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TLC5955: LAT pulse problems.

russ hays
Prodigy 10 points
Part Number: TLC5955

Using Logic analyzer 

Control data write is working great,  GS date write is great.  However, Im  using a second controller to simply provide a clk input to the GSCLK input.   when i do this i have random latch  pulses added to my gs writes corrupting the display.

The GSCLK pulse can run continuously or no?  read the manual 50 times or more.  cant figure   it out .

  • 0
    TI__Genius 12915 points

    Hi Russ,

    To confirmation, you are using one MCU for SIN/SCLK/LAT signal and another MCU to input GSCLK? I am not so clear about your description, could you help to capture some plots for SIN/SCLK/LAT/GSCLK when the random latch pulses happened?

    Yes GSCLK pulse can run continuously. The GS counter would resets to 0000h when the LAT rising signal come.