{"id":26241,"date":"2025-05-18T23:42:38","date_gmt":"2025-05-18T23:42:38","guid":{"rendered":"https:\/\/wattsemi.com\/?p=26241"},"modified":"2025-07-04T21:20:44","modified_gmt":"2025-07-04T21:20:44","slug":"starrc-spef-versus-redhawk-extraction-engine","status":"publish","type":"post","link":"https:\/\/wattsemi.com\/?p=26241","title":{"rendered":"StarRC SPEF versus Redhawk extraction engine"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"26241\" class=\"elementor elementor-26241\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5a9525f8 e-flex e-con-boxed e-con e-parent\" data-id=\"5a9525f8\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-26b4c8c5 elementor-widget elementor-widget-text-editor\" data-id=\"26b4c8c5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><\/p>\n<h3 class=\"wp-block-heading has-vivid-purple-color has-text-color has-link-color wp-elements-4e89741aa5449157ea36882f95ede5de\"><strong>Why are StarRC SPEF files required in Ansys Redhawk for IR Drop Analysis? (Even Though It Has Parasitic Extraction Capabilities)<\/strong><\/h3>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><\/p>\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"617\" class=\"wp-image-26242\" src=\"https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-12-1024x617.png\" alt=\"\" srcset=\"https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-12-1024x617.png 1024w, https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-12-300x181.png 300w, https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-12-768x463.png 768w, https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-12-1536x926.png 1536w, https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-12-2048x1234.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><\/p>\n<p class=\"wp-block-paragraph\">Ansys Redhawk is a powerful tool for <strong>power integrity (IR drop) and electromigration (EM) analysis<\/strong>, but it still relies on <strong>Standard Parasitic Exchange Format (SPEF)<\/strong> inputs for several critical reasons:<\/p>\n<p><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p><\/p>\n<h2 class=\"wp-block-heading\"><strong>1. SPEF Provides Accurate Post-Layout Parasitics<\/strong><\/h2>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><strong>Redhawk\u2019s Built-In Extraction vs. SPEF:<\/strong><\/p>\n<p>Redhawk can estimate parasitics, but <strong>SPEF files<\/strong> from signoff-quality extraction tools (e.g., StarRC, Quantus) are <strong>more accurate<\/strong> because:<\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>They account for <strong>process variations<\/strong> (corner-specific RC).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Include <strong>detailed coupling capacitances<\/strong> (Cc) and <strong>distributed RC networks<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Capture <strong>metal density effects<\/strong> (e.g., chemical-mechanical polishing (CMP) variations).\n<p><strong>Example Scenario:<\/strong><\/p>\n<p>If Redhawk estimates parasitics internally, it may miss <strong>localized resistance\/capacitance hotspots<\/strong> that SPEF captures from a full extraction flow.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<p><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p><\/p>\n<h2 class=\"wp-block-heading\"><strong>2. Consistency with Signoff Timing Analysis<\/strong><\/h2>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><strong>SPEF Ensures Correlation with STA:<\/strong><\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Static Timing Analysis (STA) tools (e.g., PrimeTime) use SPEF for delay calculations.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Using the <strong>same SPEF in Redhawk<\/strong> ensures IR drop analysis aligns with STA results.\n<p><strong>Risk Without SPEF:<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li>If Redhawk uses its own extraction, <strong>IR drop-induced delays may not match STA predictions<\/strong>, leading to mismatches in timing signoff.<\/li>\n<\/ul>\n<div>\u00a0<\/div>\n<div>\u00a0<\/div>\n<p><\/p>\n<p><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p><\/p>\n<h2 class=\"wp-block-heading\"><strong>3. Handling Hierarchical and Mixed-Signal Designs<\/strong><\/h2>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><strong>SPEF Supports Hierarchical Abstraction:<\/strong><\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>For large SoCs, SPEF files provide <strong>black-boxed<\/strong> or <strong>reduced-order models<\/strong> of macros (e.g., SRAMs, analog blocks).