Developer Support

PXS20 Product Brief, Rev. 1

Freescale Semiconductor

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The development support provided includes program trace, data trace, watchpoint trace, ownership trace,

registers during halt. The Nexus interface also supports a JTAG only mode using only the JTAG pins. The

following features are implemented:

•

Full and reduced port modes

•

MCKO (message clock out) pin

•

•2 MSEO (message start/end out) pins

•EVTO (event out) pin

— Auxiliary input port

•EVTI (event in) pin

•

5-pin JTAG port (JCOMP, TDI, TDO, TMS, and TCK)

— Supports JTAG mode

•

Host processor (e200) development support features

— Data trace via data write messaging (DWM) and data read messaging (DRM). This allows the

development tool to trace reads or writes, or both, to selected internal memory resources.

— Ownership trace via ownership trace messaging (OTM). OTM facilitates ownership trace by

providing visibility of which process ID or operating system task is activated. An ownership

trace message is transmitted when a new process/task is activated, allowing development tools

to trace ownership flow.

— Program trace via branch trace messaging (BTM). Branch trace messaging displays program

flow discontinuities (direct branches, indirect branches, exceptions, etc.), allowing the

development tool to interpolate what transpires between the discontinuities. Thus, static code

may be traced.

— Watchpoint messaging (WPM) via the auxiliary port

— Watchpoint trigger enable of program and/or data trace messaging

— Data tracing of instruction fetches via private opcodes

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Developer Support

This family of MCUs is suppported by Freescale's Tower Development System as well as a broad set of

advanced debug and runtime software:

•

CodeWarrior

•FreeMaster

•MQX

•

RAppID Init

•

RAppID Toolbox

1. 4 MDO pins on 144 LQFP package, 12 MDO pins on 257 MAPBGA package.