{"id":1413,"date":"2025-04-11T04:32:39","date_gmt":"2025-04-11T04:32:39","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&#038;p=1413"},"modified":"2025-05-29T09:20:43","modified_gmt":"2025-05-29T09:20:43","slug":"cpu-i-o-configuration","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/product-documentation\/product-documentation-controllers\/hmi430-700-product-documentation\/system-calls-the-cpu-device\/cpu-i-o-configuration\/","title":{"rendered":"CPU: I\/O configuration"},"content":{"rendered":"\n<p>The instruction<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">     SPxChIn   0,!<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/glossary-of-terms\/#o431\">CPU<\/a><\/pre>\n\n\n\n<p>will return the board&#8217;s I\/O configuration in U. This will vary with different numbers of&nbsp;<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/tutorials-application-notes-and-white-papers\/the-splat-expansion-framework\/the-splat-expansion-framework\/xpice\/\">XPice expansion boards<\/a>&nbsp;connected. The items returned are:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>U0<\/td><td>Number of digital inputs<\/td><\/tr><tr><td>U1<\/td><td>Number of digital outputs<\/td><\/tr><tr><td>U2<\/td><td>Number of analog inputs<\/td><\/tr><tr><td>U3<\/td><td>Number of analog outputs<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Note that, in general, the numbers returned are the maxima for each type of resource. Pins on&nbsp;<a href=\"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/glossary-of-terms\/#o366\">SPice<\/a>&nbsp;connectors are configurable to more than one type of I\/O. Each such configurable pin will be included in each of the possible of the above counts.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Example:<\/h6>\n\n\n\n<p>An SL99 without any expansion boards connected will return the numbers<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>U0=16<\/td><td>Number of digital inputs<\/td><\/tr><tr><td>U1=14<\/td><td>Number of digital outputs<\/td><\/tr><tr><td>U2=5<\/td><td>Number of analog inputs<\/td><\/tr><tr><td>U3=3<\/td><td>Number of analog outputs<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The 14 inputs are 8 external inputs on the base board, 2 option links that appear as inputs and 6 SPice pins that can be configured as inputs.<\/li>\n\n\n\n<li>The 14 outputs are 8 external outputs on the base board plus 6 SPice pins that can be configured as outputs.<\/li>\n\n\n\n<li>The 5 analog inputs are 1 provided on the base board plus 4 SPice pins that can be configured as analog inputs.<\/li>\n\n\n\n<li>The 3 analog outputs are 1 provided on the base board plus 2 SPice pins that can be configured as analog outputs. Of the latter 2, one (Analog output G) is also the thermistor excitation voltage.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The instruction SPxChIn 0,!CPU will return the board&#8217;s I\/O configuration in U. This will vary with different numbers of&nbsp;XPice expansion boards&nbsp;connected. The items returned are:&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1408,"menu_order":4,"template":"","class_list":["post-1413","spl_knowledgebase","type-spl_knowledgebase","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CPU: I\/O configuration - SPLat Controls<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CPU: I\/O configuration - SPLat Controls\" \/>\n<meta property=\"og:description\" content=\"The instruction SPxChIn 0,!CPU will return the board&#8217;s I\/O configuration in U. This will vary with different numbers of&nbsp;XPice expansion boards&nbsp;connected. 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