Expansion interface: the tuning begins

I finished connecting all of the expansion nets tonight. The current route is committed on my Titan Github page. The principle trade-off was that I had to use some long traces. Figure 1 shows the current state of the route. I've also listed the minimum and maximum trace lengths for each DDR data group in Table 1. As I start tuning the trace lengths, I may re-route some nets to make the design easier to tune (both by balancing layer usage and shortening the longest routes).

Figure 1. Expansion Route (All Nets Connected, Pre-tuning).

Expansion Header P3			Expansion Header P5
A_DQ0 min	1239.646		B_DQ0 min	1718.488
A_DQ0 max	3388.985		B_DQ0 max	2966.341
A_DQ1 min	1059.547		B_DQ1 min	1248.02
A_DQ1 max	1604.663		B_DQ1 max	3499.98

Table 1. Net Minimum and Maximums.