MPC5534 Frescale, MPC5534 Datasheet - Page 29

• Manufacturer Part Number: MPC5534
• Description: Microcontroller
• Manufacturer: Frescale

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5.18 Nexus
The NDI (Nexus Debug Interface) block provides real-time development support capabilities for the
MPC5534 MCU in compliance with the IEEE-ISTO 5001-2003 standard. This development support is
supplied for MCUs without requiring external address and data pins for internal visibility. The NDI block
is an integration of several individual Nexus blocks that are selected to provide the development support
interface for the MPC5534. The NDI block interfaces to the host processor, eTPU, and internal buses to
provide development support as per the IEEE-ISTO 5001-2003 standard. The development support
provided includes program trace, data trace, watchpoint trace, ownership trace, run-time access to the
MCUs internal memory map and access to the core and eTPU internal registers during halt. The Nexus
interface also supports a JTAG only mode using only the JTAG pins. The following features are
implemented:
Freescale Semiconductor
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15 full duplex pin interface for medium visibility throughput
— reduced port mode (RPM) comprises 4 MDO pins
— Auxiliary output port
1 MCKO (message clock out) pin
4 (message data out) pins
2 MSEO (message start/end out) pins
1 RDY (ready) pin
1 EVTO (event out) pin
— Auxiliary input port
1 EVTI (event in) pin
5 pin JTAG port (JCOMP, TDI, TDO, TMS, and TCK)
— Supports JTAG mode
Host processor (e200) development support features
— IEEE-ISTO 5001-2003 standard Class 3 compliant
— Data trace via data write messaging (DWM) and data read messaging (DRM). This allows the
— Ownership trace via ownership trace messaging (OTM). OTM facilitates ownership trace by
— Program trace via branch trace messaging (BTM). Branch trace messaging displays program
— 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
development tool to trace reads and/or writes to selected internal memory resources.
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.
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.
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MPC5534 Microcontroller Product Brief, Rev. 0.0
Detailed Features
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