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LP5891Q1EVM: What is the maximum wiring distance when connecting TMS320F280039C LaunchPad and LP5891Q1EVM via CCSI?

yongjoon choi
Prodigy 10 points
Part Number: LP5891Q1EVM
Other Parts Discussed in Thread: TMS320F280039C, , MSP-EXP430F5529LP, LP5891

1. What is the maximum wiring distance when connecting TMS320F280039C LaunchPad and LP5891Q1EVM via CCSI?

2. What is the maximum screen frame when using  TMS320F2800x? 

3. What communication was used to operate the LP5891Q1EVM with the MSP-EXP430F5529LP demo? (Does MSP430 provide CCSI functionality?)

  • 0
    TI__Mastermind 31230 points

    Hi,

    Our expert is out of office and will give you feedback when comes back.

  • 0
    TI__Expert 8555 points

    Hi Yongjoon,

    yongjoon choi said:
    1. What is the maximum wiring distance when connecting TMS320F280039C LaunchPad and LP5891Q1EVM via CCSI?

    depend on stray parameter of your cable and the fre. of clock. how long do you want to support now?

    yongjoon choi said:
    2. What is the maximum screen frame when using  TMS320F2800x? 

    depend on your cascading device number and line number

    yongjoon choi said:
    3. What communication was used to operate the LP5891Q1EVM with the MSP-EXP430F5529LP demo? (Does MSP430 provide CCSI functionality?)

    no, it use SPI(data) + GPIO(Clock) to simulate CCSI. but it is not stable so that why we didn't suggest to use it. good news is that currently we have a device called zeppelin which can convert standard SPI to CCSI to drive LP5891 and the engineering sample is ready.

    BR

    Monet Xu 

  • 0 in reply to Monet Xu
    Prodigy 10 points

    Hello Monet
    Thank you for your reply.
    I have additional questions.

    1. As far as I know, the maximum external frequency of LP5891Q1 is 50MHz. Is stable communication possible up to 1 meter?


    2. Is it possible to transmit a 60FPS video using TMS320F2800x under the following conditions?
    - cascading device number : 4 (LP5891Q1)
    - Line number : 64 lines

    3.Thank you for introducing me to the device, zeppelin. Could you please send me the datasheet or detailed spec information?

  • 0 in reply to yongjoon choi
    TI__Expert 8555 points

    Hi Yongjoon,

    yongjoon choi said:
    1. As far as I know, the maximum external frequency of LP5891Q1 is 50MHz. Is stable communication possible up to 1 meter?

    No, it can't. even for SPI, it is not possible to achieve that. why you need to communication such long distance between the controller and LED Driver?

    yongjoon choi said:
    2. Is it possible to transmit a 60FPS video using TMS320F2800x under the following conditions?
    - cascading device number : 4 (LP5891Q1)
    - Line number : 64 lines

    No, the TMS320F2800X just support 10Mhz CCSI. but zeppelin which converts standard SPI to CCSI can support up to 20Mhz SPI/CCSI. otherwise we suggest to use FPGA to generate higher rate interface.

    yongjoon choi said:
    3.Thank you for introducing me to the device, zeppelin. Could you please send me the datasheet or detailed spec information?

    please contact me with email since this device is unpublic now.

    by the way, could you share the schedule of your project?

    BR

    Monet Xu