• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 34 subscribers
  • Views 324 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

TIC12400-Q1: TIC12400-Q1 review schematic

TIC12400-Q1: about wake up and TRIGGER behavior

Lawrence He
Genius 3020 points
Part Number: TIC12400-Q1
Other Parts Discussed in Thread: TIC12400

Hi, Support Team

Q1:Could share TIC12400-Q1 about "wake up" condition and operation mode?
Q2:in SLEEP mode, if IN0~IN23 change voltage could trigger to normal mode?

if any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence

  • 0
    TI__Mastermind 26736 points

    Lawrence,

    Could you clarify your questions about sleep and normal mode? The TIC12400-Q1 has continuous and polling modes, but does not have sleep/normal modes like some transceivers might. Are you referring to microcontroller or system sleep?

    Best,

    Danny

  • 0
    Prodigy 40 points

    Hi Danny

    Q1：operation mode : polling mod

    Upon receiving the external signal IGN_CON (IN0), the TIC12400 should act as a wake-up source, and it can wake up the MCU through the wake_B pin.

     

    Q2：IN0

  • 0 in reply to Amy Huang
    TI__Mastermind 26800 points

    The TIC12400-Q1 uses the Interrupt (/INT) pin to indicate a state change on any of the enabled Input (INx) pins. 

    The TIC12400-Q1 does not have a "sleep mode" simply a lower power "Polling Mode" that is typically used when the MCU and rest of the board is placed into the low-power "Sleep Mode".  The TIC12400-Q1 always remains powered through the VS pin and monitor the INx pins in a polling cycle. When a state change is detected, the TIC12400-Q1 will pull the /INT pin low to indicate an input has changed state.

    Therefore, to use the TIC12400-Q1's /INT pin for a Wake Up signal to the MCU or board, you will need to connect this pin to both the MCU and power regulator, or whatever device will take this signal and wake up the MCU and board.  Once the MCU has woken up, it should also be able to use the /INT pin for regular interrupt notification without the regulator becoming disabled. 

    One example of how this can be accomplished is shown in section 8.3.9.3 of the TIC12400-Q1 datasheet, but you may need to modify this example to work with your application.

    Simply put, the TIC12400-Q1's /INT pin will function as a normal open-drain Interrupt pin when the MCU is NOT in Sleep Mode.  However, when the MCU is in Sleep Mode, the board will also need to use the interrupt generated on the /INT pin as an indicator to wake up the MCU. 

    Regards,

    Jonathan