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ARCHITECTURE OF SHARC PROCESSOR PDF

The Super Harvard Architecture Single-Chip Computer (SHARC) is a high performance floating-point and fixed-point DSP from Analog Devices. SHARC is used. Check out the SHARC Processor page at Sweetwater — the world’s leading The Analog Devices Super Harvard Architecture Single-Chip. The SHARC Processor portfolio currently consists of three generations of products SIMD architecture with integrated application-specific system peripherals.

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Figure c illustrates the next level of sophistication, the Super Harvard Architecture.

SHARC Processor Architectural Overview

This is fast enough to transfer the entire text of this book in only 2 milliseconds! These are duplicate registers that can be switched with their counterparts in a single clock cycle. They snarc used for fast context switchingthe ability to handle interrupts quickly.

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Specifically, within a single clock cycle, it can perform a multiply step 11an addition achitecture 12two data moves steps 7 and 9update two circular buffer pointers steps 8 and 10and control the loop step 6. This feature procssor step 4 on our list managing the sample-ready interrupt to be handled very quickly and efficiently.

Digital signal processors Microprocessors Very long instruction word computing. This memory can only be configured for one single size.

Von Neumann guided the mathematics of many important discoveries of the early twentieth architectre. Your laser printer will thank you! This relocated data is called “secondary data” in the illustration.

From Wikipedia, the free encyclopedia. If it was new and exciting, Von Neumann was there! Articles lacking reliable references from September All articles lacking reliable references. First, let’s look at how the instruction cache improves the performance of the Harvard architecture. A system that does not use bit extended floating-point might divide the on-chip memory into two sections, a bit one for code and a bit one for everything archihecture.

By using this site, you agree to the Terms of Use and Privacy Policy. For data transfers between multiple SHARC processors, link processo provide a parallel command interface for faster data movement than is enabled by the processors’ serial peripheral interface SPI.

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In a single clock cycle, data from registers can be passed to the multiplier, data from registers can be passed to the ALU, and the two results returned to any of the 16 registers.

This page was last edited on 27 Juneat Some DSP algorithms are best carried out in stages. Digital Filters Match 2: Please Select a Region. Just as important, dedicated hardware allows these data streams to be transferred directly into memory Direct Memory Access, or DMAwithout having to pass through the CPU’s registers.

Not to be confused with SuperH. This includes datasuch as samples from the input signal and the filter coefficients, as well as program instructionsthe binary codes that go into the program sequencer. For instance, an 80 bit accumulator is built into the multiplier to reduce the round-off error associated with multiple fixed-point math operations.

Analog Devices’ SHARC processor family targets applications ranging from consumer, automotive, and professional audio, to industrial, test and measurement, and medical equipment. However, DSPs are designed to operate with circular buffersand benefit from the extra hardware to manage them efficiently. One of the biggest bottlenecks in executing DSP algorithms is transferring information to and from memory.

Embedded Insights – Embedded Processing Directory – Analog Devices SHARC

As an example, suppose you write an efficient FIR filter program using coefficients. The main buses program memory bus and data sjarc bus are also accessible from outside the chip, o an additional interface to off-chip memory and peripherals.

The first time through a loop, the program instructions must be passed over architecutre program memory bus.

For instance, IIR filters are more stable if implemented as a cascade of biquads a stage containing two poles and up to two zeros. Download this chapter in PDF format Chapter Multiple stages require multiple circular buffers for the fastest operation. Some DSPs have on-board analog-to-digital and digital-to-analog converters, a feature called mixed signal. In this mode, the DAGs are configured to generate bit-reversed addresses into the circular buffers, a necessary part of the FFT architecturd.

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This avoids needing to use precious CPU clock cycles to keep track of how the data are stored. If the loop is executed more than a few times, this overhead will be negligible. There will be extra clock cycles associated with beginning and ending the loop steps 3, 4, 5 and 13, plus moving initial values into place ; however, these tasks are also handled very efficiently. This is how the signals enter and exit the system.

We don’t count the time to transfer the result back to memory, or we assume that it remains in the CPU for additional manipulation such as the sum of products in an FIR filter.

This article relies architecturee much on references to primary sources. These control the addresses sent to the program and data memories, specifying where the information is to be read from or written to. This low power capability makes the ADSPx processors suitable for automotive audio and industrial control segments where low power is a requirement. SHARC processors are or were used because they have offered good floating-point performance per watt.

When two numbers are multiplied, two binary values the numbers must be passed over the data memory bus, while only one binary value the program instruction is passed over the program memory bus. Views Read Edit View history.

SHARC Processor Architectural Overview | Analog Devices

A DMA engine is provided for this. Please Select a Language. Instructions without this operand are generally able to perform two or more operations simultaneously. The data register section of the CPU is used in the same way as in traditional microprocessors.