CY8C21345 Datasheet, PDF (29/35 Pages) Cypress Semiconductor – PSoC Programmable System-on-Chip

CY8C21345
CY8C22345, CY8C22545
Document Conventions
Units of Measure
Table 33 lists the units of measures.
Table 33. Units of Measure
Symbol
kB
°C
kHz
kΩ
LSB
MHz
µA
µs
µV
mA
mm
ms
Unit of Measure
1024 bytes
degree Celsius
kilohertz
kilohm
least significant bit
megahertz
microampere
microsecond
microvolts
milliampere
millimeter
millisecond
Symbol
mV
nA
ns
W
%
pF
ps
sps
pA
V
µW
W
Unit of Measure
millivolts
nanoampere
nanosecond
ohm
percent
picofarad
picosecond
samples per second
pikoampere
volts
microwatts
watt
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’ or ‘b’ are decimals.
Glossary
active high
5. A logic signal having its asserted state as the logic 1 state.
6. 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 A device that changes an analog signal to a digital signal of corresponding magnitude. Typically,
(ADC)
an ADC converts a voltage to a digital number. The digital-to-analog (DAC) converter performs
the reverse operation.
API (Application A series of software routines that comprise an interface between a computer application and
Programming lower level services and functions (for example, user modules and libraries). APIs serve as
Interface)
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.
Document Number: 001-43084 Rev. *L
Page 29 of 35
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