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TLIN1028-Q1: Wake up sequence from sleep/Power OFF to Normal for TLIN10283-Q1

Shinji Tsuji
Genius 14139 points
Part Number: TLIN1028-Q1
Other Parts Discussed in Thread: TLIN10283-Q1

Hi team,

1. Wake up sequence

Could you share me wave forms of the below signals during mode transition for TLIN10283-Q1?

Mode1 : Power off --> Standby

Mode2 : Sleep --> Standby

SIgnals : Vcc, nRST, Vsup, LIN

2. Wake up procedure from Sleep

If you receive wake signal on LIN bus while in sleep mode, the device should be wake up to Standby state, correct?

In order to make the device to Normal state, do you need to pull EN pin High in Standby state?

In this case, do you normally pull EN to Vcc? or do you pull up control EN pin by MCU which is powered by Vcc?

  • 0
    TI__Guru 62920 points

    Hello Tsuji-san,

    We are still looking into this - we will get back to you later this week.

    Regards,
    Max

  • 0 in reply to Miguel Robertson
    TI__Guru 62920 points

    Tsuji-san,

    I have attached a presentation containing the relevant mode transition waveforms - I hope it is useful to you.  To answer your other questions, you are correct that a wake-up event detected during sleep mode triggers a transition to standby mode.  A further transition to normal mode requires that the EN input be high.  The most common approach is to allow an MCU to control EN.  (If EN were tied only to VCC it would be difficult for the MCU to later control a transition into sleep mode.)

    Please let us know if you have any further questions.

    Regards,
    MaxTLIN1028 State Transition Waveforms.pptx

  • 0 in reply to Miguel Robertson
    TI__Genius 14139 points

    Hi Max,

    Could you please add 1 slide to show "Sleep to Standby transition with Vcc/nRST"?

    regards,

  • 0 in reply to Shinji Tsuji
    TI__Guru 74262 points

    Tsuji-san,

    I wasn't able to find waveforms including both VCC and nRST. However, on slide 7 of the presentation Maxwell shared VCC is shown during a transition to Sleep then a wake-up event. In this case, VCC is falling (the decay rate based on capacitance and load on the LDO) as the device transitions into sleep mode. nRST will follow VCC until the falling under voltage threshold is reached (4.45V for the 5V LDO, 2.75V for the 3.3V LDO), then nRST signal will fall to a logic low immediately while VCC continues to decay at the same rate.

    Once the wake event happens to transition from sleep to standby, VCC begins to ramp up. nRST stays at a logic low until the VCC under voltage rising threshold is reached (4.7V for the 5V LDO, 2.9V for the 3.3V LDO) where it will immediately ramp to the voltage level of VCC and begin to ramp with VCC until the final voltage is reached.

    Please let me know if you have any questions.

    Regards,