i.mx RT1160 powerup sequence

[Swezin]

In my design R=100k and C=1uF as I have unknown delay time in VDD_HIGH_IN and DCDC_IN and 1ms for DCDC_PSWITCH is not enough. so I increased the RC delay time. What will happen if DCDC_Pswitch delay is larger than 1ms.

[Swezin]

Thank you Kan for your quick reply. Another question,

The reset is not functioning. I measured the voltage, and it drops to zero when I press the switch, but the chip does not reset.

[Kan_Li · Accepted solution]

Hi @Swezin ,

No issue would happen if you extend the delay for DCDC_Pswitch.

Have a great day,
Kan

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[Swezin]

Hi @Kan_Li 

Thanks for your fast response. Another question.

The reset is not functioning. I measured the voltage, and it drops to zero when I press the switch, but the chip does not reset.

[Kan_Li]

Hi @Swezin ,

This might still be related with the delay for DCDC_PSWITCH, you know, if the delay is not enough to bring up the DCDC internally, only a manual reset can not reset the device. Please extend the delay and try again. 

BTW, if the problem is still there, please submit a private ticket with the whole schematics for a review, it is hard to locate the root cause with part of the schematics. To submit a private ticket, please kindly refer to https://www.nxp.com/video/tutorial-for-nxp-support-case-portal:NCP-VIDEO .

Have a great day,
Kan

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Note:
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- We are following threads for 7 weeks after the last post, later replies are ignored
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