Warning: If you are here then you
agree that I cannot be held at fault should you
damage your hardware as this is
untested/unproven content.
The Cypress CY28341 Clock Generator is found on
the FIC AM37 motherboard used in quite a few
eMachines models. The CY28341-2 is also for the
most part identical so the following mod will
work on it also. The CY28341/CY28341-2 can be
found on quite a number of Athlon and P4/Celeron
motherboards using the VIA P4M/KM/KT/266/333/400
chipsets.
Tools Needed:
1x Soldering Iron
1x New very small/fine tipped solder tip
1x Some solder lead
4x 10K Resistors
Some Small wires.
Some free time.
Before doing this you should remove the
motherboard from the case and remove everything
from the motherboard (such as cpu and ram and
such) just to be safe and for extra free space.
Make sure you're discharged of any static
electricity and wear an anti-static wrist strap.
It should be noted I haven't tested this and its
only theory as I haven't a motherboard with the
CY28341/CY28341-2 Clock Generator.
If you test this and find it to work please
please email me at:
-e-n-i-g-m-a--d-e-a-d-s-o-u-l-s- -a-t-
-y-a-h-o-o- -d-o-t- -c-o-m-
(remove all dashes, replace "-a-t-" with "@" and
"-d-o-t-" with "." I do that so the spam bots do
not pick up my email address)
It's recommended you do some cpu benchmarks
before and after to see what kind of performance
gain you might have gained! You might use
SiSoft's Sandra or some other popular
benchmarking test to get a good idea. When
emailing me send me your test results and
screenshots as long as they are under 640x480
and 50kb in size.. also send me pictures of your
modded CY28341/CY28341-2 PLL, and give me your
website info if you wish for me to post it at
the bottom of this page.
Here is an image of the Pin-Out of the
CY28341/CY28341-2.
Here is an list of supported FSB's of the the
CY28341/CY28341-2
NOTE:1011 on the CY28341-2 is 166.6MHz.
We are going to leave all of the pins connected
as they are all I/O pins. First we need to
connect power to the jumper blocks for logic
"1", to do this we will use VDDC (Pin 51) which
supplies a nice 3.3v. Connect VDDC to pin 1 on
the jumper blocks like shown in the picture
below. Now we need to connect ground to the
jumper blocks for logic "0", for this we are
going to connect VSSD (Pin 39) to pin 3 on all
of the jumper blocks like shown in the picture
below. Next we are going to connect FS0 (Pin 1)
to pin 2 on the fourth jumper block with a 10K
resistor inline, then FS1 (Pin 10) to pin 2 on
the third jumper block with a 10K resistor
inline, then FS2 (Pin 21) to pin 2 on the second
jumper block with a 10K resistor inline, and
finally FS3 (Pin 20) to
pin 2 on the first jumper block with a 10K
resistor inline, all like shown in the picture
below.
Note: If FS0 is left disconnected it will
default to logic "1".
If FS1/2/3 are left disconnected they will
default to logic "0".
If
you already have some jumpers on the motherboard
that allow to adjust a few of the settings (such
as the FIC AM37 has a jumper that allows you to
adjust the setting of FS1) you will need to
remove the jumper from the motherboard, or you
can save a bit of time by only making jumpers
for the FS pins you don't have jumpers for.
Now to overclock, using the FSB chart above, if
it calls for a logic "1" on FS0 connect the FS0
jumper block middle FS0 pin to the VDDC pin on
the jumper block, if it calls for logic "0"
connect the middle FS0 pin to the VSSD pin on
the jumper block. The same hold true for all of
the pins. Using the above FSB chart as a key it
will tell you what to set each pin to for
various FSB's.
Written at: 03:30 AM EST, Tuesday, April 5th,
2005 - Revision 0
Written by: Enigma Deadsouls
Website: http://www.geocities.com/enigmadeadsouls
Names/Info from people who have emailed me their
test results:
None at this time.
You are free to mirror this page as long as you
give me credit and do not change any of the info
unless you ask me first... however you're free
to change text font, size, color background
color/image to match you're site. You're also
free to remove my navigation bar at the bottom
of this page as I'm sure it would be pointless
on your site... in other words I'm ok with
changes as long as its not to the info unless
otherwise approved by me. Also if you mirror it
email me and
give me a link and Ill link to it here.
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