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Questions for Sleep mode , Proj_on, DLPA200x thermistor connection

Rossinag
Expert 1705 points
Other Parts Discussed in Thread: DLP2010, DLPC3430, DLPA2000, TIDA-00325

Dear All,

Thank you for your support. Please let me ask you the DLP2010 chipset questions as below. 

1. Would you please provide advice about how to enter the sleep mode by the software control? It looks like there is no sleep command. Can user control the DLPC3430(5) projection system into sleep mode(and immediately wake-up mode) by simple and less I2C command control? It's better the sleep mode means that LEDs off and DMD parking, I think.
2. PROJ_ON
Should the PROJ_ON set to high  for both the DLPC3430(5) and DLPA2000(5) at the same time when the power-on timing? Also, how about the power-down timing case?
3. DLPA200x thermistor connection
We know the PMIC DLPA2000(5) has the thermistor connection capability from the information of the data sheet. Does the DLPC3430(5) firmware utilize the DLPA2000(5)'s thermistor input? If yes what is its function?

Best regards,

Rossinag

  • 0
    TI__Mastermind 28005 points
    Hello Rossinag,

    Let me attempt to address each of your questions individually.

    1. There is not a formal sleep mode for your to toggle via I2C command, but the functional mode of the system can be toggled via the PROJ_ON pin. PROJ_ON is controlled by the front-end chip.

    2. Please refer to section 1.1 of the software programmer's guide (www.ti.com/.../dlpu020a.pdf). As we can see in Figure 1, PROJ_ON is controlling the LED driver and controller at the same time. I also recommend you view the EVM reference design (www.ti.com/.../tida-00325) for more information on how to set up PROJ_ON.

    3. Yes, the firmware does utilize the thermistor. In particular, it reads from the thermistor in order to maintain an internally-controlled temperature reading.
  • 0 in reply to Philippe Dollo
    Expert 1705 points

    Hello Philippe

    Thank you for your  answers.

    Please let me confirm my basic things.

    1. There is not a formal sleep mode for your to toggle via I2C command, but the functional mode of the system can be toggled via the PROJ_ON pin. PROJ_ON is controlled by the front-end chip.

    2. Please refer to section 1.1 of the software programmer's guide (www.ti.com/.../dlpu020a.pdf). As we can see in Figure 1, PROJ_ON is controlling the LED driver and controller at the same time. I also recommend you view the EVM reference design (www.ti.com/.../tida-00325) for more information on how to set up PROJ_ON.

     

    Can the setting PROJ_ON low make the system to  DMD parking and LED off after system power-on?

    After above situation , can setting PROJ_ON high enable system wake-up?

     

    3. Yes, the firmware does utilize the thermistor. In particular, it reads from the thermistor in order to maintain an internally-controlled temperature reading.

    It seems the SENS2 of DLPA2000(5)  connects to the temperature sensor(thermistor). Do you mean the DLPC3430(5) firmware utilize the SENS2's temperature sensor ? If so, is there a number of TI specified  temperature sensor for DLPA2000(5)?

    Best regards,

    Rossinag

  • 0 in reply to Rossinag
    TI__Mastermind 28005 points

    Rossinag,

    "Can the setting PROJ_ON low make the system to  DMD parking and LED off after system power-on?

    After above situation , can setting PROJ_ON high enable system wake-up?"

    This is correct.

    "It seems the SENS2 of DLPA2000(5)  connects to the temperature sensor(thermistor). Do you mean the DLPC3430(5) firmware utilize the SENS2's temperature sensor ? If so, is there a number of TI specified  temperature sensor for DLPA2000(5)?"

     

    I would like to direct you to the DLP2010EVM reference design, which can be located at http://www.ti.com/tool/tida-00325

    If you check the implementation of the DLP board, you can see the implementation of the thermistor design which connects to SENS2 (link at http://www.ti.com/lit/pdf/tidrbl3)

    If you have further questions, please let me know.

    Regards,

    Philippe Dollo

  • 0 in reply to Philippe Dollo
    Expert 1705 points

    Hello Philippe

    Thank you vey much for your help.

    Best regards,

    Rossinag

  • 0 in reply to Philippe Dollo
    Expert 1705 points

    Dear Philippe,

    Thank you for your support.

    LcrDisplay2010EVM's thermistor seems to sense ambient temperature.

    With regard to location of the thermistor , is there any place TI recommends?

    Customer ask this question. Would you please provide advice?

    Best regards,

    Rossinag

  • 0 in reply to Rossinag
    TI__Mastermind 28005 points
    Hello Rossinag,

    The location of the thermistor is flexible, and depends on what you are trying to do with the design.

    For example, if you are interested in the running temperature of the light engine, you may place the thermistor inside it. Otherwise, you may be more interested in the ambient outside temperature. The designer has freedom in how they employ the use of the thermistor.

    I hope this helps.

    Best Regards,
    Philippe Dollo