When internal signal is used in the high level or LDD component, the component producing the signal might be required by the component. In such case, special component-linking property is used to add required component. This feature is used to guide user to the components that are necessary for correct function of peripheral that depends on signal generated by different peripherals as shown in figure below.
Figure shows AnalogComp_LDD component that uses pin as positive input and internal signal from 12-bit D/A converter (DAC) output as negative input. Selection of internal signal causes that Source component property from the negative input group is active and DAC component is required. User may add new DAC component (DAC_LDD or Init_DAC in this case) or use DAC_LDD component already present in the project (component DA1).