MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 462
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
binary — Relating to the base 2 number system.
binary number system — The base 2 number system, having two digits, 0 and 1. Binary
binary-coded decimal (BCD) — A notation that uses 4-bit binary numbers to represent the 10
bit — A binary digit. A bit has a value of either logic 0 or logic 1.
branch instruction — An instruction that causes the CPU to continue processing at a memory
break module — The break module allows software to halt program execution at a
breakpoint — A number written into the break address registers of the break module. When a
break interrupt — A software interrupt caused by the appearance on the internal address bus
bus — A set of wires that transfers logic signals.
bus clock — See "CPU clock".
byte — A set of eight bits.
CAN — See "Motorola scalable CAN."
CCR — See “condition code register.”
central processor unit (CPU) — The primary functioning unit of any computer system. The
Technical Data
462
arithmetic is convenient in digital circuit design because digital circuits have two
permissible voltage levels, low and high. The binary digits 0 and 1 can be interpreted to
correspond to the two digital voltage levels.
decimal digits and that retains the same positional structure of a decimal number. For
example,
234 (decimal) = 0010 0011 0100 (BCD)
location other than the next sequential address.
programmable point in order to enter a background routine.
number appears on the internal address bus that is the same as the number in the break
address registers, the CPU executes the software interrupt instruction (SWI).
of the same value that is written in the break address registers.
CPU controls the execution of instructions.
Glossary
MC68HC912DT128A — Rev 4.0
MOTOROLA
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