[time-nuts] FE-5680 Linux command line tool
shalimr9 at gmail.com
Sat Oct 11 11:45:02 UTC 2014
Most EEPROMs have I2C or SPI interfaces. Some Flash chips have JTAG.
On October 10, 2014 4:47:19 PM CDT, Tom Wimmenhove <tom.wimmenhove at gmail.com> wrote:
>I don't have the clip-ons but of course I could get them. I know the
>has a JTAG interface, but I've only used JTAG with chips that came with
>programmer and software :) (except with OpenOCD over parport once, but
>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.
>On Fri, Oct 10, 2014 at 12:21 PM, Joseph Gray <jgray at zianet.com> wrote:
>> I don't know how crowded the board is, but I would use an SMD DIP
>> instead of unsoldering the chip.
>> Joe Gray
>> On Oct 10, 2014 8:30 AM, "Tom Wimmenhove" <tom.wimmenhove at gmail.com>
>> > I recently came across a thread on this list about undocumented
>> > commands. I have been using a little linux command line tool I
>> > 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
>> > 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
>> > command output that reads the ADC, and in the morning it was no
>> > locked. The 10MHz signal disappears about 5 seconds after power-on,
>> > programmed offset was somehow reset to zero (it had been set to
>> > it appears as if the internal EEPROM has been corrupted.
>> > I read a post from Elio Corbolante where he posted EEPROM and
>> > dumps. Anyone have any idea on how to re-write this firmware back
>> > EEPROM by hand (would this be possible through JTAG, or do I
>> > to solder the chip out of there? :) ) Or maybe there's someone
>> > sell their broken unit I could take the chip out of?
>> > Regards,
>> > Tom
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