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DLP9000X: DLPC900 AND DLP9000X

Linxin
Prodigy 125 points
Part Number: DLP9000X
Other Parts Discussed in Thread: DLPC910

Hi, i have a problem when using   FPGA + DLPC910 + DLP9000X,

    that is   reset  DLPC910 ,   after INIT_ACTIVE returns to low, 

    read the DLPC910 registers using I2C port,   0x0004   always returns a value  0x4, 
   the interrupt register is enabled and the interrupt can not be cleared,

   this register bit show power  fault,but i am sure  the power supply is ok, so  i have no ieda, what's wrong?
    

  • 0
    TI__Mastermind 43165 points
    Hello Linxin,

    Please be sure the power supply has enough current capacity so that it does not droop during the initialization. Also make sure that the bulk capacitors near the DLPC910 (or the µ-controller you are using as your input) are sufficient. It can appear to be fine, but if it droops even for a very short period you can get unexpected results.

    Fizix