PXN20RM Datasheet, PDF (1253/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Nexus Development Interface (NDI)
Class 1
Mandatory
feature
Static Debug
r/w regs & mem
start/stop processor
enter/exit debug mode
Set break-/watchpoints
Watchpoint messaging
Optional
feature
Class 2
Ownership trace
Program Trace
Port replacement
Class 3
Data trace (write only)
Dynamic memory r/w
Data trace (read/write)
Data acquisition
Class 4
Complex triggering
Memory substitution
Ext. mem. substitution
Figure 36-80. Nexus Debug Classifications
The PXN20 supports the Class 2+ and Class 3 debug features listed in Table 36-68
Table 36-68. Debug Requirements
Feature
Static debug
Set breakpoints/watchpoints
Watchpoint messaging
Ownership trace
Program trace (BTM)
Port replacement
Data trace (write only)
Dynamic memory read/write
Data trace (read/write)
Data acquisition
Memory substitution
Complex triggering
External memory substitution
Class 1 Class 2 Class 2+ Class 3 Class 3+ Class 4
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
—
X
X
X
X
X
—
X
X
X
X
X
— optional — optional optional optional
—
—
—
X
X
X
—
—
X
X
X
X
—
—
— optional optional optional
—
—
— optional optional optional
—
—
—
—
—
X
—
—
X
—
X
X
—
—
—
—
— optional
These debug capabilities are available at room temperature (25° C) and high temperature (125° C) when
the PXN20 is at maximum speed.
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
36-103