3 ms·

Curious what led to this decision. Reference schematics exist for a reason... It seems odd to not use them.

• nerdponx 7y ago
  That's what I was thinking. I've recently gotten into hardware design myself as part of a hobby, and this is something I learned early on. I'm sure they had good reasons to deviate from the reference (I assume they are experienced hardware designers over there), but I'd be very curious as to what those reasons were.
  • MobileVet 7y ago
    Considering the heavy emphasis on budget, it could very well have been on reduced cost. Is a single resistor expensive? No but each decision adds up and it may just be ingrained in the team's ethos. Many times if we push something too hard, we apply the rule without questioning whether it truly makes sense in a particular situation.
    • voidwtf 7y ago
      In this case they directly shorted two pins together though. That would give me pause to ask why the two pins existed in the first place. Something that should have led to the conclusion the author reached about the configuration.
      • MobileVet 7y ago
        I personally agree and would have been curious myself. That said, someone with less experience might have just said ‘oh cool, I can be clever and reduce our BOM’ and not given much thought to it.
      • michaelt 7y ago
        That would give me pause to ask why the two pins existed in the first place. Bear in mind, the USB-C connector is designed to be rotationally symmetric - so you'll start your layout by paralleling up the four ground pins, and the four bus power pins, and the two pins for USB 2.0 negative and the two for USB 2.0 positive. I can understand why it might get overlooked, when someone has paralleled up 12 pins in the last 5 minutes...
        • voidwtf 7y ago
          I can see now how one might end up in the position, still the spec schematic clearly shows two separate resistors. Curious either way :|