6.1 PCB Stack-Up

A minimum of eight layers is required to ensure proper connectivity for signals and power. The following figure shows an example of an 8-layer stack-up.

Each layer can be assigned as follows:

Layer 1 (Top) – Signal
Layer 2 (Inner) – Ground
Layer 3 (Inner) – Signal
Layer 4 (Inner) – Power
Layer 5 (Inner) – Signal
Layer 6 (Inner) – Signal
Layer 7 (Inner) – Ground
Layer 8 (Bottom) – Signal

Figure 6-1. SAMA7D65 8-Layer PCB Stack-Up Example

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