MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 360

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

Glossary
RAM — Random access memory. All RAM locations can be read or written by the CPU. The
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
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).
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
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
signed — A binary number notation that accommodates both positive and negative numbers.
software — Instructions and data that control the operation of a microcontroller.
MC68HC708XL36
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contents of a RAM memory location remain valid until the CPU writes a different value or
until power is turned off.
modes. Writing to a reserved location has no effect. Reading a reserved location returns
an unpredictable value.
The contents of ROM must be specified before manufacturing the MCU.
supports asynchronous communication.
synchronous communication.
them and that can shift the logic levels to the right or left through adjacent circuits in the
chain.
The most 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.
Freescale Semiconductor, Inc.
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Glossary
MOTOROLA