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Original question:

BQ41Z50: How do you utilize the GPIO 1/2/3 pins?

BQ41Z50: How do you configure the ALERT* pin (how do you configure interrupts)?

Kevin Banks
Prodigy 235 points
Part Number: BQ41Z50

Tool/software:

Searching the BQ41Z50 Technical Reference Manual for the words "ALERT" and "INTERRUPT", I don't see how you configure/use the ALERT* pin (pin 5).

How do you configure which conditions will/will not drive this pin low?

How would you clear an interrupt condition if you did get one?

  • 0
    TI__Mastermind 27321 points

    Hello,
    We are looking into this. I will get back to you. 

  • +1 in reply to Jose Couso
    TI__Mastermind 27321 points

    Hello,

    Pin 5 is defined as ALERT pin by default. If any ALERT occurs under the Safety Alert register, it should set. And it should clear when Alert Clears. This should be all handled by firmware. 

    Alert pin is configured as push_pull pin and ACTIVE_HI by default. 

    Kevin Banks said:
    How do you configure which conditions will/will not drive this pin low?

    When protections are enabled, it should trigger Alert for each protection by default. For instance, assuming CUV event occurs, the device will trigger an Alert when cell voltage is less than the defined CUV threshold. At this point, the ALERT pin should go hi. It should clear when Safety Alert clears.