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Newbie jh3mail
Newbie
3,159 Views
Registered: ‎01-05-2010

Could SP601 generate a 500Mhz clock using DCM without external clock

SP601:

 

FPGA:Spartan-6 XC6SLX16-CS324

 

Clock Generation
  There are three clock sources available on the SP601.


1.Oscillator (Differential)

The SP601 has one 2.5V LVDS differential 200 MHz oscillator (U5) soldered onto the board
and wired to an FPGA global clock input.
• Crystal oscillator: Epson EG2121CA
• PPM frequency jitter: 50 ppm

 

2.Oscillator Socket (Single-Ended, 2.5V or 3.3V)

One populated single-ended clock socket (X2) is provided for user applications. The option
of 3.3V or 2.5V power may be selected via a 0 ohm resistor selection. The SP601 board is
shipped with a 27MHz 2.5V oscillator installed

 

3.SMA Connectors (Differential)

A high-precision clock signal can be provided to the FPGA using differential clock signals
through the onboard 50-ohm SMA connectors J7(P)/J8(N). 
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Historian
Historian
3,137 Views
Registered: ‎02-25-2008

Re: Could SP601 generate a 500Mhz clock using DCM without external clock

So what do the Spartan 6 User Guide and Data Sheet say about DCM frequencies?
----------------------------Yes, I do this for a living.
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