[Gumstix-users] Basic Board Requirements

[krbaker <kei...@me...>]

I'm trying to go a bit beyond a basic breakout...  I want to make a
board with an interface to my LCD (sony), 3 Serial ports, 4 buttons, and
12v power supply.  I have a few questions:

1) Do I need to hold any specific pins high or low on the gumstix?  I'm
routing all of the serial port pins to actual serial ports (through
level converters) so I think thats taken care of.  I see the NRESET pin
which I assuming is Not Reset so I'm assuming I want to hold that high.
Do I need to delay bringing this up for any amount of time ot get the
clock to stabailize as mentioned in the PXA manual?

2) For the buttons on the GPIO pins (I'm stealing the JTAG pins) do I
need to hold / bring them high or low?  I just don't want to duplicate
anything thats already done.

Looks like I should hold them low with a 470k resistor and bring them
high with a 1.5K resitor to VCC???

4) Do I understand the USB interface correctly?

GPIOn is designed to tell the Gumstix that the cable is connected but
needs to be dropped to 3.3v?

GPIOx is left floating (as input), when connect is detected, this drives
high to say this is a high speed device?