AN2667 Freescale Semiconductor / Motorola, AN2667 Datasheet - Page 11

• Manufacturer Part Number: AN2667
• Description: Multi-Controller Hardware Development for the MPC5xx Family
• Manufacturer: Freescale Semiconductor / Motorola

Units are numbered from the point of connection downwards. Only the top most unit in
the stack requires a connection to the host PC and this is the one that must be
powered. Applying a power supply to other units in the chain will cause problems on the
PODBus.
MOTOROLA
The following applies to the MPC56x when using Lauterbach TRACE32. Lauterbach
was used for the development of this apps note however any other toolchain could
be used.
NEXUS will not work with Risc Trace as per the diagram above. PowerTrace
modules (from Lauterbach) are needed in order to take advantage of the NEXUS
capabilities. If the user is content using BDM debugging then PowerDebug modules
should be used. This gives three possible combinations for a debug system:
With the USE= bitmask in the TRACE32 config files, PowerTrace is 1 bit wide and
PowerDebug is two bits wide therefore the USE lines for each configuration above
would be:
1)
2)
3)
1)
2)
3)
PowerDebug(Device 1) : PowerDebug(Device 2)
PowerDebug(Device 1) : PowerTrace(Device 2)
PowerTrace (Device 1) : PowerTrace(Device 2)
USE=1100, USE=0011
USE=110, USE=001 (or USE=100, USE=011)
USE=10, USE=01
Multi-Controller Hardware Development for the MPC5xx Family
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Figure 3.4
Note
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