dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 691

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

CAS
Appendix C
Glossary
The following terms may be useful in understanding the material in this manual.
A/D
ADC
AGU
ALU
AMPS
ASIC
BGA
Bus
Freescale Semiconductor
analog-to-digital
The process or characteristic of converting an analog signal into a digital representation of
that signal. See also D/A.
analog-to-digital converter
A circuit that performs an analog-to-digital conversion. See also DAC.
address generation unit
The functional block within a processor that performs address calculations and that provides
memory access addresses.
arithmetic logic unit
The functional block within a processor where arithmetic operations and logical operations
are performed. These operations include addition, multiplication, logical AND and OR
operations, shift and rotate operations, and so forth.
Advanced Mobile Phone Service
A cellular transmission system that is fundamentally analog. AMPS transmits voice signals
using an FM transmitter, just as a standard two-way radio does. The system performs call
supervision functions (on hook, off hook, hook flash, and so on) with various analog
signaling tones. However, AMPS signals for call setup with digital signaling. An important
variation of this system is NAMPS, which Freescale developed.
Application Specific Integrated Circuit
An integrated circuit that is designed for a specific task and that performs that task. An ASIC
cannot be reprogrammed to perform another task.
ball grid array
A flat ceramic or plastic package, usually square, that is used to hold an integrated circuit.
The electrical leads, or pins, are located in a grid-like pattern on one of the flat sides, and the
leads somewhat resemble hemispheres. A BGA is similar to a PGA.
An electronic “traffic lane” that carries electrical signals through one chip to another chip. For
example, an address bus takes the electrical signals that define a certain memory address and
transfers them to a memory device (such as a RAM or ROM device).
column address strobe
The signal that tells a memory device to accept the given address as a column address. CAS
is used with RAS and a row address to select a bit within the device.
Glossary
C-1