Hi!
I wonder what the CLKGEN_0 bitfield DC_LVPECL_SYSREF_en does. Does it change the termination?
I'm using a HMC7044 with LVDS output connected directly to the sysref input, Vcm is 1.1V, 750mV p-p.
Best regards,
Eirik
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Hi!
I wonder what the CLKGEN_0 bitfield DC_LVPECL_SYSREF_en does. Does it change the termination?
I'm using a HMC7044 with LVDS output connected directly to the sysref input, Vcm is 1.1V, 750mV p-p.
Best regards,
Eirik
Hi Eirik,
Yes, When LVPECL_SYSREF_en is set to 1, each input Pin for SYSREF P/N is terminated to ground through 50 ohms. If LVPECL_SYSREF_en is '0', there is 100 ohms termination between P/N pins of SYSREF signal.
Regards,
Neeraj