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SECTION 20
DEVELOPMENT CAPABILITIES AND INTERFACE
This section discusses the on-chip features that are used during the development phase.
Background debug monitors and emulators are used to interface with this MPC823e
capability. Emulators require a level of control and observation that are in sharp contrast to
the trend of modern microcomputers and microprocessors in which many bus cycles are
directed to internal resources and are not externally visible. The same is true for bus
analyzers. To enhance support for development tools, some of the development support
functions are implemented in the silicon. Program flow tracking, watchpoint and breakpoint
generation, and emulation systems that control core activity are just some of the features
that allow you to efficiently debug systems based on the MPC823e.
20.1 FEATURES
The following list summarizes the development features of the MPC823e:
• Program Flow Tracking
Instruction show cycles
Data show cycles
Branching
Exception trap
• Watchpoint and Breakpoint Generation
Four hardware breakpoints
Five watchpoint sources
• Simple Hardware Interface
High-speed data interface
Internal status pins
Freeze indication
• Rich Control Register Set
MOTOROLA
MPC823e REFERENCE MANUAL
20-1
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