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Redhawk\u2019s internal extraction may not handle hierarchical partitioning efficiently.\n<p><strong>Mixed-Signal Designs:<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li>SPEF includes <strong>analog parasitics<\/strong> (e.g., substrate coupling) that Redhawk\u2019s digital-centric extraction might miss.<\/li>\n<\/ul>\n<div>\u00a0<\/div>\n<div>\u00a0<\/div>\n<p><\/p>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p><\/p>\n<h2 class=\"wp-block-heading\"><strong>4. Redhawk\u2019s Role: Power Network Analysis, Not Extraction<\/strong><\/h2>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><strong>Redhawk\u2019s Core Strength:<\/strong><\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>Focuses on <strong>dynamic IR drop, EM, and power noise<\/strong> rather than parasitic extraction.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>SPEF lets Redhawk <strong>offload extraction<\/strong> to dedicated tools (StarRC, Quantus) while specializing in power integrity.\n<p><strong>Performance Trade-off:<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li>Extracting parasitics on-the-fly in Redhawk would <strong>slow down analysis<\/strong> for large designs.<\/li>\n<\/ul>\n<div>\u00a0<\/div>\n<div>\u00a0<\/div>\n<p><\/p>\n<p><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><\/p>\n<h2 class=\"wp-block-heading\"><strong>5. SPEF Enables Cross-Tool Validation<\/strong><\/h2>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><strong>Golden Reference for Debugging:<\/strong><\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>If IR drop issues arise, engineers can <strong>compare SPEF-based Redhawk results<\/strong> with other tools (e.g., Voltus, PrimePower) to isolate inaccuracies.\n<p><strong>Example Workflow:<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<p><\/p>\n<pre class=\"wp-block-code\"><code>  graph LR\n    A[Layout (DEF\/LEF)] --&gt; B[StarRC\/Quantus]\n    B --&gt; C[SPEF]\n    C --&gt; D[Redhawk IR Drop Analysis]\n    D --&gt; E[Signoff]<\/code><code><br \/><\/code><code><br \/><\/code><\/pre>\n<p><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p><\/p>\n<h2 class=\"wp-block-heading\"><strong>When Does Redhawk Use Its Own Parasitics?<\/strong><\/h2>\n<p><\/p>\n<p class=\"wp-block-paragraph\">Redhawk can estimate parasitics <strong>in limited scenarios<\/strong>, such as:<\/p>\n<p><\/p>\n<ol class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ol class=\"wp-block-list\"><\/ol>\n<\/li>\n<\/ol>\n<p>\u00a0<\/p>\n<ol class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ol class=\"wp-block-list\">\n<li><strong>Early Exploration<\/strong> (pre-layout, rough estimation).<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p><\/p>\n<ol class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ol class=\"wp-block-list\">\n<li><strong>Missing SPEF<\/strong> (with reduced accuracy).<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p><\/p>\n<ol class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ol class=\"wp-block-list\">\n<li><strong>Partial Updates<\/strong> (small ECOs where full re-extraction isn\u2019t needed).<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p><\/p>\n<p><\/p>\n<p class=\"wp-block-paragraph\">However, for <strong>signoff-quality IR drop analysis<\/strong>, SPEF remains mandatory.<\/p>\n<p><\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEiL2Hqkk9ub3ezCDPa8Dx2aqyTMgy9qmRpeHATeKA9ErA9GAXhH8bf3oIDZjM-ZhlKkNDZYGzEpqLYtzpk9l69Qtw6soKpSOyHz7mQ2q4rdhI3kgOP7yXrx0BegKd_ZahfHoXdJsIJpE_z7\/d\/spef1.JPG\" alt=\"\" \/><\/figure>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><\/p>\n<p class=\"has-vivid-cyan-blue-color has-text-color has-link-color wp-elements-239e112b526ab3e94fe10081f8d85c60 wp-block-paragraph\"><strong>Standard SPEF extraction (e.g., StarRC) often excludes PG nets by default since they\u2019re typically handled by dedicated power integrity tools.