Freescale Semiconductor, Inc.
Designer Reference Manual — DRM019
Appendix B. Glossary
AC — Alternating Current
ACIM — AC Induction Motor
ADC — Analogue-to-Digital Converter
BLDC — brushless DC motor
DC — Direct Current
DT — see “Dead Time (DT)”
DTC — Dead Time Correction, see “Dead Time (DT)”
Dead Time (DT) — short time that must be inserted between the turning
off of one transistor in the inverter half bridge and turning on of the
complementary transistor due to the limited switching speed of the
transistors.
duty cycle — A ratio of the amount of time the signal is on versus the
time it is off. Duty cycle is usually represented by a percentage.
interrupt — A temporary break in the sequential execution of a program
to respond to signals from peripheral devices by executing a subroutine.
input/output (I/O) — Input/output interfaces between a computer
system and the external world. A CPU reads an input to sense the level
of an external signal and writes to an output to change the level on an
external signal.
logic 1 — A voltage level approximately equal to the input power voltage
(VDD).
logic 0 — A voltage level approximately equal to the ground voltage
(VSS).
DRM019 — Rev 0
MOTOROLA
Designer Reference Manual
Glossary
63
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