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, gandal...@aol.com wrote:
In a message dated 18/02/2013 22:45:12 GMT Standard Time,
paulsw...@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@gmail.com_ (mailto:elio...@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: elio...@gmail.com
Reply-to: time-nuts@febo.com
To: time-nuts@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: elio...@gmail.com
Reply-to: time-nuts@febo.com
To: time-nuts@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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