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TDA3XEVM: sbl can not work normal

tim zhao
Intellectual 981 points

Part Number: TDA3XEVM

Hello TI

We use external flash programmer device to download sbl_qspi_opp_od_ipu1_0_release.tiimage to external qspi flash.

Then switch sysboot mode to QSPI_4 Mode(sysboot[4:0] = 10001, when power on target board, there is no any message

are printed on com port.

So i have some questiong to clarify:

1. After power on reset ,no matter whether the sbl program is correct or not, the rom code will always send AL! to the serial port ,this is correct or not?

2. Does the start run address of sbl start from 0x0?

3 . What is the maximum QSPI Flash size supported by TDA3X?

4.We use MT41J128M16HA-125 this ddr3, from MT41J128M16HA datasheet , Its address space is Add[13:0], But our schematic is connected with A14...A0, is there a problem?

 

 

  • 0
    TI__Guru 50045 points
    tim zhao said:

    1. After power on reset ,no matter whether the sbl program is correct or not, the rom code will always send AL! to the serial port ,this is correct or not?

    Only when UART boot is enabled.

    tim zhao said:
    2. Does the start run address of sbl start from 0x0?

    No, ROM code start from 0x0. SBL is loaded to OCMC starting at 0x300000 (aka PA 0x40300000).

    tim zhao said:
    3 . What is the maximum QSPI Flash size supported by TDA3X?

    Please refer to TDA3 Technical Reference Manual.

    tim zhao said:
    4.We use MT41J128M16HA-125 this ddr3, from MT41J128M16HA datasheet , Its address space is Add[13:0], But our schematic is connected with A14...A0, is there a problem?

    A14 would be don't care then to DDR.

  • 0 in reply to Stanley Liu
    Intellectual 981 points

    Hi

    Stanley Liu said:
    Only when UART boot is enabled.

              ==> Your means when qspi boot mode ,rom code can not send AL!  ,this is correct or not? If so ,how do we debug the SBL?

         

    Stanley Liu said:
    2. Does the start run address of sbl start from 0x0?

    No, ROM code start from 0x0. SBL is loaded to OCMC starting at 0x300000 (aka PA 0x40300000).

              ==> We use external flash programmer device to program qspi flash, the starting address for burn is 0x0, this is ok ?

  • 0 in reply to tim zhao
    TI__Guru 50045 points
    tim zhao said:
    Your means when qspi boot mode ,rom code can not send AL!  ,this is correct or not? If so ,how do we debug the SBL?

    Depending on SYSBOOT pins configurations, it could have UART boot as one of the boot options in addition to QSPI_4 boot.

    tim zhao said:
    We use external flash programmer device to program qspi flash, the starting address for burn is 0x0, this is ok ?

    This is correct. SBL should be programmed to 0x0 in flash.

    Regarding to your issue, some flash device requires a register to be programmed to start in QSPI-4 mode by default.

    Please review the flash device datasheet to see if that is the case.

    Or, you can try QSPI_1 boot mode instead.

    Regards,
    Stanley

  • 0 in reply to Stanley Liu
    Intellectual 981 points

    Hi Stanley

    Ok, we will check tda3x TRM and qspi flash device datasheet.

    Thanks for your reply!