Specifications

CY8C24094, CY8C24794
CY8C24894, CY8C24994
Document Number: 38-12018 Rev. AH Page 57 of 64
modulator A device that imposes a signal on a carrier.
noise 1. A disturbance that affects a signal and that may distort the information carried by the signal.
2. The random variations of one or more characteristics of any entity such as voltage, current, or data.
oscillator A circuit that may be crystal controlled and is used to generate a clock frequency.
parity A technique for testing transmitting data. Typically, a binary digit is added to the data to make the sum of all the
digits of the binary data either always even (even parity) or always odd (odd parity).
phase-locked
loop (PLL)
An electronic circuit that controls an oscillator so that it maintains a constant phase angle relative to a reference
signal.
pinouts The pin number assignment: the relation between the logical inputs and outputs of the PSoC device and their
physical counterparts in the printed circuit board (PCB) package. Pinouts involve pin numbers as a link between
schematic and PCB design (both being computer generated files) and may also involve pin names.
port A group of pins, usually eight.
power on reset
(POR)
A circuit that forces the PSoC device to reset when the voltage is lower than a pre-set level. This is one type of
hardware reset.
PSoC
®
Cypress Semiconductor’s PSoC
®
is a registered trademark and Programmable System-on-Chip™ is a trademark
of Cypress.
PSoC Designer™ The software for Cypress’ Programmable System-on-Chip technology.
pulse width
modulator (PWM)
An output in the form of duty cycle which varies as a function of the applied measurand
RAM An acronym for random access memory. A data-storage device from which data can be read out and new data
can be written in.
register A storage device with a specific capacity, such as a bit or byte.
reset A means of bringing a system back to a know state. See hardware reset and software reset.
ROM An acronym for read only memory. A data-storage device from which data can be read out, but new data cannot
be written in.
serial 1. Pertaining to a process in which all events occur one after the other.
2. Pertaining to the sequential or consecutive occurrence of two or more related activities in a single device or
channel.
settling time The time it takes for an output signal or value to stabilize after the input has changed from one value to another.
shift register A memory storage device that sequentially shifts a word either left or right to output a stream of serial data.
slave device A device that allows another device to control the timing for data exchanges between two devices. Or when
devices are cascaded in width, the slave device is the one that allows another device to control the timing of data
exchanges between the cascaded devices and an external interface. The controlling device is called the master
device.
16. Glossary (continued)