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Original question:

DRA821U: Processor part number used on J7200 EVM

DRA821U: Push Buttons used on J7200 EVM

Jitendra rana
Intellectual 370 points
Part Number: DRA821U
Other Parts Discussed in Thread: DRA821

Tool/software:

Hi Team,

Please explain all switch's (SW4, SW5, SW6, SW78, SW10, SW11, application in details in attached images, can we customize some switches if it not necessary too much.

Regards,

Jitendra

  • 0
    TI__Guru** 112055 points

    Hi Jitendra,

    Jitendra rana said:
    Please explain all switch's (SW4, SW5, SW6, SW78, SW10, SW11, application in details in attached images,

    These are Push Buttons. I am not sure what exactly you are asking, but please see the EVM User Guide for details and explanation of the Push Buttons. 

    Jitendra rana said:
    can we customize some switches if it not necessary too much.

    Our EVM is a development board, so this allows us to perform some resets using Push Buttons. I would expect these can be optimized in deployed product boards.

    regards

    Suman

  • 0 in reply to Suman Anna
    Intellectual 370 points

    Hi Team,

    please tell me what is exact use of these "SOC INT1" and "SOC INT2" buttons at page number 18 at attached schematic. are these necessary. by SOC INT1 and SOC INT2 what function we can take. is it necessary to press "CAN_wake" to wake up processor.

    Please 

    7652.PROC079E3D(001)_SCH.pdf

  • 0 in reply to Jitendra rana
    Intellectual 370 points

    I already show below table you shared earlier this for input only, confirm what all output we can take by pressing these button.

  • 0 in reply to Jitendra rana
    Intellectual 370 points

    in below image at page number 18, we are not using USBC, PCI, CSI and cam interface so we should not use these connections in our design please clear. thanks

  • 0 in reply to Jitendra rana
    Intellectual 370 points

    net lebel 'PMIC_PORz " not reaching at processor board from jacinto board as shown in circle in attached image. at page number 11. schematic pdf is also attached. 

    4571.PROC079E3D(001)_SCH.pdf

  • 0 in reply to Jitendra rana
    TI__Guru 52265 points

    SOC INT1 and SOC INT2 are generic pushbuttons to be programed/used for any user event generation or to mimic any other event.  Their use is optional.

    Certainly if your custom design is not using specific portion of the IC (USBC, PCI, CSI) then those portions of the EVM design do not need to be implemented on your custom design - including configuration options for those sections.

    Regarding net PMIC_PORz - that net is sourced from DRA821 SOM board - net is named H_SOC_PROz_1V8

  • 0 in reply to Robert Eschler
    Intellectual 370 points

    Hi Team,

    Thanks for reply.

    I could not find below net lebel in updated processor schematic PROC105E8A. please confirm the same.

    PMIC_MCU_PORz

    SYS_PWR_PG

    CON_SOC_PORZ_OUT

    these are available on jacinto board but reaching at processor board.

    Thanks

    Jitendra

  • 0 in reply to Jitendra rana
    TI__Guru 52265 points

    As you are aware - the EVM is a two board solution:  PROC079 (common base) and PROC105 (processor board).  They interface to each other via board-to-board connectors.  J19, J20 on PROC079 connects with J6, J5 on the processor board.

    The net 'PMIC_MCU_PORz' is net on the PROC079 connects with pin J20.E17.  This connection on the PROC105 would be J5.E17 with net name 'H_MCU_PORz_1V8'.  These two nets are connected together.

    Similar analysis can be done for other nets.

  • 0 in reply to Robert Eschler
    Intellectual 370 points

    Hi Robert,

    Regarding connections "PMIC_MCU_PORz" (J20E-E20) and PMIC_PORz (JB20-B26) from common base board

    you mean to say both connections are coming on 'H_MCU_PORz_1V8' (J5-E17) common processor board.??

    As earlier reply someone told me 'PMIC_PORz' going at H_MCU_PORz_1V8. please confirm.

    please see attached images.

    Thanks,

    Jitendra

  • 0 in reply to Jitendra rana
    TI__Guru 52265 points

    The schematic files are available for download and signals can be traced between board-to-board connectors.  Is there anything else we can help with?

