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2.4. Connecting the Trace Port Analyzer

The ARM926EJ-S PXP Development Chip incorporates an ARM9 Embedded Trace Macrocell (ETM9). This enables you to carry out real-time debugging by connecting external trace equipment to the PB926EJ-S. The ETM9 monitors the program execution and sends a compressed trace to the Trace Port Analyzer (TPA). The TPA buffers this information and transmits it to the debugger where it is decompressed and used to reconstruct the complete instruction flow. The trace size is medium (16-bit packets).

For MultiTrace, connect the TPA to the buffer board and plug the adaptor into the PB926EJ-S as shown in Figure 2.4. MultiTrace requires a Multi-ICE JTAG unit.

Figure 2.4. Example of MultiTrace and JTAG connection

Figure 2.4. Example of MultiTrace and JTAG connection

For RealView Trace, connect the Trace Port Analyzer (TPA) to the adaptor board and plug the adaptor into the PB926EJ-S as shown in Figure 2.4. RealView Trace requires a RealView ICE JTAG unit. The Ethernet and power supply cables connect to the RealView ICE unit.

Figure 2.5. Example of RealView ICE and RealView Trace

Figure 2.5. Example of RealView ICE and RealView Trace

Note

The high-density cable from the RealView ICE box requires a buffer board to connect to the JTAG connector on the PB926EJ-S.

The low-density cable can be used to connect the RealView ICE box directly to the JTAG connector, but this interface operates at lower speed.

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