Hi Stefan, I understand that it looks strange, but yes it is a small 6-pin package, with I maybe wrongle identified as a 6-pin sot23 (or sot23-6) package. I'm not sure about the pinouts, though (I easily found vdd and vcc, bot on other trace are hard to follow on the board of the graphic card) Whith a magnifier I only manage to read the two letters YU on the package...
What is strange is with those packages I only found datasheets of smaller eeprom (1k, 2k, but not 1 or 2Mbits which is the attempted size regarding the size of bios of those products) I'll run the command and send you photos later this day regards gilles -- Gilles Aurejac Polysoft Services http://www.polysoft.fr Le 6 janv. 2015 à 11:10, Stefan Tauner <stefan.tau...@alumni.tuwien.ac.at> a écrit : > On Tue, 6 Jan 2015 02:54:31 +0100 > Gilles Aurejac <gil...@polysoft.fr> wrote: > >> you're right I did wrote to the flash ship twice (and forgot the -V option >> the first time). >> I'm confident that the write operation worked : I first have read and save, >> then updated this chip (2nd bios chip of a gtx 770 nvidia card) succesfully >> with flashrom and compared with an hexadecimal the 2 dumps which reported >> the attempted differences. >> >> If you wish I can ran the write operation again and send you the result. > > Hi, > > no need, I just wanted to make sure. > I have marked the flash chip as fully tested and will commit that later > together with other small changes. > >> Also I did not have the same success with the 1rst bios chip which is not >> recognized (0Kb) by flashrom, and neither by nvflash under windows (nvflash >> says : unknown eeprom - BF,008D : this is a SST chip) >> This is a 2Mbits spi eeprom with a sot-23 package. > > sot-23 would be pretty spectacular... because that has only 3 pins ;) > I believe you mean SOIC-8 instead. > > SPI flashes can use a few different ID methods which often share (parts > of) ID bytes. 0xBF is indeed the SST vendor ID... and 0x8d is even (the > main) part of a known device: the SST25VF040B. But it should be > detected ok with flashrom. Can you please send us the log produced with: > flashrom -p buspirate_spi:dev=COM5 -VVV -o SST25VF040B_probe_spew.log > Maybe I can spot what/if something is wrong. > > The top marking of the chip would also help very much in verifying if > it is a SST25VF040B or something else. > -- > Kind regards/Mit freundlichen Grüßen, Stefan Tauner
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