Help: ICE_FLAGS_MUXCLK=S

IOC code allowing choice of 6 on-board clock sources


Loads IOC code allowing muxed clock operation.  Both modules use the same clock.
Outputs always use MUXCLK.  There 7 possible sources for the muxed clock signal:

   s=N No MUXCLK
   s=I Internal clock = 40MHz/N where N is an integer (1-4096)
   s=A Module A input clock (or s=1)
   s=B Module B input clock (or s=2)
   s=C Alternate Crystal on series 3+ cards
   s=D Alternate Crystal CCLK/N where N is an integer (1-64), (1-16) on series 3
   s=X External clock on series 3+ cards
   s=P Programmable Clock on series 4+ cards
   s=PX Programmable Clock with eXternal reference (PREFX)

Many newer IO modules (especially analog modules) contain their own programmable 
clocks.  These clocks are not shared as the mainboard MUXCLK is.

Note: Specifying MUXCLK=PX is equivalent to MUXCLK=P with PREFX. See PREFX for details.