My FPGA board layout, any comment?

Status
Not open for further replies.
Z

zsuhh

Junior Member level 3
Joined
Jan 29, 2014
Messages
28
Helped
3
Reputation
6
Reaction score
3
Trophy points
3
Activity points
179
Placement layer:


Top layer:


Gnd layer:


Power layer:


Bot layer:
 

Hi,

Please let me know, which FPGA you are using. what are the voltage levels?
 

Hi,

Are there diff pairs on the bottom?
If so they cross split planes on layer 3 that is not right.
They must see a constant gnd or power plane.
 

No any diff pairs on the bottom.
 

If the two connector pairs on above and bellow side are not being used for fastening purpose and it is expected connect for instance a flat cable, you could keep them apart due the edge of one may overlap the space needed to connect the other cable.
 

OK - whats this?


Move the tracks circled in black down so the via circled in blue can be moved so the loop in the track in the top pic can be removed.


I'm not so sure it's a good idea to have copper pour on BGA pads


It always take another pair of eyes to spot something small that could be better.
What software was this done in?
 
Reactions: zsuhh

    Z

    zsuhh

    Points: 2
    Helpful Answer Positive Rating
Thank you very much. I am using allegro to layout.

- - - Updated - - -

spartan 6. voltage is : 3.3v, 1.2v, 1.8v
amit.kumar11 said:
Hi,

Please let me know, which FPGA you are using. what are the voltage levels?
Click to expand...

- - - Updated - - -

Thank you very much. I am using allegro to layout.

 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…