mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 445

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

input/output (I/O) — Input/output interfaces between a computer system and the external world.
instructions — Operations that a CPU can perform. Instructions are expressed by programmers
inter-IC bus (I
interrupt — A temporary break in the sequential execution of a program to respond to signals
interrupt request — A signal from a peripheral to the CPU intended to cause the CPU to
I/O — See “input/output (I/0).”
jitter — Short-term signal instability.
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.”
MC68HC912DG128 — Rev 3.0
MOTOROLA
A CPU reads an input to sense the level of an external signal and writes to an output to
change the level on an external signal.
as assembly language mnemonics. A CPU interprets an opcode and its associated
operand(s) and instruction.
of data exchange between devices.
from peripheral devices by executing a subroutine.
execute a subroutine.
is applied to the circuit.
in integrated circuit fabrication to transfer an image onto silicon.
2
C) — A two-wire, bidirectional serial bus that provides a simple, efficient method
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