TCAN4550-Q1: Reset Time by RST

Wayne Liu

Part Number: TCAN4550-Q1

Hi,

In Figure 21, it states RST pin: Set high to reset device, once finished set back low. I know the minimum high time is 10us, what's the reset time needed after RST low rises to high? Maximum 10us? Thanks.

over 6 years ago

0 Eric Hackett over 6 years ago

TI__Guru 74322 points

Wayne,

The RST pin must be held pulsed high for a minimum of 30us for the reset to properly trigger. Please let me know if you have any questions or concerns.

Regards,

0 Wayne Liu over 6 years ago in reply to Eric Hackett

TI__Expert 8705 points

Eric,
Thanks for your quick response.
I saw the number is 10us min in datasheet RST INPUT TERMINAL table, Width of the input pulse to be considered a valid, am I wrong?
And I have one question as listed, the number 10us or 30us is to trigger the reset command, how long it takes from RST low rises to high to reset finish? Thanks.

0 Eric Hackett over 6 years ago in reply to Wayne Liu

TI__Guru 74322 points

Wayne,

Can you show me in the datasheet where you're seeing the 10us requirement? In the datasheet I'm referencing, the parameter tpulse_width is what defines the minimum time the reset pin needs to be held to assert a device reset. The RST pin is low by default, then a pulse high of minimum 30us to trigger the device reset.

Regards,

0 Eric Hackett over 6 years ago in reply to Eric Hackett

TI__Guru 74322 points

Wayne,

Since this was handled offline, I'll close this thread.

Regards,

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TCAN4550-Q1: Reset Time by RST