Texas Instruments TMS320C67 DSP Series Programmer's Reference Manual page 111

Glossary
C
C-2
boot: The process of loading a program into program memory.
boot mode: The method of loading a program into program memory. The
C6x DSP supports booting from external ROM or the host port interface
(HPI).
BSL: See board support library.
byte: A sequence of eight adjacent bits operated upon as a unit.
cache: A fast storage buffer in the central processing unit of a computer.
cache controller: System component that coordinates program accesses
between CPU program fetch mechanism, cache, and external memory.
central processing unit (CPU): The portion of the processor involved in
arithmetic, shifting, and Boolean logic operations, as well as the genera-
tion of data- and program-memory addresses. The CPU includes the
central arithmetic logic unit (CALU), the multiplier, and the auxiliary regis-
ter arithmetic unit (ARAU).
chip support library (CSL): The CSL is a set of application programming
interfaces (APIs) consisting of target side DSP code used to configure
and control all on-chip peripherals.
clock cycle: A periodic or sequence of events based on the input from the
external clock.
clock modes: Options used by the clock generator to change the internal
CPU clock frequency to a fraction or multiple of the frequency of the input
clock signal.
code: A set of instructions written to perform a task; a computer program or
part of a program.
coder-decoder or compression/decompression (codec): A device that
codes in one direction of transmission and decodes in another direction
of transmission.
compiler: A computer program that translates programs in a high-level lan-
guage into their assembly-language equivalents.
compress and expand (compand): A quantization scheme for audio sig-
nals in which the input signal is compressed and then, after processing, is
reconstructed at the output by expansion. There are two distinct com-
panding schemes: A-law (used in Europe) and µ-law (used in the United
States).
control register: A register that contains bit fields that define the way a de-
vice operates.