mc68hc05x4dw Freescale Semiconductor, Inc, mc68hc05x4dw Datasheet - Page 141

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

mask option — A optional microcontroller feature that the customer chooses to enable or
mask option register (MOR) — An EPROM location containing bits that enable or disable
MCU — Microcontroller unit. See “microcontroller.”
memory location — Each M68HC08 memory location holds one byte of data and has a unique
memory map — A pictorial representation of all memory locations in a computer system.
microcontroller — Microcontroller unit (MCU). A complete computer system, including a CPU,
modulo counter — A counter that can be programmed to count to any number from zero to its
monitor ROM — A section of ROM that can execute commands from a host computer for testing
MOR — See "mask option register (MOR)."
most significant bit (MSB) — The leftmost digit of a binary number.
multiplexer — A device that can select one of a number of inputs and pass the logic level of that
N — The negative bit in the condition code register of the CPU08. The CPU sets the negative bit
nibble — A set of four bits (half of a byte).
object code — The output from an assembler or compiler that is itself executable machine code,
disable.
certain MCU features.
address. To store information in a memory location, the CPU places the address of the
location on the address bus, the data information on the data bus, and asserts the write
signal. To read information from a memory location, the CPU places the address of the
location on the address bus and asserts the read signal. In response to the read signal,
the selected memory location places its data onto the data bus.
memory, a clock oscillator, and input/output (I/O) on a single integrated circuit.
maximum possible modulus.
purposes.
input on to the output.
when an arithmetic operation, logical operation, or data manipulation produces a negative
result.
or is suitable for processing to produce executable machine code.
Freescale Semiconductor, Inc.
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Go to: www.freescale.com
Glossary
MC68HC0X4 Rev 1.0
Glossary