[time-nuts] FE-5680A DDS Board/PIC Code

[EB4APL]

Hi,

Probably Elio will jump in and tell us more on this, but I must advice 
that the unit where he did his forensic examination was a FE-5680A of 
the 10 MHz fixed frequency output  variety (not accounting for the small 
adjustment margin)and also has a fixed 1 PPS.  This unit doesn't have 
the two blue buttons and is essentially different from the 
"programmable" units.  Its DDS is used in a very different way and the 
PIC program should be totally different.

Regards,
Ignacio, EB4APL


On 18/02/2013 23:54, GandalfG8 at aol.com wrote:
> In a message dated 18/02/2013 22:45:12 GMT Standard Time,
> paulswedb at gmail.com writes:
>
> Herbert
> Thanks for the assembly listing. Someone else on  time-nuts had done quite
> the job of reverse engineering the schematics and  other information. Seems
> like the two of you could collaborate. Sorry do  not recall the name.
> Welcome to  time-nuts.
> Regards
> Paul
> WB8TSL
> ------------------------
>
> Was just thinking the same thing so checked through my archives.
>
>
> That was Elio, _eliocor at gmail.com_ (mailto:eliocor at gmail.com) ,  messages
> posted here about a year ago.
>
>
> The messages will be in the list archives anyway but below is the text of
> two messages I saved.
>
>
> Regards
>
>
> Nigel
> GM8PZR
>
> ----------------------------------------------
>
> From:  eliocor at gmail.com
> Reply-to: time-nuts at febo.com
> To:  time-nuts at febo.com
> Sent: 15/02/2012 01:31:32 GMT Standard Time
> Subj:  [time-nuts] FE-5680A Schematics (v0.1)
>
>
> at the following  address:
> <
> http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680A_schematics_v0.1.p
> df
>>
> you  will find the 0.1 release of the FE-5680A schematics.
>
> New additions:
> -  pinout of the unpopulated (24 pin) connector (J9) behind the DB9
> -  connections between CPU/MAX3232 and the *TWO* serial ports!!!
> - component  values of the 10MHz filter + option on PCB to output a square
> 10MHz wave on  DB9
> - connections between CPU and MAX1246 (A/D converter)
> - connections  between XC9572 and MAX392 (quad analog switch)
> - unknown pins marked as  '?'
>
> As you can see, it seems FE-5680A fully supports 2 serial  ports:
> one on DB9 and the other one on the unpopulated connector (J9) behind  DB9.
>
> Any comments/suggestions are welcome.
>
> .       ciao
> _        Elio.
> _____________
>
> ------------------------------------
>
> From:  eliocor at gmail.com
> Reply-to: time-nuts at febo.com
> To:  time-nuts at febo.com
> Sent: 24/02/2012 01:03:56 GMT Standard Time
> Subj:  [time-nuts] FE-5680A Schematics and scans
>
>
> Thanks to Ignacio (EB4APL) and the generosity of Mike  Harrison, today I
> received a PCB of a disassembled FE5680A.
> I provided to  make some scans of the board at 2400DPI resolution: the
> picture size is about  7700x11500 pixel (9MB)
>
> Top face (with and without  ICs):
> <http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680A_Top001.jpg>
> <http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680A_Top001_noIC.jpg>
>
> Bottom  face (with and without  ICs):
> <http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680A_Bottom001.jpg>
> <
> http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680A_Bottom001_noIC.jp
> g
>>
>
> Being  able to remove the ICs, I was able to correct some flaws in the
> previous  schematics:
> <
> http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680A_schematics_v0.2.p
> df
>>
>
> During  the next week I will continue to write down the logical part of the
> circuit  and I hope will be able to dump the 8032 firmware
>
> _      Elio.
> _________________
>
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