[Gumstix-users] Using Overo Fire Com with my own expansion board

[YWL <ya...@si...>]

I'm having some problems here. The Overo Com does not seem to work when I
connect it to my own expansion board.

I expect to see a boot-up message from the console output (IR_TXD3), but
right now I'm getting nothing. When I tried monitoring the pin with a scope,
it just remains in low.

Besides power supply and the reset pin(N_MANUAL_RESET), are there any other
special pins I need to take care of? Like from the "sysen" and "poweron"
pins, what should I do with them?

I tried referring to the schematic of Summit Board, but I find the pin
definition of the 2 70-pin connectors quite different from the definition of
J1 & J4 given in the product specification of Overo Coms( 
http://www.gumstix.net/Hardware/cat/I/O-connectors-cabling/112.html Gumstix
documentation ), why is that?

Any help is really appreciated, thanks!
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