questions about PCB layout of TMS570LS3137

Hello Jiaming,

I have forwarded your post to one of our experts.  They will respond back soon.

this link may be helpful:

https://www.protoexpress.com/hdi/hdi-tools.jsp

Hi Jiaming,

For product, reducing the PCB cost is most important. PCB cost is affected by many factors, generally increasing in cost as:

1. Overall PCB area increases

2. As the number of layers increases

3. As the diameter of the through-via decreases

4. As the trace width decreases below 5 mils

6. As the space between metal features decreases below 5 mils

The selection of via size, land pad size, trace width and spacing depends on your board definition. In my HDK design, I use 5mils for trace width/spacing, 16RD8 for via, and 14mils for BGA land pad. 

regards,

Qingjun

Thank you for your reply.

I use 16mil for BGA pad ,and 16mil for through-via ,and the distance between pad and via can be a little more than 5mil.