Highly configurable Enterprise Flash Controller for ONFI 5.2 and Toggle NAND with NV-LPDDR4 mode, device-independent RTL, and software-defined command sequencing for high-throughput SSD designs. EFC provides 16–256-bit datapaths (PHY 16/32-bit), supports volume addressing, suspend/resume, two-pass programming, multi-plane & async plane-read, and can run a UI asynchronous to the flash interface. Per-device or wired-OR Ready/Busy is configurable. Up to 256 LUNs/channel with virtual LUNs to right-size gate count; independent, pipelined command/data/report interfaces allow multiple in-flight commands to different CS/LUNs. Delivered as technology-independent RTL with complete HVL/UVM testbench, docs, and FPGA prototype netlist.