SPRAD66B February 2023 – December 2024 AM62A3 , AM62A3-Q1 , AM62A7 , AM62A7-Q1 , AM62D-Q1 , AM62P , AM62P-Q1
This application report describes how to plan, route, and simulate a PCB for successful LPDDR4 operation on AM62Ax, AM62Px, AM62Dx processor designs. Topics include board layout guidelines, board stackup, supported implementations, schematics, component placement, and trace length matching targets. Specifications are provided for the clock and address or control signal group and data group topologies. Designing to these metrics helps to achieve a board layout with first-pass success. The simulation section of this application report documents a procedure for confirming the layout meets the requirements for a robust system before board fabrication. The topics of board model extraction, drive-strength and termination optimization, system-level simulation, and eye mask minimums are presented with examples from actual board designs.