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What is USB ON_OFF pin in 86duino ONE schematic sheet does?
2016 年 01 月 22 日
14:15:57
zerozaber
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2015 年 02 月 11 日
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According to 86duino ONE schematic sheet, at microUSB part.
There is USB ON_OFF pin connected between GP71 and D+
This is not found in EDUCAKE

The question is what does it do? What happened if GP71 is not used, do I have to set it in BIOS or something?

2016 年 01 月 25 日
11:31:49
Android_Lin
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2014 年 04 月 01 日
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Hi, zerozaber

The USB ON_OFF pin also can be found in page 2 of EduCake schematic sheet.
The USB ON_OFF pin is used to instruct whether the 86Duino USB device is plugged into PC or not, and the I/O pin controlling USB ON_OFF is GP71. The USB ON_OFF pin is connected to D+ and also indicate the 86Duino USB device works on full speed (or up). See the detail in this page.
This pin is necessary in USB electrical design (you also can see the different implementation on other USB device ex: keyboard), for 86Duino, we can manipulate it by using the I/O functions like line 195 and 199 in the USBCore.cpp.

2016 年 01 月 26 日
01:40:26
zerozaber
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2015 年 02 月 11 日
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Thanks, Android_Lin.

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