Datasheet

MC9S12DP256 — Revision 1.1
Glossary
Glossary
Glossary
A — See “accumulators (A and B or D).”
accumulators (A and B or D) — Two 8-bit (A and B) or one 16-bit (D)
general-purpose registers in the CPU. The CPU uses the
accumulators to hold operands and results of arithmetic and logic
operations.
acquisition mode — A mode of PLL operation with large loop
bandwidth. Also see ’tracking mode’.
address bus — The set of wires that the CPU or DMA uses to read and
write memory locations.
addressing mode — The way that the CPU determines the operand
address for an instruction. The M68HC12 CPU has 15 addressing
modes.
ALU — See “arithmetic logic unit (ALU).”
analogue-to-digital converter (ATD) — The ATD module is an
8-channel, multiplexed-input successive-approximation
analog-to-digital converter.
arithmetic logic unit (ALU) — The portion of the CPU that contains the
logic circuitry to perform arithmetic, logic, and manipulation
operations on operands.
asynchronous — Refers to logic circuits and operations that are not
synchronized by a common reference signal.
ATD — See “analogue-to-digital converter”.
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...