Norwood, mass. " Analog Devices newest SHARC DSP is said to address the market's requirements for floating-point signal processing at the lowest system cost.
Sampling now, the ADSP-21262 at 200 MHz is priced at $14.95 in quantities of 10,000 and is offered in a 12x12 mm 136-ball BGA package and as a 22x22 mm 144-lead LQFP package. The ADSP-21262 processor is code-compatible with all existing SHARC DSPs.
This first member of ADI's third-generation SHARC DSP family is aimed at such applications as high-quality audio and automotive entertainment systems, voice recognition, medical appliances and measurement devices boasts the integration of large on-chip memory with a wide variety of peripherals, thereby speeding time to market and keeping costs low.
The ADSP-21262 supports execution of 32-bit fixed-point and 32/40-bit floating-point arithmetic formats. With its core running at 200 MHz, the DSP is capable of executing complex Fast Fourier Transform operations " 1024-point complex FFT in 46 microseconds, which ADI says is more than 2.6 times faster than comparatively priced processors.
In audio applications, the single-instruction, multiple data (SIMD) mode effectively doubles the processor performance.
The ADSP-21262 is designed with the highest level of integration, including 2 Mbit of on-chip dual-ported SRAM and 4 Mbit of mask programmable ROM memory. This large on-chip dual-ported memory enables sustained processor and I/O performance, without the need for external memory. System I/O is achieved through six full-duplex serial ports, four timers, a 16-bit parallel port, a serial peripheral interface, 22 zero-overhead Direct Memory Access (DMA) channels delivering fast data transfers without processor intervention and the Digital Applications Interface (DAI) offering complete software control through its Signal Routing Unit (SRU).
Large memory and high functionality (Click on image to enlarge)
Connections are made using the flexible Signal Routing Unit (SRU), a matrix routing group of pins that provides configurable and flexible connectivity between all DAI components and the SRU. The peripherals connected through the DAI are: a precision clock generator (PCG), an input data port (IDP), six SPORTS (serial ports), flags, interrupt pins, three timers and the SRU.
The IDP provides an additional input path to the DSP core, configurable as 8 channels of receive serial data or as 7 channels of receive serial data and a single channel of up to a 20-bit wide parallel data. This level of integration enables the designer to take full advantage of a wide variety of peripherals without sacrificing the overall system performance.
The ADSP-21262 is a fully programmable processor that is supported by ADI's CROSSCORE development tools platform.
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