Compliance with the PCIe 3.0 Base Specification is standardized by the PCIe 3.0 PHY IP with PIPE 4.3 interface standard. Because the low power mode option is programmable, the PHY is also particularly useful for a variety of applications with varied power consumption needs. The inclusion of an extra PLL control, reference clock control, and built-in voltage regulation control allows for this Low power utilization. Utilizing a test bench created in Verilog HDL, NCVerilog simulation software is used to verify PCIe PHY operation.