CY8C20X34 CYPRESS [Cypress Semiconductor], CY8C20X34 Datasheet - Page 203

• Manufacturer Part Number: CY8C20X34
• Description: Technical Reference Manual (TRM)
• Manufacturer: CYPRESS [Cypress Semiconductor]

PSoC CY8C20x34 TRM, Version 1.0
hexidecimal
high time
I
I2C
ICE
idle state
impedance
input
input/output (IO)
instruction
integrated circuit (IC)
interface
A base 16 numeral system (often abbreviated and called hex), usually written using the symbols
0-9 and A-F. It is a useful system in computers because there is an easy mapping from four bits
to a single hex digit. Thus, one can represent every byte as two consecutive hexadecimal digits.
Compare the binary, hex, and decimal representations:
bin
0000b =
0001b =
0010b =
...
1001b =
1010b =
1011b =
...
1111b
So the decimal numeral 79 whose binary representation is 0100 1111b can be written as 4Fh in
hexadecimal (0x4F).
The amount of time the signal has a value of ‘1’ in one period, for a periodic digital signal.
A two-wire serial computer bus by Philips Semiconductors. I2C is an inter-integrated circuit. It is
used to connect low-speed peripherals in an embedded system. The original system was cre-
ated in the early 1980s as a battery control interface, but it was later used as a simple internal
bus system for building control electronics. I2C uses only two bi-directional pins, clock and data,
both running at +5V and pulled high with resistors. The bus operates at 100 kbits/second in stan-
dard mode and 400 kbits/second in fast mode. I
tors.
The in-circuit emulator that allows users to test the project in a hardware environment, while
viewing the debugging device activity in a software environment (PSoC Designer).
A condition that exists whenever user messages are not being transmitted, but the service is
immediately available for use.
1. The resistance to the flow of current caused by resistive, capacitive, or inductive devices in a
2. The total passive opposition offered to the flow of electric current. Note the impedance is
A point that accepts data in a device, process, or channel.
A device that introduces data into or extracts data from a system.
An expression that specifies one operation and identifies its operands, if any, in a programming
language such as C or assembly.
A device in which components such as resistors, capacitors, diodes, and transistors are formed
on the surface of a single piece of semiconductor.
The means by which two systems or devices are connected and interact with each other.
circuit.
determined by the particular combination of resistance, inductive reactance, and capacitive
reactance in a given circuit.
=
=
hex
0x0
0x1
0x2
0x9
0xA
0xB
0xF
=
=
=
=
=
=
=
=
dec
0
1
2
9
10
11
15
2
C™ is a trademark of the Philips Semiconduc-
Section F: Glossary
203