https://wikiti.brandonw.net/index.php?action=history&feed=atom&title=83Plus%3APorts%3A4B 2026-04-11T08:57:14Z Revision history for this page on the wiki MediaWiki 1.23.5 https://wikiti.brandonw.net/index.php?title=83Plus:Ports:4B&diff=11660&oldid=prev 2020-03-04T00:53:02Z

<p>Created page with &quot;<a href="/index.php?title=Category:83Plus:Ports:By_Address" title="Category:83Plus:Ports:By Address">4B - USB power</a> <a href="/index.php?title=Category:83Plus:Ports:By_Name" title="Category:83Plus:Ports:By Name">USB power</a> {{84P-Only Port|03}} == Synopsis == &#039;&#039;&#039;Port Number:&#039;&#039;&#039; 4B &#039;&#039;&#039;Function:&#039;&#039;&#039; USB...&quot;</p> <p><b>New page</b></p><div>[[Category:83Plus:Ports:By Address|4B - USB power]] [[Category:83Plus:Ports:By Name|USB power]]<br /> {{84P-Only Port|03}}<br /> == Synopsis ==<br /> '''Port Number:''' 4B<br /> <br /> '''Function:''' USB power<br /> <br /> This has something to do with the USB power (+5 VDC) line.<br /> <br /> === Bits ===<br /> All bits are read-only, except bit 5.<br /> * Bit 0: Perhaps indicates if there's voltage on the line?<br /> * Bit 1: Unknown function<br /> * Bit 2: Perhaps indicates if there's NOT voltage on the line?<br /> * Bit 3: Means something, possibly change in Vcc?<br /> * Bit 4: Possibly means charge pump is active?<br /> * Bit 5: Set to possibly enable charge pump? Related to some GPIO pins. If bit 4 is unimportant, then this bit needs to be futzed with manually to make the charge pump work.<br /> * Bit 6: Possibly the OR of bits 4 and 5?<br /> * Bit 7: No function<br /> <br /> == Comments ==<br /> This is mostly speculation.</div>

Dr. D'nar