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Building a board based on the ETRAX 100LX, but due to parts availability
I'm using the Broadcom 5221 instead of the 5201.  The 5221 uses an
external 25MHz clock instead of the internal one the 5201 uses.  I
noticed in section 20.8 of the programmer's manual that pin U12 can be
used to output a 25 MHz clock, or a few other things.  How do I make it
send the clock signal, and does anyone know whether this should do the
job?