<\/strong><\/p>\n<p><\/p>\n<p class=\"wp-block-paragraph\">We use SPEF with signal nets only and let RedHawk extraction engine compute the parasitics extraction for PG nets, which for sign-off is recommended to use RedHawk\u2019s extraction engine.<\/p>\n<p><\/p>\n<p class=\"wp-block-paragraph\"><strong>However, if needed, you can also force StarRC to include PG nets:<\/strong><\/p>\n<p><\/p>\n<p class=\"wp-block-paragraph\"># Enable PG net extraction in StarRC config (EXT.conf)<br \/>PRESERVE_PG_NET_NAMES : YES<br \/>EXTRACT_PG_NET_GEOMETRY : YES<br \/>EXTRACT_PG_NET_CC : YES # Captures coupling caps<\/p>\n<p><\/p>\n<p class=\"has-luminous-vivid-amber-background-color has-background wp-block-paragraph\"># Generate SPEF with PG nets<br \/><strong>write_parasitics -format SPEF -output design_pg.spef -include_pg_nets<\/strong><\/p>\n<p><\/p>\n<p class=\"wp-block-paragraph\">However, RH extraction engine is better for this, make sure to use the PG nets option in RH.<\/p>\n<p><\/p>\n<p class=\"has-pale-cyan-blue-color has-text-color has-link-color wp-elements-c0f2ce6236098a8bd7021b2e9d0b2e79 wp-block-paragraph\"># In RedHawk (or Fusion Compiler with RedHawk engine)<br \/>analyze_power_network -extraction_engine redhawk -power_ground_nets {VDD VSS} -dynamic<\/p>\n<figure class=\"wp-block-image\"><img alt=\"\" \/><\/figure>\n<p> <\/p>\n<div data-block=\"gutenkit\/container\" data-post-id=\"26241\" id=\"block-10a5db8c-9a60-444d-8868-5641dadeeda4\" class=\"wp-block-gutenkit-container alignfull gkitdeeda4 gutenkit-block\">\n<div class=\"gkit-block__inner\">\n<p> <\/p>\n<div data-block=\"gutenkit\/container\" data-post-id=\"26241\" id=\"block-938c3575-e65c-4db8-ad5c-a85a67b46a3f\" class=\"wp-block-gutenkit-container alignfull gkitb46a3f gutenkit-block\">\n<div class=\"gkit-block__inner\">\n<p> <\/p>\n<div data-block=\"gutenkit\/heading\" data-post-id=\"26241\" id=\"block-883a2479-b9ea-4493-859b-2831c560dc69\" class=\"wp-block-gutenkit-heading gkit-heading-border-position-start gkitfca582 gutenkit-block\">\n<h3 class=\"gkit-heading-title\">Key Takeaways<\/h3>\n<div class=\"gkit-heading-description\">\n<p>Always use corner-specific SPEF (e.g., maxRC for worst-case IR drop).<\/p>\n<\/div>\n<\/div>\n<div class=\"wp-block-gutenkit-container alignfull\">\n<div class=\"gkit-block__inner\">\n<figure class=\"wp-block-table is-style-stripes has-medium-font-size\" style=\"padding: 81;\">\n<table class=\"has-vivid-cyan-blue-color has-text-color has-background has-link-color\" style=\"background-color: #c5d4d8; border-width: 1px;\">\n<thead>\n<tr>\n<th><strong>Reason<\/strong><\/th>\n<th><strong>Why SPEF is Better<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Accuracy<\/strong><\/td>\n<td>Signoff extraction tools model RC more precisely.<\/td>\n<\/tr>\n<tr>\n<td><strong>STA Correlation<\/strong><\/td>\n<td>Ensures IR drop and timing analysis agree.<\/td>\n<\/tr>\n<tr>\n<td><strong>Hierarchical Support<\/strong><\/td>\n<td>Handles macros\/black boxes efficiently.<\/td>\n<\/tr>\n<tr>\n<td><strong>Performance<\/strong><\/td>\n<td>Lets Redhawk focus on power analysis.<\/td>\n<\/tr>\n<tr>\n<td><strong>Debugging<\/strong><\/td>\n<td>Cross-tool consistency checks.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p> <\/p>\n<\/div>\n<\/div>\n<p> <\/p>\n<\/div>\n<\/div>\n<p> <\/p>\n<\/div>\n<\/div>\n<p><!-- \/wp:gutenkit\/container --><!-- wp:paragraph {\"backgroundColor\":\"light-green-cyan\"} --><\/p>\n<h6>Regarding using IPF or Instance power Format file from PrimePower, the general recommendation is to\u00a0start with PrimePower IFBS\/IPF, then refine with RedHawk for IR-aware updates.<\/h6>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>RedHawk should improve power estimates compared to PrimePower, as RedHawk adjusts power calculations based on local IR drop and temperature, while PrimePower assumes nominal voltage.<\/p>\n<p>So while PrimePower gives better cell level accuracy, RedHawk provides better IR\/ Thermal Aware results.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><!-- \/wp:paragraph --><!-- wp:image {\"id\":26243,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} --><\/p>\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"615\" height=\"143\" class=\"wp-image-26243\" src=\"https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-1.jpeg\" alt=\"\" srcset=\"https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-1.jpeg 615w, https:\/\/wattsemi.com\/wp-content\/uploads\/2025\/05\/image-1-300x70.jpeg 300w\" sizes=\"(max-width: 615px) 100vw, 615px\" \/><\/figure>\n<p><!