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 >546 rue Gustave Jay >BP112 >82001 Montauban Cedex >France >Tel +33(0)563632770 >Fax +33(0)563203459 >Fax alternate +33(0)563630785 >Email: esteban.bernard@xxxxxxxxxx >Email alternate: maf@xxxxxxxxxxxxxx >site web: http://www.maf-roda.com >====================================== >This message contains information, which maybe confidential and >privileged. Unless you are the addressee (or authorize to receive >for the addressee) , you may not use, copy or disclose to anyone the >message or any information contained in the message. If you have >received the message in error, please advise the sender by reply to >bernard.esteban.maf@xxxxxxxxxx and delete the message. >Thanks. >====================================== > > > >------------------------------------------------------------------ >To unsubscribe from si-list: >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > >or to administer your membership from a web page, go to: >//www.freelists.org/webpage/si-list > >For help: >si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > >List FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > >List technical documents are available at: > http://www.si-list.org > >List archives are viewable at: > //www.freelists.org/archives/si-list >or at our remote archives: > http://groups.yahoo.com/group/si-list/messages >Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu