{"id":1271,"date":"2013-12-18T13:46:01","date_gmt":"2013-12-18T13:46:01","guid":{"rendered":"https:\/\/ibex.tech\/resources\/?p=1271"},"modified":"2022-10-19T15:25:12","modified_gmt":"2022-10-19T14:25:12","slug":"unio-general","status":"publish","type":"post","link":"https:\/\/ibex.tech\/resources\/geek-area\/communications\/unio\/unio-general","title":{"rendered":"UNI\/O General"},"content":{"rendered":"\n

The UNI\/O protocol was created by microchip and is a 1 wire bus.<\/p>\n\n\n\n

Docs<\/h4>\n\n\n\n

UNI\/O Bus Specification<\/a><\/p>\n\n\n\n

Recommended Usage of Microchip UNI\/O™ Bus-Compatible Serial EEPROMs<\/a><\/p>\n\n\n\n

<\/p>\n\n\n\n

Voltage Range<\/h4>\n\n\n\n

Not specified by the protocol so dependent on the devices being used.<\/p>\n\n\n\n

Circuit<\/h4>\n\n\n\n

A pull up resistor is not required but advisable so the bus is idle if the master is not driving it. The value is dependent on bus voltage and other factors – see here<\/a>. Based on the calculation is this datasheet:<\/p>\n\n\n\n

5V bus, Rpmin = 15K33, Rpmax = 150K<\/p>\n\n\n\n

3V3 bus, <\/span>Rpmin = 9<\/span>K666, <\/span>Rpmax = 99K<\/span><\/p>\n\n\n\n

Max cable length<\/h4>\n\n\n\n

We couldn’t find a reliable source of info on this. In our bench based tests, using unscreened (not a good idea!) 3 core 7\/0.2mm cable, we had comms working fine over 31m. When testing at 100m comms would not work at all. This was with the bus speed set to slowest allowed (10kHz).<\/p>\n","protected":false},"excerpt":{"rendered":"

The UNI\/O protocol was created by microchip and is a 1 wire bus. Docs UNI\/O Bus Specification Recommended Usage of Microchip UNI\/O™ Bus-Compatible Serial EEPROMs Voltage Range Not specified by the protocol so dependent on the devices being used. Circuit A pull up resistor is not required but advisable so the bus is idle if the master […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[80],"tags":[],"class_list":["post-1271","post","type-post","status-publish","format-standard","hentry","category-unio"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/1271","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/comments?post=1271"}],"version-history":[{"count":5,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/1271\/revisions"}],"predecessor-version":[{"id":2557,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/1271\/revisions\/2557"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/media?parent=1271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/categories?post=1271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/tags?post=1271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}