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AM625: Regarding OLDI display

prema R
Intellectual 965 points

Part Number: AM625

HI

We are using AM6254 in our HMI design. We are interfacing display NHD-10.1-1024600BF-LSXP-CTP to interace with AM6254. We have connected 4 pairs of data and 1 clock pair in the OLDI interface. Please let us know if this is fine, also if yes whether clk0 maps to the first 4 pairs of data? I have attached the schematics.please let us know if any concerns in this schematics.OLDI_Int.pdf 

 

  • 0
    TI__Genius 13830 points

    Hello Prema R,

    Thank you for your query !

    In the AM625 DS table Pin Attirbutes I have highlighted the AM625 pins to connect the NHD-10.1 display 4 data lanes and clock lane to.

    If not used, the SoC OLDI0_A4N, OLDI0_A4P through the OLDI0_A7N,OLDI0_A7P  and the  OLDI0_CLK1N, OLDI0_CLK1P pin pairs can be left unconnected. Your display will operate in a single link mode. If you attach a second 4 data lane -  display, to the remaining AM625 OLDI0 pins it will operate in a mirror mode (can not display an independent frame buffer). 

    There are also other pins to connect from your display to the AM625 board (the config. I2C0, reset, INTn, VDDA_1P8, etc.).

    You may wish to refer to the following FAQ on OLDI interface capabilities

    Please expect a follow-up from the schematic review early next week.

    Thanks

    Kind Regards,

    Anastas Yordanov 

  • 0 in reply to Anastas Yordanov
    Intellectual 965 points

    Thanks Anastas, awaiting for your further review comments

  • 0 in reply to prema R
    TI__Genius 13830 points

    Hi Prema,

    I suppose you followed some of the existing AM62 EVM schematic solutions for the OLDI hardware interface + (other TI docs / FAQs like above one) for external protection and other components.

    Please allow us some time to internally review the schematic.

    Thank you !

    Kind Regards,

    Anastas Yordanov

  • 0 in reply to Anastas Yordanov
    TI__Guru**** 228485 points

    Hello Prema, 

    The thread has been assigned to me and i am looking into the OLDI interface and connections.

    If you can share a searchable PDF, the review can be efficient and i can add my comments.

    If the query is only on the mapping of OLDI signal on the SOC side, the mapping looks fine.

    Regards,

    Sreenivasa