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SN65DSI86: CSR 0x40 - 0x45 MVID/NVID

Augusto Alvarez
Prodigy 30 points
Part Number: SN65DSI86

Tool/software:

How does the reported MVID/NVID CSR 0x40-0x45 calculation differ when the SN65DSI86 clock source is driven by a 27Mhz local REFCLK versus a clock source driven by a 486Mhz DSIACLK?

  • 0
    TI__Mastermind 39435 points

    Hi Augusto,

    I'm looking into this now.

  • +1 in reply to Vishesh Pithadiya
    TI__Mastermind 39435 points

    Hi Augusto, 

    Here is some background into the question:

    When using the DSI clock as the clock source for eDP. This stream clock and the link symbol clock are derived from the same source. when both clocks are derived form the same source, then the relationship between M/N is the relationship between stream clock/ link symbol clock. In synchronous mode the DP source may choose a steam clock frequency that allows for a static and relatively small Mvid and Nvid values. 

    When using the REFCLK the stream clock (DSI) and link symbol clock (REFCLK) will be from different sources.