Hardware Description

3.22.2ChipScope integrated logic analyzer

The ChipScope connector (J33) enables you to connect a ChipScope compatible analyzer to the configuraion scan chain while a JTAG debugger is connected to the debug scan chain. This enables you to debug the FPGAs on stacked tiles while examining code on the CPU.

Note

In debug mode:

the ChipScope connector is enabled

the FPGA on the baseboard is excluded from the configuration scan chain. In configuration mode:

the ChipScope connector is disabled

the FPGA on the baseboard is included in the configuration scan chain.

See JTAG signal routing on page 3-102 and RealView Logic Tile JTAG circuitry on page 3-103 for full routing details.

For more details on the integrated logic analyzer, see the ChipScope details on the

Xilinx website (www.xilinx.com).

3.22.3Embedded trace support

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 Trace connector on the PB926EJ-S. To trace program flow, the ETM broadcasts branch addresses, data accesses, and status information through the trace port. Later in the debug process, the complete instruction flow can be reconstructed by the ARM Trace Debug Tools (TDT) or RealView Debugger. The ETM9 in the ARM926EJ-S PXP Development Chip is a medium size ETM9 Rev 2a.

Note

Connection of the trace port analyzer is described in Connecting the Trace Port

Analyzer on page 2-10.

3-104

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ARM DUI 0224I

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ARM ARM DUI 0224I manual ChipScope integrated logic analyzer, Embedded trace support