Custom micro-coded components are widely used in the development of airborne equipment because of its convenience and high efficiency. Due to its high integration and complexity, it is difficult to manage and evaluate the design errors in the development process by traditional methods, and the components use will affect the safety of aircraft. Therefore, the design assurance method is usually adopted to demonstrate the airworthiness compliance of the custom micro-coded component to certification requirements. However, in practical projects, the function implemented by the custom micro-coded component may be relatively simple. The component functionality visibility can be shown by comprehensive combination of deterministic testing and analysis, and safety of component use in airborne equipment can be assured. Based on analysis and research of current advisory circular, industry standards and practical guidelines, the goal is to sort out the relevant requirements of the custom micro-coded component and key elements should be fulfilled to show compliance by comprehensive combination of deterministic testing and analysis to support and help airborne equipment manufacturers apply for airworthiness certification of simple custom micro-coded component.