16 lines
832 B
Markdown
16 lines
832 B
Markdown
v0
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this version has been designed to fit in a 100x60x25mm enclosure.
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this makes it very compact, and not all surface mount parts fit on one side.
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this is not too much of an issue since it's a hand soldered prototype.
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the prototype mostly works, with a couple of small errors:
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- 6-40V power input is not activated unless the hub is already powered (through USB or 5V input)
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- crystal oscillator doesn't always start. I think the underlying copper plane skewed the impedance/capacitance too much
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- USB-A footprint has inverted pinout: just solder it on the other side and don't swap the data pins in the EEPROM configuration
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- fuse on downstream port is not fast enough to prevent shorts and causes the hub to reset
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- 6-40V power input capacitor is too tall and does not fit in the case
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- one of the LEDS on port 3 is misplaced
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