s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 319

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

pull — An instruction that copies into the accumulator the contents of a stack RAM location. The stack
pullup — A transistor in the output of a logic gate that connects the output to the logic 1 voltage of the
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 signal with
push — An instruction that copies the contents of the accumulator to the stack RAM. The stack RAM
PWM period — The time required for one complete cycle of a PWM waveform.
RAM — Random access memory. All RAM locations can be read or written by the CPU. The contents of
RC circuit — A circuit consisting of capacitors and resistors having a defined time constant.
read — To copy the contents of a memory location to the accumulator.
register — A circuit that stores a group of bits.
reserved memory location — A memory location that is used only in special factory test modes. Writing
reset — To force a device to a known condition.
ROM — Read-only memory. A type of memory that can be read but cannot be changed (written). The
SCI — See "serial communication interface module (SCI)."
serial — Pertaining to sequential transmission over a single line.
serial communications interface module (SCI) — A module in the M68HC08 Family that supports
serial peripheral interface module (SPI) — A module in the M68HC08 Family that supports
set — To change a bit from logic 0 to logic 1; opposite of clear.
shift register — A chain of circuits that can retain the logic levels (logic 1 or logic 0) written to them and
signed — A binary number notation that accommodates both positive and negative numbers. The most
software — Instructions and data that control the operation of a microcontroller.
Freescale Semiconductor
RAM address is in the stack pointer.
power supply.
a constant frequency.
address is in the stack pointer.
a RAM memory location remain valid until the CPU writes a different value or until power is turned
off.
to a reserved location has no effect. Reading a reserved location returns an unpredictable value.
contents of ROM must be specified before manufacturing the MCU.
asynchronous communication.
synchronous communication.
that can shift the logic levels to the right or left through adjacent circuits in the chain.
significant bit is used to indicate whether the number is positive or negative, normally logic 0 for
positive and logic 1 for negative. The other seven bits indicate the magnitude of the number.
MC68HC908AZ32A Data Sheet, Rev. 2
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