MC68HC708MP16 Datasheet, PDF (387/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Glossary
EEPROM — Electrically erasable, programmable, read-only memory. A
non-volatile type of memory that can be electrically reprogrammed.
EPROM — Erasable, programmable, read-only memory. A non-volatile
type of memory that can be erased by exposure to an ultraviolet light
source and then reprogrammed.
exception — An event such as an interrupt or a reset that stops the
sequential execution of the instructions in the main program.
external interrupt module (IRQ) — A module in the M68HC08 Family
with both dedicated external interrupt pins and port pins that can be
enabled as interrupt pins.
fetch — To copy data from a memory location into the accumulator.
firmware — Instructions and data programmed into non-volatile
memory.
free-running counter — A device that counts from zero to a
predetermined number, then rolls over to zero and begins counting
again.
full-duplex transmission — Communication on a channel in which
data can be sent and received simultaneously.
H — The upper byte of the 16-bit index register (H:X) in the CPU08.
H — The half-carry bit in the condition code register of the CPU08. This
bit indicates a carry from the low-order four bits of the accumulator
value to the high-order four bits. The half-carry bit is required for
binary-coded decimal arithmetic operations. The decimal adjust
accumulator (DAA) instruction uses the state of the H and C bits to
determine the appropriate correction factor.
hexadecimal — Base 16 numbering system that uses the digits 0
through 9 and the letters A through F.
high byte — The most significant eight bits of a word.
illegal address — An address not within the memory map
illegal opcode — A non-existent opcode.
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor
Glossary
Technical Data
387