{"id":5724,"date":"2022-08-30T06:37:51","date_gmt":"2022-08-30T01:07:51","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/"},"modified":"2022-08-30T06:37:51","modified_gmt":"2022-08-30T01:07:51","slug":"solved-implementing-sequential-circuit-in-verilog","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/","title":{"rendered":"[Solved] Implementing Sequential Circuit in Verilog"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-32431167\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"32431167\" data-parentid=\"32421318\" data-score=\"2\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p><strong>seq_circuit1<\/strong><\/p>\n<ul>\n<li>You can&#8217;t instantiate submodules (your FFs) inside an <code>always<\/code> block.<br \/>\nMove them outside, either before or after.<\/li>\n<li>Your instantiations for <code>jkfflop<\/code> are missing the <code>clk<\/code> input signal.<\/li>\n<li>based on your diagram, your inputs to the FFs should be combinational logic, not sequential, and should therefore use an <code>always @(*)<\/code> block, not a clocked one.<\/li>\n<\/ul>\n<p><strong>jkfflop<\/strong><\/p>\n<ul>\n<li><code>if<\/code> statements in verilog are only valid inside a <code>generate<\/code>, <code>always<\/code> or <code>inital<\/code> block. Since this is a FF, you&#8217;ll want an <code>always @(posedge clk)<\/code> or <code>always @(negedge clk)<\/code><\/li>\n<li>If using an always block, replace the <code>assign<\/code> statements with non-blocking assignments (<code>&lt;=<\/code>). We use NBA&#8217;s here instead of a blocking assignments (<code>=<\/code>), as it&#8217;s an edge-triggered block. <\/li>\n<li>If assigning a value to <code>Q<\/code> inside an always block, change <code>output Q<\/code> to <code>output reg Q<\/code> <\/li>\n<\/ul>\n<\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Implementing Sequential Circuit in Verilog <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] seq_circuit1 You can&#8217;t instantiate submodules (your FFs) inside an always block. Move them outside, either before or after. Your instantiations for jkfflop are missing the clk input signal. based on your diagram, your inputs to the FFs should be combinational logic, not sequential, and should therefore use an always @(*) block, not a clocked &#8230; <a title=\"[Solved] Implementing Sequential Circuit in Verilog\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/\" aria-label=\"More on [Solved] Implementing Sequential Circuit in Verilog\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[1499],"class_list":["post-5724","post","type-post","status-publish","format-standard","hentry","category-solved","tag-verilog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Implementing Sequential Circuit in Verilog - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Implementing Sequential Circuit in Verilog - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] seq_circuit1 You can&#8217;t instantiate submodules (your FFs) inside an always block. Move them outside, either before or after. Your instantiations for jkfflop are missing the clk input signal. based on your diagram, your inputs to the FFs should be combinational logic, not sequential, and should therefore use an always @(*) block, not a clocked ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-08-30T01:07:51+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] Implementing Sequential Circuit in Verilog\",\"datePublished\":\"2022-08-30T01:07:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/\"},\"wordCount\":125,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"verilog\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/\",\"name\":\"[Solved] Implementing Sequential Circuit in Verilog - JassWeb\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#website\"},\"datePublished\":\"2022-08-30T01:07:51+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/jassweb.com\/solved\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Solved] Implementing Sequential Circuit in Verilog\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/jassweb.com\/solved\/#website\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"name\":\"JassWeb\",\"description\":\"Build High-quality Websites\",\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/jassweb.com\/solved\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\",\"name\":\"Jass Web\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"contentUrl\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"width\":693,\"height\":132,\"caption\":\"Jass Web\"},\"image\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\",\"name\":\"Kirat\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586\",\"contentUrl\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586\",\"caption\":\"Kirat\"},\"sameAs\":[\"http:\/\/jassweb.com\"],\"url\":\"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Solved] Implementing Sequential Circuit in Verilog - JassWeb","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] Implementing Sequential Circuit in Verilog - JassWeb","og_description":"[ad_1] seq_circuit1 You can&#8217;t instantiate submodules (your FFs) inside an always block. Move them outside, either before or after. Your instantiations for jkfflop are missing the clk input signal. based on your diagram, your inputs to the FFs should be combinational logic, not sequential, and should therefore use an always @(*) block, not a clocked ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/","og_site_name":"JassWeb","article_published_time":"2022-08-30T01:07:51+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] Implementing Sequential Circuit in Verilog","datePublished":"2022-08-30T01:07:51+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/"},"wordCount":125,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["verilog"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/","url":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/","name":"[Solved] Implementing Sequential Circuit in Verilog - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-08-30T01:07:51+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-implementing-sequential-circuit-in-verilog\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] Implementing Sequential Circuit in Verilog"}]},{"@type":"WebSite","@id":"https:\/\/jassweb.com\/solved\/#website","url":"https:\/\/jassweb.com\/solved\/","name":"JassWeb","description":"Build High-quality Websites","publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/jassweb.com\/solved\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/jassweb.com\/solved\/#organization","name":"Jass Web","url":"https:\/\/jassweb.com\/solved\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/","url":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","contentUrl":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","width":693,"height":132,"caption":"Jass Web"},"image":{"@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31","name":"Kirat","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/","url":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586","contentUrl":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1776403586","caption":"Kirat"},"sameAs":["http:\/\/jassweb.com"],"url":"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/5724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/comments?post=5724"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/5724\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=5724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=5724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=5724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}