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INTB control during sleep mode

user4329513
Prodigy 20 points
Other Parts Discussed in Thread: LDC1312

Hey,

On the project i'm currently working on I am interested in controlling the state of the INTB pin even when the LDC is in sleep mode.

My intention is to switch another "stupid" sensor ON and OFF over I2C, using the LDC1312 as a communicator between I2C and its INTB pin. Having the LDC powered on all the time is not an option due to power limitations. 

Moreover, is there a way of not de-asserting INTB when enabling sleep mode on the LDC1312

Best regards, 

Karl

  • 0
    TI__Genius 13650 points
    Hello Karl,
    I'm afraid that putting the LDC1312 into sleep mode will always clear the INTB.
  • 0 in reply to Ben Kasemsadeh
    Prodigy 20 points

    Ben Kasemsadeh said:
    Hello Karl,
    I'm afraid that putting the LDC1312into sleep mode will always clear the INTB.

    Hi Ben,
    Thanks for the fast reply. So if clearing INTB is inevitable while entering sleep mode, is it still possible to toggle INTB while in sleep mode or is the interrupt pin only intended to respond to conversion results (like data ready, under/over range etc)? Since I2C communication is still active during sleep mode, I hope to be able to use this interrupt pin as a digital I2C controlled switch even though the LDC1312 isn't awake. Is this possible in some way or another? 

  • 0 in reply to user4329513
    TI__Genius 13650 points

    Hi Karl,
    INTB can be used for any sensor related warnings or for DRDY. Since the sensor is inactive during sleep mode and no conversions take place, there is no function available during sleep mode that can be routed to INTB. 

    On the LDC1312 in sleep mode, there is unfortunately no I2C command that will toggle the output on INTB as it is often the case on GPIO pins.