Yes, FPGA support JTAG. But JTAG frequency is low. JTAG test wasn't working because we are out of spec (minimum DDR operating frequency). =20 Best regards, =20 Edi Fraiman > -----Original Message----- > From: Vinu Arumugham [mailto:vinu@xxxxxxxxx]=20 > Sent: Wednesday, August 02, 2006 3:54 PM > To: Fraiman, Edi > Subject: Re: [SI-LIST] DDRAM BUS Testing >=20 >=20 > The FPGA does not support JTAG? >=20 > Thanks, > Vinu >=20 > Fraiman, Edi wrote: >=20 > >Hi, > >=20 > > > >I'm working on a design that includes FPGA with DDRAM controller and=20 > >several DDRAM chips. The traces goings direct from FPGA to=20 > DDRAM with=20 > >necessary pulll up resistor to Vref. (SSTL interface)=20 > without any debug=20 > >connector. > > > >=20 > > > >Sometimes we have productions problems. It is very difficult to find=20 > >what bit in bus between FPGA and DDRAM is shorted or disconnected. > > > >Could somebody give any tips how it's possible debug DDRAM busses in=20 > >terms of production issues. > > > >=20 > >=20 > >Best regards, > >=20 > >Edi Fraiman > >=20 > > > > > > - - - - - Appended by Scientific Atlanta, a Cisco=20 > company - - - -=20 > >- > >This e-mail and any attachments may contain information=20 > which is confidential, proprietary, privileged or otherwise=20 > protected by law. The information is solely intended for the=20 > named addressee (or a person responsible for delivering it to=20 > the addressee). If you are not the intended recipient of this=20 > message, you are not authorized to read, print, retain, copy=20 > or disseminate this message or any part of it. If you have=20 > received this e-mail in error, please notify the sender=20 > immediately by return e-mail and delete it from your computer. > > > > > >------------------------------------------------------------------ > >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:=20 > >//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: =20 > > //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 > > =20 > > > > =20 > > >=20 - - - - - Appended by Scientific Atlanta, a Cisco company - - - - - = This e-mail and any attachments may contain information which is confident= ial, proprietary, privileged or otherwise protected by law. The information= is solely intended for the named addressee (or a person responsible for de= livering it to the addressee). If you are not the intended recipient of thi= s message, you are not authorized to read, print, retain, copy or dissemina= te this message or any part of it. If you have received this e-mail in erro= r, please notify the sender immediately by return e-mail and delete it from= your computer. ------------------------------------------------------------------ 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