{"id":9168,"date":"2025-12-11T15:50:51","date_gmt":"2025-12-11T15:50:51","guid":{"rendered":"https:\/\/www.diyipcb.com\/?post_type=product&#038;p=9168"},"modified":"2026-09-27T15:06:02","modified_gmt":"2026-09-27T15:06:02","slug":"pcf8574-i2c-interface-8bit-io-mcu-expansion-board-i-o-expander-i2c-bus-evaluation-development-module-avr-stm8-c8051f-for-arduino","status":"publish","type":"product","link":"https:\/\/www.diyipcb.com\/de\/produkt\/pcf8574-i2c-interface-8bit-io-mcu-expansion-board-i-o-expander-i2c-bus-evaluation-development-module-avr-stm8-c8051f-for-arduino\/","title":{"rendered":"PCF8574 I2C-Schnittstelle 8-Bit-IO-MCU-Erweiterungsplatine I\/O-Expander I2C-Bus-Evaluierungs- und Entwicklungsmodul AVR STM8 C8051F f\u00fcr Arduino"},"content":{"rendered":"<p>Das PCF8574 ist ein I\/O-Port-Erweiterungsmodul, das das I\u00b2C-Protokoll verwendet. Es verf\u00fcgt \u00fcber drei Adresspins und kann bis zu acht Adressen gleichzeitig zuweisen. Die Platine enth\u00e4lt 8-Bit-bidirektionale I\/O-Ports (P0\u2013P7), die jeweils separat als Ein- oder Ausgang konfiguriert werden k\u00f6nnen, ohne dass Steuersignale f\u00fcr die Datenrichtung erforderlich sind. Im eingeschalteten Zustand sind alle I\/O-Pegel standardm\u00e4\u00dfig auf High-Pegel.<\/p>\n<p><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/pcf8574i2c_1.jpg\" \/><\/p>\n<p>Versorgungsspannung: 3,3 V\/5 V<\/p>\n<p>Kommunikationsschnittstelle: I2C-Schnittstelle, 8-Bit-Parallelport<\/p>\n<p>Schnittstellentyp: Stift oder Buchse<\/p>\n<p>Interrupt-Ausgang: mit dem Interrupt-Pin des Mikrocontrollers verbunden, Low-Pegel ist g\u00fcltig<\/p>\n<p>Anweisungen zum Einstellen der I2C-Adresse<\/p>\n<p>Die Standard-I2C-Adresse des Moduls ist 0x20.<\/p>\n<p>Die I2C-Adresse kann \u00fcber A0-A2 auf 8 verschiedene Adressen eingestellt werden, wie in der Abbildung dargestellt.<\/p>\n<p>Alle Jumper sind auf der \u201c-\u201d-Seite eingestellt, was bedeutet, dass LOW ein niedriger Pegel ist.<\/p>\n<p>Die \u201c+\u201d-Seite steht f\u00fcr HOCH, was einem hohen Niveau entspricht.<\/p>\n<p>Der Adressbereich von 0x20 bis 0x27 ist in der folgenden Tabelle dargestellt, was bedeutet, dass ein Entwicklungsboard gleichzeitig 8 PCF8574-Module anschlie\u00dfen kann.<\/p>\n<p><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/pcf8574i2c_2.jpg\" \/><\/p>\n<p><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/pcf8574i2c_3.jpg\" \/><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/pcf8574i2c_4.jpg\" \/><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/pcf8574i2c_5.jpg\" \/><img decoding=\"async\" data-no-lazy=\"1\" loading=\"lazy\" src=\"https:\/\/www.diyipcb.com\/wp-content\/uploads\/module-store-import\/2025\/description_images\/renamed_description_images_filtered\/pcf8574i2c_6.jpg\" \/><\/p>\n<div class=\"simg-pop-btn\" style=\"top: 118px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 865.222px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 1490.44px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 1490.44px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 2296.67px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3102.89px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3909.11px; left: 14px; display: none;\"><\/div>\n<section class=\"module-customization\">\n<h3>Produktanpassung<\/h3>\n<p>Wir unterst\u00fctzen Dienstleistungen zur Produktindividualisierung. <a href=\"https:\/\/www.diyipcb.com\/de\/contact-us\/\">Kontaktieren Sie uns<\/a> um Ihre Anforderungen zu besprechen.<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>PCF8574 is an IO port expansion module that uses the I2C protocol. It has three address pins and can allocate up to 8 addresses simultaneously. The board includes 8-bit bidirectional IO ports (P0-P7), each of which can be separately assigned as an input or output without the need for data direction control signals. When powered&#8230;<\/p>","protected":false},"featured_media":5200,"comment_status":"open","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[94,101,2098],"product_tag":[],"class_list":["post-9168","product","type-product","status-publish","has-post-thumbnail","product_cat-electronic-modules","product_cat-prototyping-expansion","product_cat-prototyping","first","instock","shipping-taxable","purchasable","product-type-simple","entry","content-bg","loop-entry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product\/9168","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/comments?post=9168"}],"version-history":[{"count":0,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product\/9168\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/media\/5200"}],"wp:attachment":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/media?parent=9168"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_brand?post=9168"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_cat?post=9168"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_tag?post=9168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}