Motorola MPC823e User Manual

Development Capabilities and Interface
20-16 MPC823e REFERENCE MANUAL MOTOROLA
DEVELOPMENT
20
CAPABILITIES & INTERFACE
20.3.2 Basic Operation
20.3.2.1 INSTRUCTION SUPPORT. There are four instruction address comparators (A, B,
C, and D). Each one is 30 bits long and generates two output events—equal to and less
than. These signals generate one of four events—equal to, not equal to, greater than, or less
than. The instruction watchpoints and breakpoint are generated with these events according
to your programming. Using the OR option enables “out of range” detect.
Figure 20-3. Instruction Support General Structure
COMPARE
TYPE
LOGIC
COMPARE
TYPE
LOGIC
COMPARE
TYPE
LOGIC
COMPARATOR
EQ
LT
COMPARE TYPE
COMPARATOR
EQ
LT
COMPARATOR
EQ
LT
COMPARATOR
EQ
LT
EVENTS GENERATOR
AND-OR
LOGIC
CONTROL BITS
A
B
(A&B)
(A | B)
C
D
(C&D)
(C | D)
I - WATCHPOINT 0
I - WATCHPOINT 1
I - BREAKPOINT
I - WATCHPOINT 2
I - WATCHPOINT 3
COMPARE
TYPE
LOGIC
B
C
D
A

Motorola MPC823e Specifications

General

Brand	Motorola
Model	MPC823e
Category	Computer Hardware
Language	English