Assertion And Negation Conventions; Data And Address Size Deþnitions; Big-Endian Byte Ordering - Motorola MVME187 Installation Manual

Assertion and Negation Conventions

Assertion and negation are used to specify forcing a signal to a
particular state. These terms are used independently of the voltage
level (high or low) that they represent.
Assertion and assert
Negation and negate
Data and Address Size Definitions
Data and address sizes are defined as follows:
Name
Byte
Two-byte
Four-byte

Big-Endian Byte Ordering

This manual assumes that the MPU on the MVME187 always
programs the CMMUs with big-endian byte ordering, as shown
below. Any attempt to use little-endian byte ordering will
immediately render the MVME187Bug debugger unusable.
31
ADR0
Terminology, Conventions, and Definitions Used in this Manual
Term
The signal is active or true.
The signal is inactive or false.
Size Numbered
8 bits 0 through 7
16 bits 0 through 15
32 bits 0 through 31
BIT
24 23 16
ADR1
Indicates
SigniÞcance
bit 0 is the
least
signiÞcant
bit 0 is the
least
signiÞcant
bit 0 is the
least
signiÞcant
BIT
15 08 07
ADR2 ADR3
1
Called
half-
word
word
00
1-3