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LightCrafter v2.0 connector pin assignment

Other Parts Discussed in Thread: DLPC300

Hello,


I have a question reguarding the pin assignment of the connector between the driver and the system bord. Is it the same for version 2.0 as it is in the schematics provided on the web page? I belive the schematics are for version 1. Is that correct?

Kind regards

Martin Nieland

  • Martin,

    The pin assignment did not change for the connector between the driver board and system board. Version 2.0 changes occurred only the system board and are summarized as:

    • Change in the resistor population options to allow interrupts from FPGA to DM365 (R202 removed, R205 added). This is need for extended pattern sequence mode
    • Change in the device used for ESD protection of USB to support USB 2.0 speeds.

    Schematics are up to date with the changes. Version 2.0 includes:

    • Driver Board version 1.0
    • System board version C
    • DMD board version A
  • Hello Pedro,


    thank you for your fast response. I have another question. I want to use the light crafter without the system board, but with my own fpga board instead. The light crafter is booting fine and I am able to projekt test patterns. The only problem is that only the red led seams to be working. I checked the LED enable signals and the PWM signals and they all look ok. I see the same behavior when I power up the driver board without the system board connected to it. Do you have any idea how to solve this?

  • Martin,

    The LightCrafter System board's FPGA drives the LED enable signals. If your FPGA is not driving the LED enable signals, you can have DLPC300 drive the LED enables by:

    • Removing resistors R31, R32, and R33
    • Populating zero ohm resistors in R35, R36, R37

    Also check the signal MSP_LED_ENABLEZ. The MSP430 has a timeout mechanism in its firmware to shutdown LEDs when they are continuously on for a couple seconds to prevent burning off an LED. This signal is used to enable the outputs of the bus transceiver and pass the LED enable signals to the LED driver circuit.

  • Hello Martin,

    You may want to have a look at the Driver board schematics, the I/O lines of DLPC300 C8, A7 and B5 known as TSTPT_5, TSTPT_4 and TSTPT_3 signals, are used for LED_BLU_EN, LED_GRN_EN and LED_RED_EN. 

    The default design is made in such a way that, these signals first enter into the top board i.e., System board FPGA input signals, and then returned back to the driver board as FPGA_LED_BLU_EN, FPGA_LED_GRN_EN, FPGA_LED_RED_EN signals and then processed by the LED driver.

    Now, to operate the board without the top or system board, you can do the following - 

    1. Remove R31, R32, and R33 0-Ohm resistors.

    2. Install R35, R36 and R37 resistors with 0-ohm resistors. 

    Regards,

    Sanjeev

  • Hello Martin,

    Apologies for multiple replies, my colleague already posted, I haven't looked at the same. You may want to use them as applicable.

    Regards,
    Sanjeev

     

  • Thank you so much for the great support!