mc68hc05x4dw Freescale Semiconductor, Inc, mc68hc05x4dw Datasheet - Page 137

• Manufacturer Part Number: mc68hc05x4dw
• Description: Xc68hc705x4 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

clock generator module (CGM) — A module in the M68HC08 Family. The CGM generates a
comparator — A device that compares the magnitude of two inputs. A digital comparator defines
computer operating properly module (COP) — A counter module in the M68HC08 Family that
condition code register (CCR) — An 8-bit register in the CPU08 that contains the interrupt
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
COP — See "computer operating properly module (COP)."
counter clock — The input clock to the TIM counter. This clock is the output of the TIM
CPU — See “central processor unit (CPU).”
CPU08 — The central processor unit of the M68HC08 Family.
CPU clock — The CPU clock is derived from the CGMOUT output from the CGM. The CPU
CPU cycles — A CPU cycle is one period of the internal bus clock, normally derived by dividing
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.
the equality or relative differences between two binary numbers.
resets the MCU if allowed to overflow.
mask 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.
prescaler.
clock frequency is equal to the frequency of the oscillator output, CGMXCLK, divided by
four.
a crystal oscillator source by two or more so the high and low times will be equal. The
length of time required to execute an instruction is measured in CPU clock cycles.
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Glossary
MC68HC0X4 Rev 1.0
Glossary