Fusion DSPs for IoT and General Purpose DSPFusion DSPs for IoT and General Purpose DSPFusion DSPs for IoT and General Purpose DSP

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Tensilica Fusion DSP Family

Multi-Purpose DSPs for Any Application

Fusion DSP dataplane diagram

No standard processor can meet the varied demands of any type of application, until now. The Cadence Tensilica Fusion family is a scalable range of general purpose DSP processors designed with flexible options to give designers the ability to shape the DSP into exactly what their application needs. 

From ultra-low power, small footprint to compute-intensive, high performance processing, the Tensilica Fusion DSPs are ideal for any SoC application including IoT, Automotive, Mobile, Wearables, Consumer, and much more. 

Based on the 32-bit Xtensa® control processor with market-leading DSP features, including algorithm-specific operations for a fully programmable approach, designers get all of the customization advantages that Tensilica processors are known for, along with incredible flexibility. Tensilica Fusion DSPs can support multiple existing and developing standards, as well as customer specific algorithms.

Designers can use the Xtensa Xplorer GUI for choosing options and configurations, to create an optimal and energy-efficient Fusion DSP specifically suited to their application. With optimized pre-verified options, designers can build thier processor and get up and running quickly, with minimal verification effort, significantly reducing time-to-market.

Tensilica Fusion F1 DSP

A Proven Base Architecture with Lots of Flexibility

The Tensilica Fusion F1 DSP offers low energy, high performance control and signal processing for a broad segment of IoT/wearable markets. This highly configurable architecture is specifically designed to excel at always-on processing - including wake-on-voice and sensor fusion applications - that require a merged controller plus DSP, ultra-low energy, and a small footprint. It can be designed into SoCs for wearable activity monitoring, indoor navigation, context-aware sensor fusion, face trigger, voice trigger, and voice recognition.

Additionally, the Tensilica Fusion F1 DSP is very efficient in running the narrowband wireless communications standards typically associated with IoT device communications, including protocols such as Bluetooth Low Energy, Thread and Zigbee using IEEE 802.15.4, SmartGrid 802.15.4g, Wi-Fi 802.11n and 802.11ah, 2G and LTE Category 0 release 12 and 13, and global navigation satellite systems (GNSS).

Feature Supported Benefits
VLIW Slots 2 Allows two concurrent operations
Fixed-point MACs per Cycle One 32x32
Two 24x24
Two 16x16 (four optional)
Flexible MAC architecture efficiently handles broad set of data types
Accumulator 64-bit
ITU/ETSI Intrinsics Yes Accelerates ITU/ETSI voice codec performance
Circular Buffer Yes Efficiently manage streams of data
Customer-defined Instructions for Further Optimization Yes Extend the ISA to efficiently meet customer requirements
Prefetch for Cache-based Configurations Optional Improves cache memory performance

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Tensilica Fusion G DSPs

General Purpose DSP Family with Exceptional Out-of-the-Box Performance 

The Fusion G DSP Family is an easy to program, general purpose, fixed- and floating-point DSP,  ideal for many general purpose applications in automotive, consumer, IoT and industrial markets. 

The Tensilica Fusion G DSPs are built on the proven Xtensa real-time control processor and have a flexible memory subsystem, optional integrated DMA controller and memory protection unit (MPU), making it an excellent choice for standalone DSP SoC designs. 

The Fusion G DSP family features scalable DSP performance, with a common 128-bit, 4-slot VLIW vector DSP architecture, with high performance 11-stage DSP pipeline. The Fusion G3 has a 128-bit SIMD data path with quad 32-bit integer MACs and quad single precision 32-bit floating-point MACs or Fused Multiply Adds (FMAs). The Fusion G6 scales up performance with a 256-bit SIMD data path and eight 32-bit integer MACs and eight single precision 32-bit floating point MACs or FMAs. The Fusion G DSPs combine their high performance signal processing, with unrivalled configurability and extensibility, allowing customers to meet their most demanding application requirements.

The Fusion G6 offers double the signal processing performance of the Fusion G3, thereby offering a software compatible, scalable performance DSP family, ideal for general purpose compute-intensive DSP applications including radar processing, ADAS sensor fusion, mid- to high-end active noise control and surround sound processing, and low-end image processing.

