Automated Pre-Silicon Verification of High-Speed DDR5 and LPDDR5/6 Memory Controllers: Closed-Loop Timing, Mode Register, and PHY Synchronization in UVM

External memory interfaces (such as LPDDR5/4 and DDR5) are essential components of modern mobile, cloud, and enterprise computing systems. While memory manufacturers focus on physical DRAM die development, the vast majority of semiconductor firms design custom application ASICs that require a dedica