Le comit\u00e9 ex\u00e9cutif de la Mi2i a le plaisir de vous convier \u00e0 la pr\u00e9sentation du travail de Maximilien Remillieux sur l’impl\u00e9mentation d’un coeur RISC-V en technologie TSMC 65nm. Un grand merci \u00e0 Maximilien d’avoir accept\u00e9 de nous pr\u00e9senter son travail.<\/p>\n\n\n\n
Ce webinaire se tiendra le\u00a0jeudi 11 septembre 2025\u00a0de 10h30 \u00e0 11h15 et utilisera la plateforme Zoom. Le lien sera communiqu\u00e9 via la mailing list \u201ccadence VLSI\u201d. Si vous n\u2019avez pas re\u00e7u ce lien, vous pouvez contacter Laurent Leterrier.<\/p>\n\n\n\n
R\u00e9sum\u00e9 : <\/p>\n\n\n\n
Ce webinaire pr\u00e9sente le contexte, les objectifs et les travaux r\u00e9alis\u00e9s dans le cadre d\u2019un stage au sein de l\u2019Institut de Physique des 2 Infinis (IP2I) de Lyon, un laboratoire du CNRS affili\u00e9 \u00e0 l\u2019IN2P3. L\u2019IP2I est impliqu\u00e9 dans de nombreux projets en physique fondamentale, notamment dans la d\u00e9tection de particules. Le stage s\u2019inscrit dans le cadre du projet OSCARI (Open System for capacitive Sensor aCcess & readout with artificial Intelligence), qui vise \u00e0 d\u00e9velopper une \u00e9lectronique intelligente pour le traitement en ligne de signaux issus de d\u00e9tecteurs capacitifs. Ce syst\u00e8me repose sur un ASIC en technologie TSMC 65 nm int\u00e9grant des c\u0153urs RISC-V, de la m\u00e9moire et des ADC, afin de r\u00e9aliser un traitement local \u00e0 faible consommation via des algorithmes de d\u00e9bruitage et de d\u00e9convolution utilisant l\u2019intelligence artificielle.
Le choix de l\u2019architecture RISC-V est motiv\u00e9 par sa flexibilit\u00e9, sa compacit\u00e9, son caract\u00e8re open- source et sa compatibilit\u00e9 avec une validation sur FPGA avant fabrication. Le c\u0153ur s\u00e9lectionn\u00e9, PicoRV32, est un processeur RISC-V minimaliste conforme \u00e0 l\u2019ISA RV32I, sans extension, ce qui permet une impl\u00e9mentation efficace en surface et en consommation. Le c\u0153ur utilise une interface m\u00e9moire simple (byte-aligned) connect\u00e9e \u00e0 une m\u00e9moire de type DFFRAM, synth\u00e9tisable sans outil propri\u00e9taire mais gourmande en surface.
L\u2019objectif du stage est de valider l\u2019impl\u00e9mentation de ce c\u0153ur \u00e0 la fois sur FPGA et en technologie ASIC. La premi\u00e8re \u00e9tape a consist\u00e9 \u00e0 int\u00e9grer, simuler et tester le c\u0153ur sur une carte Nexys A7 (Artix-7), en d\u00e9veloppant les scripts, le firmware et la toolchain adapt\u00e9s. Ensuite, un testbench RTL complet a \u00e9t\u00e9 \u00e9labor\u00e9 pour valider la logique du c\u0153ur. Le flot de d\u00e9veloppement ASIC a \u00e9t\u00e9 mis en \u0153uvre via les outils Cadence : Xcelium pour les simulations RTL et post-layout, Genus pour la synth\u00e8se logique et Innovus pour le placement-routage et l\u2019analyse de timing (STA).
La simulation post-PnR a permis de valider que le design respecte les contraintes temporelles apr\u00e8s insertion des d\u00e9lais.
Les r\u00e9sultats obtenus montrent que le c\u0153ur PicoRV32 fonctionne correctement, aussi bien dans son environnement FPGA que dans sa version synth\u00e9tis\u00e9e pour ASIC TSMC 65 nm. Le
fonctionnement a \u00e9t\u00e9 valid\u00e9 dans les deux cas, confirmant la faisabilit\u00e9 de l\u2019int\u00e9gration du c\u0153ur RISC-V dans un environnement de d\u00e9tection intelligente \u00e0 base d\u2019IA, avec un flot complet de d\u00e9veloppement RTL-to-PNR.<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Le comit\u00e9 ex\u00e9cutif de la Mi2i a le plaisir de vous convier \u00e0 la pr\u00e9sentation du travail de Maximilien Remillieux sur l’impl\u00e9mentation d’un coeur RISC-V en technologie TSMC 65nm. Un grand merci \u00e0 Maximilien d’avoir accept\u00e9 de nous pr\u00e9senter son travail. Ce webinaire se tiendra le\u00a0jeudi 11 septembre 2025\u00a0de 10h30 \u00e0 11h15 et utilisera la […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ngg_post_thumbnail":0,"footnotes":""},"categories":[50],"tags":[],"class_list":["post-1220","post","type-post","status-publish","format-standard","hentry","category-actualites"],"_links":{"self":[{"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/posts\/1220","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/comments?post=1220"}],"version-history":[{"count":2,"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/posts\/1220\/revisions"}],"predecessor-version":[{"id":1222,"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/posts\/1220\/revisions\/1222"}],"wp:attachment":[{"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/media?parent=1220"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/categories?post=1220"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/caemi2i.in2p3.fr\/index.php\/wp-json\/wp\/v2\/tags?post=1220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}