Motorola MVME187 User Manual
1-4
Introduction to the MVME187 Installation Guide
1
Control and Status Bit Definitions
The terms control bit and status bit are used extensively in this
document to describe certain bits in registers.
document to describe certain bits in registers.
❏
The status bit can be read by software to determine
operational or exception conditions.
operational or exception conditions.
True/False Bit State Definitions
True and False indicate whether a bit enables or disables the
function it controls:
function it controls:
Bit Value Descriptions
In all tables, the terms 0 and 1 are used to describe the actual value
that should be written to the bit, or the value that it yields when
read.
that should be written to the bit, or the value that it yields when
read.
Term
Describes
Control bit
The bit can be set and cleared under software
control
control
.
Status bit
The bit reflects a specific condition
.
Term
Indicates
True
Enables the function it controls.
False
Disables the function it controls.