Notational Conventions And Terminology - Intel 8XC196K Series User Manual

Appendix C — Registers — provides a compilation of all device registers arranged alphabeti-
cally by register mnemonic. It also includes tables that list the windowed direct addresses for all
SFRs in each possible window.
Glossary — defines terms with special meaning used throughout this manual.
Index — lists key topics with page number references.
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NOTATIONAL CONVENTIONS AND TERMINOLOGY

The following notations and terminology are used throughout this manual. The Glossary defines
other terms with special meanings.
#
Assert and Deassert
Clear and Set
Instructions
italics
The pound symbol (#) has either of two meanings, depending on the
context. When used with a signal name, the symbol means that the
signal is active low. When used in an instruction, the symbol prefixes
an immediate value in immediate addressing mode.
The terms assert and deassert refer to the act of making a signal
active (enabled) and inactive (disabled), respectively. The active
polarity (high/low) is defined by the signal name. Active-low signals
are designated by a pound symbol (#) suffix; active-high signals have
no suffix. To assert RD# is to drive it low; to assert ALE is to drive it
high; to deassert RD# is to drive it high; to deassert ALE is to drive it
low.
The terms clear and set refer to the value of a bit or the act of giving
it a value. If a bit is clear, its value is "0"; clearing a bit gives it a "0"
value. If a bit is set, its value is "1"; setting a bit gives it a "1" value.
Instruction mnemonics are shown in upper case to avoid confusion.
You may use either upper case or lower case.
Italics identify variables and introduce new terminology. The context
in which italics are used distinguishes between the two possible
meanings.
Variables in registers and signal names are commonly represented by
x and y, where x represents the first variable and y represents the
second variable. For example, in register Px_MODE.y, x represents
the variable that identifies the specific port, and y represents the
register bit variable [7:0]. Variables must be replaced with the correct
values when configuring or programming registers or identifying
signals.
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