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ADSP-21363SKSQZENG Datasheet(PDF) 8 Page - Analog Devices |
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ADSP-21363SKSQZENG Datasheet(HTML) 8 Page - Analog Devices |
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8 / 44 page  Rev. PrA | Page 8 of 44 | September 2004 ADSP-21363 Preliminary Technical Data a wide trace for the analog ground (AVSS) signal and install a decoupling capacitor as close as possible to the pin. Note that the AVSS and AVDD pins specified in Figure 4 are inputs to the processor and not the analog ground plane on the board. Target Board JTAG Emulator Connector Analog Devices DSP Tools product line of JTAG emulators uses the IEEE 1149.1 JTAG test access port of the ADSP-21363 pro- cessor to monitor and control the target board processor during emulation. Analog Devices DSP Tools product line of JTAG emulators provides emulation at full processor speed, allowing inspection and modification of memory, registers, and proces- sor stacks. The processor's JTAG interface ensures that the emulator will not affect target system loading or timing. For complete information on Analog Devices’ SHARC DSP Tools product line of JTAG emulator operation, see the appro- priate “Emulator Hardware User's Guide”. DEVELOPMENT TOOLS The ADSP-21363 is supported with a complete set of CROSSCORE® software and hardware development tools, including Analog Devices emulators and VisualDSP++® devel- opment environment. The same emulator hardware that supports other SHARC processors also fully emulates the ADSP-21363. The VisualDSP++ project management environment lets pro- grammers develop and debug an application. This environment includes an easy to use assembler (which is based on an alge- braic syntax), an archiver (librarian/library builder), a linker, a loader, a cycle-accurate instruction-level simulator, a C/C++ compiler, and a C/C++ runtime library that includes DSP and mathematical functions. A key point for these tools is C/C++ code efficiency. The compiler has been developed for efficient translation of C/C++ code to DSP assembly. The SHARC has architectural features that improve the efficiency of compiled C/C++ code. The VisualDSP++ debugger has a number of important fea- tures. Data visualization is enhanced by a plotting package that offers a significant level of flexibility. This graphical representa- tion of user data enables the programmer to quickly determine the performance of an algorithm. As algorithms grow in com- plexity, this capability can have increasing significance on the designer’s development schedule, increasing productivity. Sta- tistical profiling enables the programmer to non intrusively poll the processor as it is running the program. This feature, unique to VisualDSP++, enables the software developer to passively gather important code execution metrics without interrupting the real-time characteristics of the program. Essentially, the developer can identify bottlenecks in software quickly and effi- ciently. By using the profiler, the programmer can focus on those areas in the program that impact performance and take corrective action. Debugging both C/C++ and assembly programs with the VisualDSP++ debugger, programmers can: • View mixed C/C++ and assembly code (interleaved source and object information) • Insert breakpoints • Set conditional breakpoints on registers, memory, and stacks • Trace instruction execution • Perform linear or statistical profiling of program execution • Fill, dump, and graphically plot the contents of memory • Perform source level debugging • Create custom debugger windows The VisualDSP++ IDDE lets programmers define and manage DSP software development. Its dialog boxes and property pages let programmers configure and manage all of the SHARC devel- opment tools, including the color syntax highlighting in the VisualDSP++ editor. This capability permits programmers to: • Control how the development tools process inputs and generate outputs • Maintain a one-to-one correspondence with the tool’s command line switches The VisualDSP++ Kernel (VDK) incorporates scheduling and resource management tailored specifically to address the mem- ory and timing constraints of DSP programming. These capabilities enable engineers to develop code more effectively, eliminating the need to start from the very beginning, when developing new application code. The VDK features include Threads, Critical and Unscheduled regions, Semaphores, Events, and Device flags. The VDK also supports Priority-based, Preemptive, Cooperative, and Time-Sliced scheduling approaches. In addition, the VDK was designed to be scalable. If the application does not use a specific feature, the support code for that feature is excluded from the target system. Because the VDK is a library, a developer can decide whether to use it or not. The VDK is integrated into the VisualDSP++ development environment, but can also be used via standard command line tools. When the VDK is used, the development environment assists the developer with many error-prone tasks and assists in managing system resources, automating the gen- eration of various VDK based objects, and visualizing the system state, when debugging an application that uses the VDK. VisualDSP++ Component Software Engineering (VCSE) is Analog Devices’ technology for creating, using, and reusing software components (independent modules of substantial functionality) to quickly and reliably assemble software applica- tions. Download components from the Web and drop them into Figure 4. Analog Power (AVDD) Filter Circuit VDDINT AVDD AVSS 0.01 F 0.1 F 10 |
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