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

[GandalfG8 at aol.com]

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.
_________________