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Generally, the analog and digital equipments used in safety- related application in nuclear plant should be procured from qualified supplier that maintained a 10CFR50, Appendix B. Because of a decrease in the number of qualified nuclear-grade vendors, numerous licensees employ commercial grade dedication method to dedicate commercial grade item for use in safety-related application. For digital I&C equipment, dedication of built-in software has some different from analog. The main works including review of software configuration control, verification and validation activity and test activity, etc, to assure the quality of the software. The paper introduces the requirements of USA nuclear law, and NRC’s approved acceptance method and process for digital I&C commercial dedication. The Paper focuses on describing the CGD process and acceptance method of AP1000 protection system AC160 platform. It's helpful for future dedication of digital I&C equipments by civil vendor. 