MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 359

• Manufacturer Part Number: MC68HC708XL36
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

phase-locked loop (PLL) — A oscillator circuit in which the frequency of the oscillator is
PLL — See "phase-locked loop (PLL)."
pointer — Pointer register. An index register is sometimes called a pointer register because its
polarity — The two opposite logic levels, logic 1 and logic 0, which correspond to two different
polling — Periodically reading a status bit to monitor the condition of a peripheral device.
port — A set of wires for communicating with off-chip devices.
prescaler — A circuit that generates an output signal related to the input signal by a fractional
program — A set of computer instructions that cause a computer to perform a desired operation
program counter (PC) — A 16-bit register in the CPU08. The PC register holds the address of
pull — An instruction that copies into the accumulator the contents of a stack RAM location. The
pullup — A transistor in the output of a logic gate that connects the output to the logic 1 voltage
pulse-width — The amount of time a signal is on as opposed to being in its off state.
pulse-width modulation (PWM) — Controlled variation (modulation) of the pulse width of a
push — An instruction that copies the contents of the accumulator to the stack RAM. The stack
PWM period — The time required for one complete cycle of a PWM waveform.
MOTOROLA
synchronized to a reference signal.
contents are used in the calculation of the address of an operand, and therefore points to
the operand.
voltage levels, V
scale factor such as 1/2, 1/8, 1/10 etc.
or operations.
the next instruction or operand that the CPU will use.
stack RAM address is in the stack pointer.
of the power supply.
signal with a constant frequency.
RAM address is in the stack pointer.
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Glossary
MC68HC708XL36
Glossary
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