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This paper presents a Mobile Display Digital Interface (MDDI)-client architecture which is suitable for low-power, small-area, and low-cost mobile applications. Compared to the power dissipation of an MDDI client with a byte counter that has continuous transitions for all packet data, the proposed MDDI client reduces power consumption in state transitions up to 50% by using robust Finite State Machine (FSM) and on-off byte counter. The proposed scheme detects invalid data in packets and turns off the operation of the byte counter to minimize client's power dissipation. The MDDI-client architecture is implemented and verified on FPGA modules.