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TLIN1431-Q1: TLIN1431-Q1 in Standby Mode

Hongjun Huang
Prodigy 20 points
Part Number: TLIN1431-Q1

In TLIN1431-Q1 Standby Mode:VCC: on nRST: high,I want to confirm we LIN bus on. 

 Can LIN  BUS WAKEUP by PIN “RXD”?we need RXD give a  Falling edge triggered to MCU in Standby Mode. 

  • 0
    TI__Mastermind 26806 points

    Hongjun,

    When the TLIN1431-Q1 experiences a wake-up event in Sleep mode, it will transition through Restart mode and into Standby mode.

    In the TLIN1431-Q1 data sheet, Figure 7-6 "Wakeup through LIN' is likely the best diagram to help illustrate your question. RXD is floating in Sleep mode, but will be pulled low after the wake event. nRST will remain low until Standby mode is entered following tRSTN_act.

    Best,

    Danny

  • 0 in reply to Danny Bacic
    Prodigy 20 points

    hello Danny：

    Thanks for your reply

    I want to confirm when TLIN1431-Q1 work in standby mode,TLIN1431_Q1 receive LIN BUS signal in PIN LIN（PIN NO.15)

    How PIN RXD（PIN NO.13 )work ？CAN PIN RXD give an edge triggered to MCU?

  • 0 in reply to Hongjun Huang
    TI__Mastermind 26806 points

    Hongjun,

    When the device enters Standby mode due to a wake event from Sleep mode, the RXD pin will be latched low. It will not reflect the information on the LIN bus other than to indicate that a wake event occurred. Once the MCU transitions the device to Normal mode, the RXD pin will begin to reflect what is on the LIN pin.

    The answer to your question depends on how RXD is handled in your system. If there is an external pull-up to some power supply, then there could be a falling edge on RXD, but in many systems, the RXD pin is sampled by the MCU once powered on to indicate that a wake-up event has occurred.

    Best,

    Danny