Print Page - External Clock for TE0715 Module

Title: External Clock for TE0715 Module
Post by: rouben_s on August 03, 2017, 06:14:25 PM

Hi there,

I am using the TE0715 modules on a custom board and I provide the MGTREFCLKs from a SI5338 frequency synthesizer on my board. When generating the clock I have several options for the output driver of the SI5338 and for other projects I have used the LVDS option. But when I use the 1.8V LVDS for this design, the voltage swing on the output is below 1V. The only way I get the full 1.8V is by choosing the 1.8V CMOS on both A and B outputs. I would like to know what is the proper driver (I/O) type that I have to specify to interface with the GTX tile of the TE0715.

Thanks,
Rouben

Title: Re: External Clock for TE0715 Module
Post by: JH on August 14, 2017, 08:53:48 AM

Hi,

LVDS should work. On TE0715 Si5338 CLK2 is configured by default to 125MHz with LVDS output. Does this work?

br
John

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Trenz Electronic Products => Trenz Electronic FPGA Modules => Topic started by: rouben_s on August 03, 2017, 06:14:25 PM