-- \/wp:image --><!-- wp:separator --><\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p><!-- \/wp:separator --><!-- wp:heading {\"level\":3,\"style\":{\"elements\":{\"link\":{\"color\":{\"text\":\"var:preset|color|pale-cyan-blue\"}}}},\"textColor\":\"pale-cyan-blue\"} --><\/p>\n<h3 class=\"wp-block-heading has-pale-cyan-blue-color has-text-color has-link-color\">Seeing large Delta between StarRC extraction versus manual hand calculations?<\/h3>\n<p><!-- \/wp:heading --><!-- wp:paragraph {\"backgroundColor\":\"cyan-bluish-gray\"} --><\/p>\n<p class=\"has-cyan-bluish-gray-background-color has-background\"><strong>Readers Ask:<br \/><\/strong><br \/>The Resistance number for simple RDL routing [bump to IO pad] extracted by STAR-RC shows significant delta [35%] compare to manual calculation [R = sheet resistance * L\/W]. What could be the reason or solution?<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph {\"backgroundColor\":\"cyan-bluish-gray\"} --><\/p>\n<p class=\"has-cyan-bluish-gray-background-color has-background\"><strong>Our Experts answer: <br \/><\/strong><br \/>1) Regarding the 40% delta between StarRC vs manual calculation, it appears that StarRC might be using a different Sheet resistance value than your manual calc. due to difference in process corner\/ Temp. or layer specific adjustments.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><strong>Have you tried to report layer properties in StarRC?<br \/>report_layer_rc -layer RC -corner ss<\/strong><\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Compare Rho with manual value.<\/p>\n<p><strong>2) Another issue could be Via Resistance:<br \/><\/strong>&#8211; StarRC includes via resistance (bump-to-RDL and RDL-to-10-pad bias), which manual R = p \u2022 L\/W ignores.<br \/>\u2022 A single via can add 0.1-29 depending on size\/stacking.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><strong># Report via resistance from tech file<br \/>report_via_resistance -via_type VIA1<br \/><\/strong><br \/>3) <strong>Another solution <\/strong>to try is to extract effective resistance using Redhawk which is better at computing for RDL resistance and also accounting for parallel paths, if any.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p><!-- \/wp:paragraph --><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b03619e e-flex e-con-boxed e-con e-parent\" data-id=\"b03619e\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Why are StarRC SPEF files required in Ansys Redhawk for IR Drop Analysis? (Even Though It Has Parasitic Extraction Capabilities) Ansys Redhawk is a powerful tool for power integrity (IR drop) and electromigration (EM) analysis, but it still relies on Standard Parasitic Exchange Format (SPEF) inputs for several critical reasons: 1. SPEF Provides Accurate Post-Layout [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":26243,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""},"footnotes":""},"categories":[40],"tags":[72,73,74,71],"class_list":["post-26241","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-extraction","tag-parasitics","tag-redhawk","tag-spef"],"_links":{"self":[{"href":"https:\/\/wattsemi.com\/index.php?rest_route=\/wp\/v2\/posts\/26241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wattsemi.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wattsemi.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wattsemi.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/wattsemi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=26241"}],"version-history":[{"count":8,"href":"https:\/\/wattsemi.com\/index.php?rest_route=\/wp\/v2\/posts\/26241\/revisions"}],"predecessor-version":[{"id":26431,"href":"https:\/\/wattsemi.com\/index.php?rest_route=\/wp\/v2\/posts\/26241\/revisions\/26431"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wattsemi.com\/index.php?rest_route=\/wp\/v2\/media\/26243"}],"wp:attachment":[{"href":"https:\/\/wattsemi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wattsemi.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wattsemi.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}