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BQ32002: Is the IRQ pin necessary for operation?

Mitchell Spears
Prodigy 575 points
Part Number: BQ32002

Hi CTS Apps, 

I am curious if the BQ3200x can be used without the IRQ pin functionality. My customer is just looking for a basic RTC and I do not know if the Processor will have enough IOs to accommodate the IRQ. Can we go without it? 

If so how should it be terminated? 

Thanks, 

Mitchell

  • +1
    TI__Mastermind 30270 points

    Mitchell,

    IRQ is an output, and this function is not required. You can configure the FT and FTF muxes so that the IRQ pin stays at a constant state, see Figure 3 and Table 1 in the datasheet. I recommend configuring IRQ to reflect the state of OUT, setting OUT to 1, and terminating IRQ to VCC through 4.7kΩ.

    Regards,

    Derek Payne