Autodesk Eagle 8 - BGA autorouting doesn't work. Crashes.

[wingedpower]

OS: Mac OS X 10.x

Eagle: Version 8 for Mac OS X 10.x

Put on a BGA(any size/kind, ranging from small 32 to 560 BGA). Attempt BGA autorouting, selected the BGA IC/UC. It runs, never goes above 0% and then the routing window goes away or the Eagle program as a whole crashes.

This is with default settings. When I change the settings so that the lines are thinner or the clearances are thinner to allow thinner traces, it still crashes.

There is no swapping when this happens it and it doesn't show me what the error was. It just crashes.

BGA auto-routing/escape routing is kind of important, but right now, it's basically doing nothing. 

I did get it to sort of route a bit when I had two BGA and links between them. But it only routed a 3-4 traces and stopped. It only routed them for one BGA device and only to the edge of the device. I was never able to get it to repeat it again without crashing.

What's going on? What's the fix?

[wingedpower]

Thanks! I hadn't realized the standard edition supported 4 layers! Giving that a try on some boards, thanks!

[jorge_garcia2]

Hi wingedpower,

The next update which is due in the next few weeks will have the 4 layer support, we didn't have it at the time of release.

Hope this helps.

Best Regards,

[arslanmunir.375]

Hi

I'm using Eagle 9.1.0 and I'm using a 4 layer pcb for my circuit and using Allwinner h3 processor in my design(a bga pkg) and when i click the auto route BGA it goes to solving part and thats it, it stucks there at 0%. Can you tell me what I'm doing wrong? I've followed the instructions at this thread but nothing happend. Kindly advise me what i should do to make it working?

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@jorge_garcia2 wrote:
Hi Wingedpower,

The devs just informed me that they found the issue and have corrected it in the code. The next update will have it incorporated and you should see a lot more happening then.

Let me know if there's anything else I can do for you.

Best Regards,

---

Arslan Munir

[rachaelATWH4]

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@arslanmunir.375 wrote:

I'm using Eagle 9.1.0 and I'm using a 4 layer pcb for my circuit and using Allwinner h3 processor in my design(a bga pkg) and when i click the auto route BGA it goes to solving part and thats it, it stucks there at 0%. Can you tell me what I'm doing wrong? I've followed the instructions at this thread but nothing happend. Kindly advise me what i should do to make it working?

Hello,

I just had a quick look at that Allwinner H3 and it's a 0.65mm pitch BGA. In order to be able to route out of parts like this without violating DRC you have to be particularly careful about having suitable DRC parameters setup and having appropriate trace widths and clearances defined. If you try and route out manually, does the Live DRC show any errors? If it does then this is why the BGA router is stuck at 0% as it will not violate DRC.

I don't use the BGA router as I can do BGA routing more easily by hand but I did do some experiments with it last year which I wrote up in a blog post on element14 here: EAGLE v8: Taming the BGA Router

Best Regards,

Rachael