MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 466
MC68HC12
Manufacturer Part Number
MC68HC12
Description
The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC12.pdf
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Glossary
latch — A circuit that retains the voltage level (logic 1 or logic 0) written to it for as long as power
latency — The time lag between instruction completion and data movement.
least significant bit (LSB) — The rightmost digit of a binary number.
logic 1 — A voltage level approximately equal to the input power voltage (V
logic 0 — A voltage level approximately equal to the ground voltage (V
low byte — The least significant eight bits of a word.
M68HC12 — A Motorola family of 16-bit MCUs.
mark/space — The logic 1/logic 0 convention used in formatting data in serial communication.
mask — 1. A logic circuit that forces a bit or group of bits to a desired state. 2. A photomask used
MCU — Microcontroller unit. See “microcontroller.”
memory location — Each M68HC12 memory location holds one byte of data and has a unique
memory map — A pictorial representation of all memory locations in a computer system.
MI-Bus — See "Motorola interconnect bus".
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
most significant bit (MSB) — The leftmost digit of a binary number.
Technical Data
466
is applied to the circuit.
in integrated circuit fabrication to transfer an image onto silicon.
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.
Glossary
MC68HC912DT128A — Rev 4.0
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MOTOROLA
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