CY8C20X34_08 Datasheet, PDF (198/216 Pages) Cypress Semiconductor – Technical Reference Manual (TRM)

Section F: Glossary
chaining
checksum
chip
clear
clock
clock generator
CMOS
comparator
compiler
configuration
configuration space
crowbar
crystal oscillator
cyclic redundancy
check (CRC)
Connecting two or more 8-bit digital blocks to form 16-, 24-, and even 32-bit functions. Chaining
allows certain signals such as Compare, Carry, Enable, Capture, and Gate to be produced from
one block to another.
The checksum of a set of data is generated by adding the value of each data word to a sum. The
actual checksum can simply be the result sum or a value that must be added to the sum to gen-
erate a pre-determined value.
A single monolithic Integrated Circuit (IC). See also integrated circuit (IC).
To force a bit/register to a value of logic 0.
The device that generates a periodic signal with a fixed frequency and duty cycle. A clock is
sometimes used to synchronize different logic blocks.
A circuit that is used to generate a clock signal.
The logic gates constructed using MOS transistors connected in a complementary manner.
CMOS is an acronym for complementary metal-oxide semiconductor.
An electronic circuit that produces an output voltage or current whenever two input levels simul-
taneously satisfy predetermined amplitude requirements.
A program that translates a high level language, such as C, into machine language.
In a computer system, an arrangement of functional units according to their nature, number, and
chief characteristics. Configuration pertains to hardware, software, firmware, and documenta-
tion. The configuration will affect system performance.
In PSoC devices, the register space accessed when the XIO bit, in the CPU_F register, is set to
‘1’.
A type of over-voltage protection that rapidly places a low resistance shunt (typically an SCR)
from the signal to one of the power supply rails, when the output voltage exceeds a predeter-
mined value.
An oscillator in which the frequency is controlled by a piezoelectric crystal. Typically a piezoelec-
tric crystal is less sensitive to ambient temperature than other circuit components.
A calculation used to detect errors in data communications, typically performed using a linear
feedback shift register. Similar calculations may be used for a variety of other purposes such as
data compression.
D
data bus
data stream
data transmission
A bi-directional set of signals used by a computer to convey information from a memory location
to the central processing unit and vice versa. More generally, a set of signals used to convey
data between digital functions.
A sequence of digitally encoded signals used to represent information in transmission.
The sending of data from one place to another by means of signals over a channel.
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Spec. # 001-13033 Rev. *A, February 19, 2008
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