10/25/2022 0 Comments Dsxpnm serial interfaceHigh speed mode is still designed to reduce power usage due to its low voltage signaling and parallel transfer ability. Clock speeds vary by the requirements of the display. High speed mode enables the high speed clock (at frequencies from tens of megahertz to over one gigahertz) that acts as the bit clock for the data lanes. In this mode, the data rate is insufficient to drive a display, but is usable for sending configuration information and commands. In low power mode, the high speed clock is disabled and signal clocking information is embedded in the data. The link operates in either low power (LP) mode or high speed (HS) mode. That is, if 4 lanes are being used, 4 bits are transmitted simultaneously, one on each lane. When more than one lane is used, they are used in parallel to transmit data, with each sequential bit in the stream traveling on the next lane. All lanes travel from the DSI host to the DSI device, except for the first data lane (lane 0), which is capable of a bus turnaround (BTA) operation that allows it to reverse transmission direction. Each lane is carried on two wires (due to differential signaling). This bus includes one high speed clock lane and one or more data lanes. 4.5Gbit/s/lane for D-PHY 2.0 ) differential signaling point-to-point serial bus. ( July 2021)Īt the physical layer, DSI specifies a high-speed (e.g.
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