Document advanced BGA breakout fanout

[seveibar]

Summary

• replace the lead <breakout /> example with an advanced 100-pin BGA fanout
• configure bus directions, escape layers, boundary padding, and pour-net plane drops directly on <breakout>
• route two contiguous 8-bit outer-pin buses toward explicit left/right exits
• drop center-region GND/VCC balls into mapped inner1/inner2 copper-pour planes
• move the two bus endpoint chips farther from the BGA
• remove the unnecessary <autoroutingphase> from the example and prose

Dependencies

• tscircuit/props#770 exposes the shared fanout controls on BreakoutProps
• tscircuit/core#2947 reads those controls from the breakout routing group when no phase overrides them

Why

The common one-stage breakout case should not require a nested routing phase. The example now presents the intended API directly on <breakout> while showing the usual BGA pattern: clustered signal buses on perimeter balls and power/ground escapes from the center of the array.

Validation

• compiled and routed the exact extracted preview against the local props/core branches with no <autoroutingphase>
• verified no autorouting, trace, pad-clearance, or via-clearance errors
• verified vias terminate on both inner1 and inner2
• bun run build
• bun run typecheck
• git diff --check

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview	Jul 31, 2026 2:33am