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DRV8825: Reset input condition

K. Suzuki
Prodigy 115 points
Part Number: DRV8825

Hi,

 

1). What is the allowable reset rise time ?
2). Is the reset input a Schmitt trigger ?

 

In my circuit, 0.1uF is connected and it is a slow input.

 

  • 0
    TI__Guru 56650 points

    Suzuki-san,

    nRESET is a logic-level input. For the spec, I cannot say it is a Schmitt trigger. But, it has 0.45V input hysteresis to prevent noise.

    The logic high and logic low flips when the nRESET pin voltage moves between 0.7V and 2.2V. It doesn't request any certain rising time on nRESET pin. After RESET, I will give at least twake time to start driving the motor.

  • 0 in reply to Wang5577
    Prodigy 115 points

    Dear Wang Li.

    Thank you for a quick reply.

    I'm sorry, but I will check the content and reply again.