  • 0 in reply to Robert Eschler
    Intellectual 370 points

    Please share exact link and schematic version.

    Thanks,

    Jitendra

  • 0 in reply to Jitendra rana
    TI__Guru 52265 points

    The DRA821 Design files:  Link

    The Common Base Board Design files:  Linik

    The design package file may contain data for multiple board revisions. The naming convention is as follows for PROCxyzEwq_RP where
    - PROC: Indicates TI's Processor Product
    - xyz: Unique ID for this Evaluation Board
    - E: E indicates Pre-Production, blank for Production
    - wq: Indicates Revision (w - Major, blank/q - Minor)
    Pre-Production: 'E' + Num + Letter      ex. E1, E2, E2a, E3, etc.
    Production: Letter + Number     ex. A, A1, A2, B, C, etc.
    - _RP: Release Package Notation

  • 0 in reply to Robert Eschler
    Intellectual 370 points

    Hi Robert,

    I am not getting above text details regarding please schematic version. tell me the latest version number. as per earlier discussion someone told me PROC105E8A is latest processor board and common base board PROC079E3D. are these last updated schematics please confirm. still i am not finding connections matching between them at board-to-board connectors. if these are not latest one please share latest schematic version number inside folder.

    Thanks,

    Jitndra

  • 0 in reply to Jitendra rana
    TI__Guru** 112055 points

    Hi Jitendra,

    Jitendra rana said:
    tell me the latest version number.

    Use PROC079E3D_RP folder from sprr411 package and PROC105E8A_RP folder from sprr424 package.

    Jitendra rana said:
    still i am not finding connections matching between them at board-to-board connectors.

    Robert has answered this earlier. Requoting it here.

    Robert Eschler said:

    They interface to each other via board-to-board connectors.  J19, J20 on PROC079 connects with J6, J5 on the processor board.

    The net 'PMIC_MCU_PORz' is net on the PROC079 connects with pin J20.E17.  This connection on the PROC105 would be J5.E17 with net name 'H_MCU_PORz_1V8'.  These two nets are connected together.

    J20.<PinX> on Common Processor Board would map to the equivalent J5.<PinX> on the DRA821 SoM.

    Here is a side-by-side of the corresponding pin settings

      

    J20B.B26 (PMIC_PORz) is connected to J5B.B26 (H_SOC_PORz_1V8).

    If you are using this as a reference for your board design, use the latest schematic versions. If you have a DRA821 EVM board on your desk, and trying to look up the schematics, then use the versions matching the actual board version you have.

    regards

    Suman

  • 0 in reply to Jitendra rana
    TI__Guru** 112055 points

    Hi Jitendra,

    Jitendra rana said:

    Regarding connections "PMIC_MCU_PORz" (J20E-E20) and PMIC_PORz (JB20-B26) from common base board

    you mean to say both connections are coming on 'H_MCU_PORz_1V8' (J5-E17) common processor board.??

     I am not sure what your confusion is. The following are the connections.

    J20E.E17 (PMIC_MCU_PORz) <-> J5E.E17 (H_MCU_PORz_1V8)

    J20B.B26 (PMIC_PORz) <-> J5B.B20 (H_SOC_PORz_1V8)

    H_MCU_PORz_1V8 net is different from H_SOC_PORz_1V8 net

    regards

    Suman

  • 0 in reply to Suman Anna
    Intellectual 370 points

    Thanks, Suman. it was error from my side.

    Please share below connection details i could find this on processor board. if you have, please share board to board pins mapping details for both board.

    SYS_PWR_PG (J20E-E25)

    and attached image from PROC079E3D common base schematic from 33 out of 68 page number. i could not find all 3 net lebels in marked circle at PROC105E8A processor board. please help the same.

    Thanks,

    Jitendra

  • 0 in reply to Jitendra rana
    TI__Guru** 112055 points

    Hi Jitendra,

    Please open a new thread. This thread has already deviated from your original push button query. The picture you are mentioning did not come through.

    regards

    Suman