It's a chip (PSD813F) which has 1MBit flash, 16Kbit SRAM and 256Kbit EEPROM. It's old school with parallel data/address bus and all that :) It does have JTAG.
Regards, Tom On Sat, Oct 11, 2014 at 7:45 AM, Didier Juges <[email protected]> wrote: > 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 < > [email protected]> 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 <[email protected]> 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" <[email protected]> > >> 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 -- [email protected] > >> > To unsubscribe, go to > >> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> > and follow the instructions there. > >> > > >> > > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > >_______________________________________________ > >time-nuts mailing list -- [email protected] > >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 -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
