Using ADSP-21364 EZ-KIT Lite

opposed to the on-board oscillator, allows synchronization of multiple devices in the system. This is done on the EZ-KIT Lite when data is com- ing from the S/PDIF receiver and being output through the audio codec. The S/PDIF MCLK is routed to the AD1835A MCLK in the processor’s signal routing unit (SRU). It is also necessary to disable the on-board audio oscillator from driving the audio codec and the processor’s input pin. For instructions on how to configure the clock, refer to “Codec Setup Switch (SW7)” on page 2-10.

The AD1835A codec can be configured as a master or as a slave, depend- ing on the DIP switch settings. In master mode, the AD1835A drives the serial port clock and frame sync signals to the processor. In slave mode, the processor must generate and drive all of the serial port clock and frame sync signals. For information on how to set the mode, refer to “Codec Setup Switch (SW7)” on page 2-10.

The AD1835A audio codec’s internal configuration registers are config- ured using the SPI port of the processor. The FLAG3 register is used as the select for the device. For information on how to configure the multichan- nel codec, refer to the codec datasheet, which can be found at

http://www.analog.com/en/prod/0,2877,AD1835A,00.html.

The RCA connector (J4) is used to input analog audio. When using an electret microphone on this connector, configure the SW6 switch according to the instructions in “Electret Microphone Select Switch (SW6)” on page 2-9. The four output channels connect to the RCA connector J5. Channel 4 of the codec connects to the headphone jack J6. For more information, see “Connectors” on page 2-16.

Example programs are included in the EZ-KIT Lite installation directory to demonstrate how to configure and use the board’s analog audio interface.

ADSP-21364 EZ-KIT Lite Evaluation System Manual

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Analog Devices system manual Using ADSP-21364 EZ-KIT Lite

ADSP-21364 specifications

The Analog Devices ADSP-21364 is a high-performance digital signal processor (DSP) specifically designed for demanding applications in audio, industrial, and communications sectors. It is well-regarded for its powerful processing capabilities, extensive connectivity options, and energy efficiency, making it an ideal choice for complex digital signal processing tasks.

One of the standout features of the ADSP-21364 is its dual Harvard architecture, which allows for simultaneous access to program and data memory. This capability significantly improves performance by reducing bottlenecks, enabling faster execution of algorithms. The processor boasts a clock speed of up to 300 MHz, ensuring it can handle a wide range of real-time signal processing tasks.

The ADSP-21364 is equipped with a rich set of on-chip memory resources, including 64KB of program RAM and 64KB of data RAM. This substantial memory allocation enables the storage of intricate algorithms and large datasets, ensuring that high-performance applications can be executed without the need for external memory, thus reducing latency and power consumption.

Another notable feature of this DSP is its advanced multiprocessing capabilities. The processor includes six processing engines, allowing for parallel processing of multiple tasks. This architecture is particularly beneficial for applications that require simultaneous processing of audio signals, such as digital mixing or effects processing, enhancing the overall throughput.

In terms of connectivity, the ADSP-21364 is equipped with a wide range of I/O options, including serial ports, parallel ports, and a high-speed synchronous port. This versatility facilitates seamless integration with other system components, making the processor an excellent choice for embedded systems that rely on external data sources.

The ADSP-21364 also supports various industry-standard digital audio interfaces, such as I2S and TDM, enabling straightforward interfacing with audio codecs and other digital audio devices. Moreover, it features built-in hardware accelerators for efficient filtering, Fast Fourier Transform (FFT), and interpolation tasks, thereby enhancing its ability to handle complex audio signal processing.

On the power consumption front, the ADSP-21364 is designed with energy efficiency in mind. Its architecture allows for low-power operation modes, which are crucial in battery-powered applications where energy conservation is a priority.

In conclusion, the Analog Devices ADSP-21364 DSP is a robust solution for high-performance digital signal processing needs. With its dual Harvard architecture, extensive memory resources, advanced multiprocessing capabilities, versatile connectivity options, and energy-efficient design, it stands out as a premier choice for a variety of applications in the fields of audio processing, telecommunications, and industrial automation.