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OPT3002: Disabling the low Interrupt threshold

PC
Prodigy 10 points
Part Number: OPT3002

When using the OPT3002 in transparent hysteresis-style mode I want to disable the low threshold interrupt such that I only get an interrupt when there is enough light to exceed the high threshold limit.

The DS states that the interrupt will be fired when the threshold 'is lower than the light level of interest. ie less than (<) and not less than or equal (<=)

To me that means that if I set the lower threshold to be 0x0000 then the lower interrupt will never fire?

Does the silicon guarantee this or could I still get interrupts when the light power reading reaches 0x0000.

Regards

  • 0
    TI__Expert 6800 points

    Hi,

    The low-threshold interrupt should never fire if the low threshold is set to 0.

    Thank you,

    Brent Elliott

  • 0 in reply to Brent Elliott
    Prodigy 10 points

    Apologies for being pedantic, but you used the word 'should'.......

    Does the silicon guarantee that it will not fire if the threshold is set to 0x0000.

    Best Regards

  • +1 in reply to PC
    TI__Expert 6800 points

    Hi,

    No problem. The silicon will not fire if the threshold is 0x0000. The value would need to be less than, not less than or equal. Also, in transparent hysteresis mode, the interrupt is set when the value is higher than threshold high, and the interrupt will stay set until the value drops below threshold low. Just wanted to clarify since you asked if the interrupt would fire if the light level was below the threshold low.

    Thank you,

    Brent Elliott