CY8C20X34 CYPRESS [Cypress Semiconductor], CY8C20X34 Datasheet - Page 210

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

Section F: Glossary
210
T
tap
terminal count
threshold
transistors
tri-state
U
UART
user
user modules
user space
V
Vdd
volatile
Vss
W
watchdog timer
The connection between two blocks of a device created by connecting several blocks/compo-
nents in a series, such as a shift register or resistive voltage divider.
The state at which a counter is counted down to zero.
The minimum value of a signal that can be detected by the system or sensor under consider-
ation.
The transistor is a solid-state semiconductor device used for amplification and switching, and
has three terminals. A small current or voltage applied to one terminal controls the current
through the other two. It is the key component in all modern electronics. In digital circuits, transis-
tors are used as very fast electrical switches, and arrangements of transistors can function as
logic gates, RAM-type memory, and other devices. In analog circuits, transistors are essentially
used as amplifiers.
A function whose output can adopt three states: 0, 1, and Z (high-impedance). The function does
not drive any value in the Z state and, in many respects, may be considered to be disconnected
from the rest of the circuit, allowing another output to drive the same net .
A UART or universal asynchronous receiver-transmitter translates between parallel bits of data
and serial bits.
The person using the PSoC device and reading this manual.
Pre-build, pre-tested hardware/firmware peripheral functions that take care of managing and
configuring the lower level analog and digital PSoC blocks. User modules also provide high level
API (Application Programming Interface) for the peripheral function.
The bank 0 space of the register map. The registers in this bank are more likely to be modified
during normal program execution and not just during initialization. Registers in bank 1 are most
likely to be modified only during the initialization phase of the program.
A name for a power net meaning "voltage drain." The most positive power supply signal. Usually
5 or 3.3 volts.
Not guaranteed to stay the same value or level when not in scope.
A name for a power net meaning "voltage source." The most negative power supply signal.
A timer that must be serviced periodically. If it is not serviced, the CPU will reset after a specified
period of time.
PSoC CY8C20x34 TRM, Version 1.0