MC912DG128A Motorola, MC912DG128A Datasheet - Page 391

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

CAN — See "Motorola scalable CAN."
CCR — See “condition code register.”
central processor unit (CPU) — The primary functioning unit of any computer system. The
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) — The CGM module generates a base clock signal from which
comparator — A device that compares the magnitude of two inputs. A digital comparator defines
computer operating properly module (COP) — A counter module that resets the MCU if
condition code register (CCR) — An 8-bit register in the CPU that contains the interrupt mask
control bit — One bit of a register manipulated by software to control the operation of the
control unit — One of two major units of the CPU. The control unit contains logic functions that
MOTOROLA
CPU controls the execution of instructions.
the system clocks are derived. The CGM may include a crystal oscillator circuit and/or
phase-locked loop (PLL) circuit.
the equality or relative differences between two binary numbers.
allowed to overflow.
bit and five bits that indicate the results of the instruction just executed.
module.
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.
Glossary
MC68HC912DT128A Rev 1.0
Glossary
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