Re: USB port: schematics and PCB

Groepaz <groepaz <at> gmx.net> writes:
> > I can't tell if it is related to EXI or not. (But my guess is that it is
> > not).
> 
> mmmh, maybe that one is related to the mysterious "UART" reference? (its even 
> in yagcd, god knows where i got that one from =P)

In US patent 6,609,977 (now 7,134,960) there is a reference which could confirm
your theory:

"A multi-pin modem connector 1514 is used to connect the graphics and audio
processor 114 to an external or internal modem.
The boot ROM/real time clock 134 is coupled to the modem connector 1514 and
shares its bus for communication with the graphics and audio processor 114."

1514 is the "Serial Port 2" connector.
So that text is claiming that "Serial Port 2" is related to the EXI0 bus, where
the Boot ROM is located.

Cheers,
Albert



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