[gta02-core] USB schematics

Werner Almesberger werner at openmoko.org
Mon Jun 22 01:34:34 CEST 2009

Rene Harder wrote:
> I finished the USB part and commited to svn.

Bugs (just two):

- R4905 should be R4908

- D4901 should connect to D+, not D-


- nReset should be nRESET

- why have a bump on nUSB_FLT and EN_USBHOST if nUSB_FLT could be
  straight if EN_USBHOST had a larger bump ?

- I think it's better to put component references on the left side
  of the symbol and the component value right of it (if using a
  vertical orientation).

  For horizontal orientation, reference above value.

- regarding component values for things like the surge protectors,
  it might be better to just put a key parameters, e.g., voltage
  and maybe capacitance, than the somewhat cryptic part number.

- the role of TP4904 would be cleared if it was visually attached
  to USB ground.

- shouldn't USB_D+ and USB_D- be bidirectional ?

By the way, nice cleanup !

- Werner

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