SPRUJ81A February   2023  – January 2025 AM62A1-Q1 , AM62A3 , AM62A3-Q1 , AM62A7 , AM62A7-Q1 , AM62D-Q1

 

  1.   1
  2.   Trademarks
  3. 1 Introduction
  4. 2 Width/Spacing Proposal for Escapes
  5. 3 Stackup
  6. 4 Via Sharing
  7. 5 Floorplan Component Placement
  8. 6 Critical Interfaces Impact Placement
  9. 7 Routing Priority
  10. 8 SerDes Interfaces
  11. 9 DDR Interfaces
  12. 10Power Decoupling
  13. 11Route Lowest Priority Interfaces Last
  14. 12Summary
  15. 13References
  16. 14Revision History

4 Via Sharing

The FC-BGA pattern implemented on the AM62Ax/AM62Dx design offers opportunities for via sharing. Vias are shared across BGA pins. Figure 4-1 and Figure 4-2 show the via sharing opportunities for VDD_LDDR4 and VSS power supplies, respectively. Via sharing across BGA pins provides for easier escape routing and also robust electrical connection by connecting multiple pins.

Via Sharing for VDD_LPDDR4 Domain Figure 4-1 Via Sharing for VDD_LPDDR4 Domain
Via Sharing for VSS Figure 4-2 Via Sharing for VSS