27 May
2014
27 May
'14
10:12 a.m.
On Tue, May 27, 2014 at 9:40 AM, mike.valk@gmail.com mike.valk@gmail.com wrote:
2014-05-26 16:10 GMT+02:00 Luke Kenneth Casson Leighton lkcl@lkcl.net:
On Mon, May 26, 2014 at 3:04 PM, mike.valk@gmail.com mike.valk@gmail.com wrote:
That means that every USB3, slave, device must accept a USB1/2 link, from a master,
yyyup.
USB3 requires 5 extra pins
4 coming off the CPU Card. what's the 5th one?
Apparently: GND_DRAIN: Ground for signal return
ok great. thanks mike.
http://en.wikipedia.org/wiki/USB_3.0#Pinouts
Probably it used to "drain" signal leakage from the SuperSpeed cable pairs. But how that is to be terminated on the devices properly, I have no idea. I'm not sure if it's necessary in the EOMA connector either.
no, that's my understanding.
l.