Most EEPROMs have I2C or SPI interfaces. Some Flash chips have JTAG. Didier KO4BB
On October 10, 2014 4:47:19 PM CDT, Tom Wimmenhove <tom.wimmenh...@gmail.com> wrote: >Thanks Joe! > >I don't have the clip-ons but of course I could get them. I know the >chip >has a JTAG interface, but I've only used JTAG with chips that came with >a >programmer and software :) (except with OpenOCD over parport once, but >that >was in the stone age). > >Another question about the EEPROM dump Elio Corbolante. The chip has a >256Kbit (32KB) EEPROM and the dump is 160K: >-rw-rw-r-- 1 tom tom 160K nov 8 2012 FE5680A_EEPROM.bin > >Which part in this dump is the actual data from the EEPROM? > >Thanks in advance. > >Regards, > Tom > > > >On Fri, Oct 10, 2014 at 12:21 PM, Joseph Gray <jg...@zianet.com> wrote: > >> I don't know how crowded the board is, but I would use an SMD DIP >clip >> instead of unsoldering the chip. >> >> Joe Gray >> W5JG >> On Oct 10, 2014 8:30 AM, "Tom Wimmenhove" <tom.wimmenh...@gmail.com> >> wrote: >> >> > I recently came across a thread on this list about undocumented >FE5680 >> > commands. I have been using a little linux command line tool I >wrote >> years >> > ago for tuning the unit and decided to add these commands to it. >> > Since this mailing list was the place I found the unit (someone >linked to >> > an ebay seller) I figured I' d join the list and throw it on here >:) >> > http://www.tomwimmenhove.com/otherstuff/fe5680-0.2.tgz >> > >> > Now, the bad news. I had my unit running overnight while logging >the >> serial >> > command output that reads the ADC, and in the morning it was no >longer >> > locked. The 10MHz signal disappears about 5 seconds after power-on, >and >> > programmed offset was somehow reset to zero (it had been set to >-645). So >> > it appears as if the internal EEPROM has been corrupted. >> > I read a post from Elio Corbolante where he posted EEPROM and >firmware >> > dumps. Anyone have any idea on how to re-write this firmware back >into >> the >> > EEPROM by hand (would this be possible through JTAG, or do I >actually >> have >> > to solder the chip out of there? :) ) Or maybe there's someone >willing to >> > sell their broken unit I could take the chip out of? >> > >> > Regards, >> > Tom >> > _______________________________________________ >> > time-nuts mailing list -- time-nuts@febo.com >> > To unsubscribe, go to >> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> > and follow the instructions there. >> > >> > >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. -- Sent from my Motorola Droid Razr HD 4G LTE wireless tracker while I do other things. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.