MC68HC708MP16 Datasheet, PDF (385/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Glossary
central processor unit (CPU) — The primary functioning unit of any
computer system. The CPU controls the execution of instructions.
CGM — See clock generator module (CGM).
clear — To change a bit from logic 1 to logic 0; the opposite of set.
clock — A square wave signal used to synchronize events in a
computer.
clock generator module (CGM) — A module in the M68HC08 Family.
The CGM generates a base clock signal from which the system
clocks are derived. The CGM may include a crystal oscillator circuit
and/or phase-locked loop (PLL) circuit.
comparator — A device that compares the magnitude of two inputs. A
digital comparator defines the equality or relative differences
between two binary numbers.
computer operating properly module (COP) — A counter module in
the M68HC08 Family that resets the MCU if allowed to overflow.
condition code register (CCR) — An 8-bit register in the CPU08 that
contains the interrupt mask bit and five bits that indicate the results
of the instruction just executed.
control bit — One bit of a register manipulated by software to control
the operation of the module.
control unit — One of two major units of the CPU. The control unit
contains logic functions that synchronize the machine and direct
various operations. The control unit decodes instructions and
generates the internal control signals that perform the requested
operations. The outputs of the control unit drive the execution unit,
which contains the arithmetic logic unit (ALU), CPU registers, and
bus interface.
COP — See computer operating properly module (COP).
counter clock — The input clock to the TIM counter. This clock is an
output of the prescaler sub-module. The frequency of the counter
clock is f_TCNT, and the period is t_TCNT.
CPU — See central processor unit (CPU).
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor
Glossary
Technical Data
385