but the best solution would be to find a way to scan the inner layers ... grinding down, layer by layer ? how to achieve this ? does someone have acess to a tomograph ? other proposals ?
sto tof a écrit : > Hello cory > > this will not help much, most traces are in the inner layers. > I suppose it's a 6 layer buildup... > > but i have a 3G board, with some IC's removed, i can eventually try to > remove everything, and scan it... > > sto > > > > Cory Walker a écrit : >> THis is good news! Also great that Dan Andrews can donate a 2G to you. >> Would it be possible to scan the 2G board without the processor? I don't >> know if there are any exposed traces, but It would still be nice to have >> a picture to look at. If we could get a hold of a 3G, I think it would >> be a good idea to scan the traces under it's processor. I know the RAM >> bus is exposed on that one (just look at the pictures). We could see >> which pins control the RAM. >> >> On Sun, 2009-05-31 at 22:49 +0900, tof wrote: >>> Hello everybody >>> >>> >>> >>> some fresh news from the pinout !! >>> >>> with some patience i identified a good number of the pins. >>> http://f4eru.free.fr/8701/ >>> >>> if we can finish this task, the (brute force) finding of the JTAG could >>> be very close !! >>> >>> seems there are around 30 new pins, due to the muxing of the NOR flash >>> and the RAM. >>> >>> This muxing is cool for us, coz we can emulate the flash + sdram with >>> less connections to the emulating fpga.... >>> >>> >>> a lot of pin patterns correspond exactly to the 8700 order! >>> >>> I also wonder of the 1.5V instead of 1.2V, and the "PWR C"(as i called >>> it, because i don't have the value) >>> >>> Also, the main XTAL is an active oscillator, strange for me, this >>> probably costs more than a naked crystal.... >>> >>> >>> also, as some pads are wiped off, on my board, it would be very very >>> helpfull to get another broken IN2G >>> >>> >>> >>> Sto >>> >>> >>> >>> tof a écrit : >>>> Hello everybody. >>>> >>>> >>>> I did not have a lot of time in the last months, but now i'm back and >>>> alive ;) >>>> >>>> I made very interesting investigations onthe 8701. >>>> >>>> first results : >>>> >>>> http://l4n.clustur.com/index.php/Main_Page/S5L8701_analysis >>>> >>>> http://f4eru.free.fr/8701%20pinout.ods >>>> >>>> >>>> >>>> The bad news : the pinout seems to be very different than the 8701, >>>> there is a different clock system at least in the chip. >>>> >>>> Therefore it will be very hard to locate jtag pins, etc... >>>> >>>> What could be extrmely helpful would be to have decapsulated chips to >>>> view under the microscope. >>>> Does somebody here have an opportunity to acess decap. equipment? or at >>>> least a contact where we could do this cheaply ? >>>> >>>> >>>> More to come soon >>>> >>>> Sto >>>> >>>> >>>> _______________________________________________ >>>> Linux4nano-dev mailing list >>>> [email protected] >>>> https://mail.gna.org/listinfo/linux4nano-dev >>>> http://www.linux4nano.org >>>> >>> _______________________________________________ >>> Linux4nano-dev mailing list >>> [email protected] >>> https://mail.gna.org/listinfo/linux4nano-dev >>> http://www.linux4nano.org >> >> _______________________________________________ >> Linux4nano-dev mailing list >> [email protected] >> https://mail.gna.org/listinfo/linux4nano-dev >> http://www.linux4nano.org > > _______________________________________________ > Linux4nano-dev mailing list > [email protected] > https://mail.gna.org/listinfo/linux4nano-dev > http://www.linux4nano.org _______________________________________________ Linux4nano-dev mailing list [email protected] https://mail.gna.org/listinfo/linux4nano-dev http://www.linux4nano.org
