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FDC2212: INTB driver type

Akira Youngblood
Prodigy 10 points
Part Number: FDC2212

What is the driver type of the INTB pin on the FDC2x1x FDC sensors? The datasheet only describes it as a configurable output pin. Is it push-pull, open-drain, or something else? Or, to ask the same question a different way, can the INTB pin be tied to an I2C IRQ line shared with other devices or does it require a dedicated GPI on the host controller?

Regards

  • +1
    TI__Mastermind 23045 points

    Hello Akira,

    The driver type for INTB is open drain. INTB is active low, so when it is asserted it pulled low. If your I2C IRQ line can support active low interrupts then you shouldnt have any issues, but it can definitely be used using a dedicated GPI on your MCU if I2C IRQ does not support active low interrupts. Remember interrupts need to be cleared after they are generated there is a list on p. 20 of the data sheet which can be found here.

    Best,

    Isaac