Video Mode

DSI supports three formats for Video Mode data transmission

• Non-Burst Mode with Sync Pulses
• Non-Burst Mode with Sync Events
• Burst Mode

Non-Burst Mode with Sync Pulses

 With this format, the goal is to accurately convey DPI-type timing over the DSI serial Link. This includes matching DPI pixel-transmission rates, and widths of timing events like sync pulses. Accordingly, synchronization periods are defined using packets transmitting both start and end of sync pulses.

 

 Non-Burst Mode with Sync Events

This mode is a simplification of the format described Non-burst Mode with Sync  pulses. Only the start of each synchronization pulse is transmitted. The peripheral may regenerate sync pulses as needed from each Sync Event packet received. Pixels are transmitted at the same rate as they would in a corresponding parallel display interface such as DPI-2.

 Burst Mode

In this mode, blocks of pixel data can be transferred in a short time using a compressed burst format. This is a good strategy to reduce overall DSI power consumption, as well as enabling larger blocks of time for other data transmissions over the Link in either direction.

There may be a line buffer or similar memory on the peripheral to accommodate incoming data at high speed. Following HS pixel data transmission, the bus goes to Low Power Mode, during which it may remain idle, i.e. the host processor remains in LP-11 state, or LP transmission may take place in either direction. If the peripheral takes control of the bus for sending data to the host processor, its transmission time shall be limited to ensure data underflow does not occur from its internal buffer memory to the display device.

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