Control Mode

Control mode is the default operating mode. After the initialization is completed (analog calibrations and PLL locking), the D-PHY remains in this default mode until a request is placed. The request is placed either by the protocol layer for transmission, or directly through the sequence of low-power signals in the lanes in case of reception. While in Control mode, the transmitter side sets the LP-11 state in the lines - this is called the Stop state. The receiver side remains in Control mode while receiving LP-11 in the lines. Any request must start from and end in Stop state.

Following a request, a lane can leave Control mode for either High-Speed Data Transfer mode, Escape mode, Ultra-Low-Power state, or turnaround operation.