS IC Custom integrated circuit providing a digital receiver IF backend.
CODEC Coder/Decoder IC for analog-to-digital and digital-to-analog conversion.
CPS Customer Programming Software
D/A, DAC Digital-to-Analog converter; converts a digital value to a corresponding dc
voltage value.
DPL Digital Private-Line™
DSP Digital Signal Processor; microcontroller specifically tailored for signal
processing computations. In this case refers specifically to Motorola
DSP56603.
Firmware Software or a software/hardware combination of computer programs and data,
with a fixed logic configuration stored in a read-only memory; information
can not be altered or reprogrammed.
FGU Frequency Generation Unit
FLASHport™ A Motorola term that describes the ability of a radio to change memory. Every
FLASHport radio contains a FLASHport EEPROM memory chip that can be
software written and rewritten to, again and again.
Host Motorola HC12A4 microcontrol unit U204 (see MCU).
Host Port Parallel memory mapped interface consisting of eight registers in the
DSP56603.
IC Integrated Circuit
IMBE Improved Multi-Band Excitation: a sub-band, voice encoding algorithm used
in ASTRO digital voice.
MCU MicroControl Unit
MDC Motorola Digital Communications
MISO Master In Slave Out; used by the slave device to send data to the master device.
MOSI Master Out Slave In; used by the master device to send data to the slave device.
OMPAC Over-Molded Pad-Array Carrier; a Motorola custom IC package, distinguished
by the presence of solder balls on the bottom pads.
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