INA4235: Deciphering the Alert Pin

Hi Johny,

johny radio said:

Can Alert pin monitor Under-Voltage and Over-Current at the same time?

Yes, you can only monitor up to 4 alerts at a time.

johny radio said:

Can Alert pin monitor different conditions on each channel, such as UV and OC on Channel 1 and OV and OC on Channel 2?

Yes you can, please see Section 7 for details on how to do this.

johny radio said:

Will any condition from any channel raise the same Alert pin?

Any alert configuration set will trip the same alert pin. You'll have to read the FLAG register to find out which alert tripped.

johny radio said:

• How can i know which channel triggered the alert? Is it flags ENERGYOF_CH..., 1 to 4?
• How can i know which condition fired the alert? Is it flags LIMIT..._ALERT, 1 to 4?

 The FLAG register can be used to find this out.

johny radio said:

Querying the Flags will require some I2C clock cycles, correct?

Yes, that's right.

johny radio said:

Is it possible to hard-wire the flags to certain pins, so that the channel or condition is instantly provided, instead of requiring the I2C master to query the device?

No, the ALERT pin is the only accessible output.

Best,
Mallika Senthil