Wayne, You are probabley right, first line. However, I will make a try according to your advice. If I get nowhere, a logic guru is next pull. Will let you know. Inge ----- Original Message ----- From: "Wayne Thayer" <[log in to unmask]> To: <[log in to unmask]> Sent: Sunday, March 11, 2007 3:59 PM Subject: Re: [TN] FPGA (DSP) > Hi Inge! > > Send the board to a logic specialist! > > It sounds like the part isn't configuring. Debugging that usually > requires no more than an oscilloscope, except that it depends on whether > the board designer left access to the important pins. I don't have the > data sheet in front of me right now, but some of the key pins for > configuration include: Two "Mode" pins, which control how the device > configures (slave, where someone else provides the clock; master, where > the Xilinx provides the clock; serial data configuration mode; or > parallel configuration mode); CCLK, which stands for "configuration > clock"; INIT, which can hold off configuration; and DONE, which tells > you whether the device thinks it configured. Also, there is the serial > data line (or parallel data bus for the parallel configuration) which > carries the configuration from the flash to the part. The first thing > to do is to get an oscilloscope on CCLK. If none comes up when the > power is first applied, then probably INIT or the MODE pins are not in > the right state. If there is no movement on the DATA line(s) going from > the flash to the 4013, then maybe someone forgot to program the FLASH. > INIT is mostly an input which causes re-configuration, but if you review > the data sheet for the part, you will also see that INIT is also an > output indicator that something is wrong with the configuration bit > stream. > > As I said, as long as you can get to the signals, you can figure this > out. Even if its a BGA, the ones made at that time had lines running to > the edge of the part which were for "bussing" for gold plating the > wirebond pads. > > Good Luck, > > Wayne Thayer > >>>> [log in to unmask] >>> > Hi all, > TechNet member's knowhow got no limits, so I try this, despite not usual > PWB topic. Have some FPGAs for DSP that don't work at all. CLK A and B > are OK, checked with a scope on the inputs, all 5V Vcc's are OK, but > when I apply stimuli on the various inputs, I get no reaction on any > data outputs. Very primitive test method, I know, but I thought that at > least something would come out to show that the device isn't completly > dead. The flash memory is external, I've tried with both disabled and > enabled flash, nothing helps. I can't remove the FPGAs, so I have to > test them on the assembled board. I've tried various triggers too. An > advanced troubleshooting would include logic analysers, external pattern > generators and a special test adapter. That's for a logic specalist, > which I'm not. My question is this: Does anyone of you have a proposal > how to test, simple way, if the FPGAs are dead or alive? The FPGAs are > Xilinx 4013, made in numbers of 'millions', very popular some years ago. > A fresh board costs 30,000 USD, hoped to escape that cost. > Inge > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 15.0 > To unsubscribe, send a message to [log in to unmask] with following text > in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to > [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to > [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: > http://listserv.ipc.org/archives > Please visit IPC web site > http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 > ext.2815 > ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 15.0 > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to > [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to > [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 > for additional information, or contact Keach Sasamori at [log in to unmask] or > 847-615-7100 ext.2815 > ----------------------------------------------------- > --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------