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Hexagon is VLIW DSP architecture designed by Qualcomm. It is used in manu Qualcomm's SoC as Audio and Sensor processors, and in the many Qualcomm modems. Usually runs some kind of Real-time OS, optimized for low power and small chip area. Supports of simultaneous execution of several threads, with interleaved multithreading in V1-V4 and dynamic multithreading since V5.

Architecture

Versions of Hexagon Architecture:

• V1 - 65nm, October 2006
• V2 - 65nm, December 2007
• V3M - 45nm, June 2009
• V3C - 45nm, August 2009
• V3L - 45nm, November 2009
• V4M - 28nm, December 2010
• V4C - 28nm, December 2010
• V4L - 28nm, April 2011
• V5A - 28nm, December 2012
• V5H - 28nm, December 2012

Memory Hierarchy

• L1I Cache:
• L1D Cache:
• L2 Cache:
• L3 Cache:
• TLBs:

Core

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All SoCs using Hexagon

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References

• Lucian Codrescu, Qualcomm, Qualcomm Hexagon DSP: An architecture optimized for mobile multimedia and communications, HotChips 2013
• Lucian Codrescu, Qualcomm, Architecture of the Hexagon 680 DSP for Mobile Imaging and Computer Vision, HotChips #27 2015

Documents

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