Energy consumption data interface control

The present invention discloses an apparatus and a technique related to energy control data interface. When no data transfer module during data transmission, sometimes a plurality of data transfer module member is selectively converted between its normal operation and low power consumption state. For example, to make a judgment to be converted to their reduced power states of specific components based on the respective time characteristics of a plurality of components and / or power consumption characteristics of each of the plurality of members. In some embodiments, the return to normal operation when the data transmission module, perform an action to reduce the data transmission module on power-up time. In the case of having a data transmission connection for each respective module in a multi-connection port may be set to a low power state that the connector part is powered by the sub-transformation data transmission module.