The Fusion G family provides designers with an easy-to-program general purpose DSPs with exceptional performance right out-of-the-box. The development tools feature a familiar and easy-to-use Eclipse based graphical development environment, with Industry-leading features, including an auto-vectorizing compiler, debugger, code and pipeline profiling. An extensive and optimized DSP software library is included with the tools package that supports easy porting of DSP software. 

Tensilica Fusion G DSP Family Feature Overview

Feature Supported Benefits
128-bit 4-slot VLIW DSP Architecture 4-slots High performance and more DSP processing parallelism
Data Architecture
G3: 128-bit SIMD
G6: 256-bit SIMD
G3: 4-way (32-bit)
G6: 8-way (32-bit)
Scalable SIMD data support, enabling flexible vector processing capabilities
Rich DSP instruction set architecture (ISA) check mark Suitable for many DSP applications
Fixed-point (32-bit) MACs/cycle  G3: 4
 G6: 8
G3: 4x32-bit, 8x16-bit and 16x8-bit MACs/cycle
G6: 8x32-bit, 16x16-bit and 32x8-bit MACs/cycle
Optional single and double precision vector floating point support check mark Flexible floating point support, including half precision conversion operations, for data memory savings
Floating-point single precision (32-bit) FMAs or MACs/cycle  G3: 4
 G6: 8
G3: 16 GFLOPs @ 1GHz
G6: 32 GFLOPs @ 1GHz
Xtensa LX7 based 32-bit control processor check mark Excellent real-time control and compatibility with all Tensilica processors
Optional memory protection unit (MPU) check mark Configurable sizes and protection schemes
Optional integrated direct memory access (iDMA) controller check mark Improve data movement efficiency and hide latencies
Optional ECC/parity check mark On L1 instruction and data caches/memories, and the system bus
Auto-vectorizing compiler plus software DSP library check mark Easy C programming, high performance 'out-of-the-box' with easy code portability
Scatter/gather/histogram supported operations check mark Support for low-end image processing and pattern recognition

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Hardware Design and Software Development Tools

Port C to FFT

Port Software Quickly in C

A key advantage of the Fusion DSPs are that they use a simple programming model. Software developers can port audio, voice, and enhancement software codecs completely in C, while maintaining or surpassing the performance of assembly on other DSP and CPU architectures. This minimizes the time required to port and maintain special or proprietary software. 

Processor design process

For Processor Designers

We deliver patented, proven tools that automate the process of generating your Tensilica Fusion DSP, along with matching software tools. These tools have been proven in thousands of designs and the results are guaranteed correct by construction.

View the complete set of tools for processor designers.

Softwre development process

For Software Developers

For Software DevelopersThe Xtensa Software Developer's Toolkit provides a comprehensive collection of code generation and analysis tools that speed the software development process. The Cadence Tensilica Eclipse-based Xtensa Xplorer Integrated Development Environment (IDE) serves as the cockpit for the entire development experience.

View the complete set of tools for software developers.

Breakfast Bytes Blog

 The New Fusion G6 DSP

Read more about the new Fusion G6 DSP and see how it is well suited to compute intensive Automotive MIMO Radar Applications...

Whiteboard Wednesday Videos


BDTI Evaluation Report

The Tensilica Fusion G3 DSP is "signficantly more cycle efficient on every benchmark" and "34% faster" against an industry standard DSP. Read more about the Fusion G3 DSP in the BDTI Evaluation Report

White Papers

Reducing Latency, Power, and Gate Count with the Tensilica Floating-Point FMA

Press Releases

Cadence Launches Tensilica Fusion G3 DSP Featuring Exceptional Out-of-the-Box Performance for Compute-Intensive Signal Processing Applications

New Tensilica Fusion DSP Sets Low-Energy Benchmarks for IoT, Wearables and Wireless Connectivity

More Videos

Chris Rowen talks about techniques for optimizing power in sensor-based IoT devices and always-on subsystems

Chris Rowen takes a look at how a configurable processor provides the flexibility to optimize power for a given application