[C5535] Confirm the handling WAKEUP pin if not use RTC-only moe

Kaka

Hi TI Experts,

Please let me confirm the following question.

[Question]
Would you please show me the way to handle/treat the WAKEUP pin if customer will not use the RTC-only mode?
I checked the following wiki site, but I could not find the description about this.

Best regards.

Kaka

over 8 years ago

0 Vasantha K over 8 years ago

TI__Genius 12575 points

Hi Kaka-san,

This pin defaults to an input at CVDDRTC power-up. If this is pin not used then its recommended to pull down with 10K resistor.

Regards

Vasanth

0 Kaka over 8 years ago in reply to Vasantha K

Guru 24520 points

Hi Vasanth,

Thank you for your comments.
In order to reduce the power consumption, I will recommend to my customer to use the pull down resistor.
Best regards.
Kaka

0 Kaka over 8 years ago in reply to Kaka

Guru 24520 points

Hi Vasanth,

I got additional questions from my customer. Please let me confirm this.
[Question]
Customer think that the WAKEUP pin can be configured as OUTPUT.
So, there is no problem to handle this pin as OPEN if set it as OUTPUT pin.
How do you think? If you have any concerns, please let me know.

Best regards.
Kaka

0 Vasantha K over 8 years ago in reply to Kaka

TI__Genius 12575 points

Hi Kaka-san,

Yes, there is no problem to handle this pin as OPEN if it is set as OUTPUT pin.

The reason for recommending to pulldown with 10K resistor is to avoid initial leakage current until pin gets configured as output and also RTC only mode was not used.

Hope this clarifies.

Regards

Vasanth

0 Kaka over 8 years ago in reply to Vasantha K

Guru 24520 points

Hi Vasanth,

Thank you for your supports.
My concern is cleared.

Best regards.
Kaka

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[C5535] Confirm the handling WAKEUP pin if not use RTC-only moe