Datasheet

Glossary
MC9S12DP256 — Revision 1.1
Glossary
B — See “accumulators (A and B or D).”
baud rate — The total number of bits transmitted per unit of time.
BCD — See “binary-coded decimal (BCD).”
binary — Relating to the base 2 number system.
binary number system — The base 2 number system, having two
digits, 0 and 1. Binary 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.
binary-coded decimal (BCD) — A notation that uses 4-bit binary
numbers to represent the 10 decimal digits and that retains the
same positional structure of a decimal number. For example,
234 (decimal) = 0010 0011 0100 (BCD)
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 location other than the next sequential
address.
break module — The break module allows software to halt program
execution at a programmable point in order to enter a background
routine.
breakpoint — A number written into the break address registers of the
break module. When a 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).
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