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CY8C24894

Document Number: 001-53754 Rev. *F Page 41 of 50

Document Conventions

Units of Measure

The following table lists the units of measure that are used in this document.

Numeric Conventions

Hexadecimal numbers are represented with all letters in uppercase with an appended lowercase ‘h’ (for example, ‘14h’ or ‘3Ah’).

Hexadecimal numbers may also be represented by a ‘0x’ prefix, the C coding convention. Binary numbers have an appended

lowercase ‘b’ (for example, ‘01010100b’ or ‘01000011b’). Numbers not indicated by an ‘h’, ‘b’, or ‘0x’ are in decimal format.

Table 34. Units of Measure

Symbol Unit of Measure Symbol Unit of Measure

C degree Celsius mV

millivolts peak-to-peak

dB decibel nA nanoampere

fF femtofarad ns nanosecond

KB 1024 bytes nV nanovolt

kHz kilohertz  ohm

k kilohm % percent

MHz megahertz pA picoampere

A microampere pF picofarad

s microsecond ps picosecond

V microvolt rt-Hz root hertz

mA milliampere V volt

ms millisecond W watt

mV millivolt

Glossary

active high 1. A logic signal having its asserted state as the logic 1 state.

2. A logic signal having the logic 1 state as the higher voltage of the two states.

analog blocks The basic programmable opamp circuits. These are SC (switched capacitor) and CT (continuous time) blocks.

These blocks can be interconnected to provide ADCs, DACs, multi-pole filters, gain stages, and much more.

analog-to-digital

converter (ADC)

A device that changes an analog signal to a digital signal of corresponding magnitude. Typically, an ADC converts

a voltage to a digital number. The digital-to-analog converter (DAC) performs the reverse operation.

Application

programming

interface (API)

A series of software routines that comprise an interface between a computer application and lower level services

and functions (for example, user modules and libraries). APIs serve as building blocks for programmers that create

software applications.

asynchronous A signal whose data is acknowledged or acted upon immediately, irrespective of any clock signal.

bandgap

reference

A stable voltage reference design that matches the positive temperature coefficient of VT with the negative

temperature coefficient of VBE, to produce a zero temperature coefficient (ideally) reference.

bandwidth 1. The frequency range of a message or information processing system measured in hertz.

2. The width of the spectral region over which an amplifier (or absorber) has substantial gain (or

loss); it is sometimes represented more specifically as, for example, full width at half maximum.

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