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A high speed asynchronous multi input pipeline for compaction and transfer of parallel SIMD data

: Hoppe, Christoph; Döge, Jens; Reichel, Peter; Russell, Patrick; Reichel, Andreas; Schneider, Peter

Postprint urn:nbn:de:0011-n-4973566 (633 KByte PDF)
MD5 Fingerprint: bd511a3ef2750380bb083630ece20f82
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Created on: 27.6.2018

Institute of Electrical and Electronics Engineers -IEEE-; TU Wien:
24th IEEE International Symposium on Asynchronous Circuits and Systems, ASYNC 2018 : May 13-16, 2018, Vienna, Austria
Piscataway, NJ: IEEE, 2018
International Symposium on Asynchronous Circuits and Systems (ASYNC) <24, 2018, Vienna>
Bundesministerium für Bildung und Forschung BMBF
03ZZ0427E; cSoC3D
Echtzeitfähige 3D-Datenverarbeitung auf kaskadierten analog-digital customized System on a Chip-Architekturen
Conference Paper, Electronic Publication
Fraunhofer IIS, Institutsteil Entwurfsautomatisierung (EAS) ()

Image sensors with programmable, highly parallel signal processing, so called Vision-Systems-on-Chip, perform computationally intensive tasks directly on the sensor itself. Therefore it is possible to limit the amount of output data to relevant image features only. Reading out such features presents a major challenge, since the position and number of features often is not known. Conventional synchronous buses as well as special event-based readout paths are unsuitable for such a system, since both continuous data, e.g. complete images, and sparse data, like feature coordinates, have to be transfered. A readout path based on an asynchronous pipeline is presented, which supports both readout modes with high speed. Furthermore, a method is introduced that, by serialization, allows for arbitrary data word widths without storing any control information within the data stream. The developed circuit components were measured on a proof-of-concept test chip in a 180 nm CMOS technology and were compared with implementations of asynchronous pipelines found in literature. In addition, the use of the pipeline in a Vision-System-on-Chip, which is still in production, is demonstrated.