Stats

  • Locked Locked
  • Replies 3
  • Subscribers 166
  • Views 13279
  • Members are here 0
More Content
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Do I need termination resistors for low speed RAM?

Leeya

Hi, I am doing a desing with FPGA and RAM, The RAM is running at about 200 MHZ (Not a DDR3).

Do I have to put termination resistors in this design? The PDF file doesn't say anything~~

Is there any frequency mark, that I have to put termination resistor? 

  • VelmuruganM

    Hi Leeya,

    For  200MHz operation we may not need the termination resistor.

    Thanks

  • VincentS

    It has been my experience that series termination is needed. A good way to determine a starting value and location is by using a simulation tool like Hyperlynx. If you do not have access to simulation tools I would put series termination footprints in the board design and install 0 ohm jumpers so the design can be evaluated on the bench. If needed you can add what ever value gives you satisfactory results without respinning the board.

  • Leeya

    I do believe they may need termination resistors~But this time, I just leave it alone, I will do a SI analysis tomorrow~~

    Thanks for reply~ 

Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.