FreeLists / si-list / [SI-LIST] Re: SSTL2 classI without RS and RT on short length

[steve weir <weirsi@xxxxxxxxxx>]

Bernard, you might be able to forgo the Rs, but not the Rt.

Regards,


Steve.
At 06:00 AM 4/7/2006, Bernard Esteban wrote:
>Hi,
>
>I'm currently designing a board with fpga(U1) and a chip(U2) where IO
>are in levels SSTL2. Both chip are BGA 1mm and 0.8mm.
>8 IO one-way U1 to U2, and 8 one-way U2 to U1.
>So 16 lines point to point. Clock frequency is 250MHz in single data rate.
>The two chips are very close, less than 1/2 inch.
>I made schematics with Rs and Rt, but they takes a lot of place, even is
>I use fpga integrated Rs.
>I think this could be possible to connect these 2 chips without RS and
>RT, but I dont have a simulator for my PCB router, and so, to validate
>this solution.
>I found some papers and discussions were RT is not used, other paper
>were RS is not used.
>
>Did you try this idea or did you think this idea can works with good
>reliability ??
>
>Regards,
>
>Bernard
>
>--
>Bernard Esteban
>Electronic Design Engineer
>MAF Agrobotic
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