ADSP-21364 EZ-KIT Lite Hardware Reference

SPI Disable Switch (SW8)

The SPI interface switch (SW8) disables the SPI chip select lines connected to the SPI flash memory and the AD1835A audio codec. The switch also disables the ADC_LRCLK and ADC_BCLK signals on the AD1835A device. The switch allows a customer to re-use the same pins on the SPI interface and on the expansion interface. The SW8 default is all positions ON unless any of the switch signals or the SPI interface signals are used on the expansion connector or via an EZ-Extender®.

Push Button Enable Switch (SW9)

The push button enable switch (SW9) disconnects the push buttons from the corresponding processor pins. This allows the signals to be used else- where on the board. Table 2-3shows the SW9 connections. By default, all of the switch positions are ON.

Table 2-3. Push Button Enable Switch (SW9) Connections

Switch Position

Push Button Reference Designator

Processor Pin

 

 

 

 

 

 

1

SW1

FLAG1

 

 

 

2

SW2

FLAG2

 

 

 

3

SW3

DAI_P19

 

 

 

4

SW4

DAI_P20

 

 

 

Position 6 of SW9 connects or disconnects the latch-enable pin of the LED to the logical OR of the ~WE and ~LED_CS signals. When position 6 is OFF, the latch-enable pin of the LED latch (U24) is pulled high, making the latch transparent. In this position, the value of the LEDs is directly con- nected to AD7–0.

ADSP-21364 EZ-KIT Lite Evaluation System Manual

2-11

Page 45
Image 45
Analog Devices ADSP-21364 system manual SPI Disable Switch SW8, Push Button Enable Switch SW9

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.