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OMAP-L138: LCDC module get disabled.

Yee Yong Teo
Expert 4335 points
Part Number: OMAP-L138

Hi Team,

We get exception when trying to access LCD_CTRL register and found that the LCDC module is actually in disabled state after read back MDSTAT16 register. The value read is 0x00000E02.

What could be the possibility the module to go into disabled state?

Thanks.

- YY

  • 0
    TI__Guru 65405 points
    The team is notified. They will post their feedback directly here.

    BR
    Tsvetolin Shulev
  • 0 in reply to Cvetolin Shulev-XID
    TI__Expert 4335 points

    Hi Tsvetolin,

    Any update? We would like to know what could be the possibility it get disabled. All the required step in the datasheet/TRM has been followed exactly.

    Thanks.

    - YY

  • 0
    TI__Guru* 78425 points
    Hi YY
    The LCD module enable/disable state is primarily controlled by PSC module via software. the default power on reset state for LCD module is "SwrstDisable" (MDSTAT.STATE = 0x0) , if you are seeing a value of 0xE02, it would mean that somewhere in software the module has been programmed to disable state (MDSTAT.STATE = 0x2)
    Have you confirmed that this state is not being caused by software known or unknown?

    Do you have any additional information on the failure?
    1) Is it happening on one board or several boards?
    2) Are you suspecting a hardware or software issue?
    3) How have you confirmed that it is not some user software that is disabling the LCD module
    4) You said we get an exception, what exception?
    5) Any additional inputs on the "failure" state? Is the rest of the device operational and all other peripherals that are expected to be clock enabled , enabled?

    Regards
    Mukul