iMX8MQ RTC supply

ani10c89 — Thu, 22 Aug 2019 16:10:26 GMT

Hi,

For RTC back-up supply, so we need to provide both VDD_SNVS and NVCC_SNVS through external coin cell or supercap if RTC timings need to be stored?

Please confirm.

Regards,

Anirudha

Re: iMX8MQ RTC supply

Yuri — Fri, 23 Aug 2019 03:58:56 GMT

Hello,

You are right.

According to section 3.1.6 (Power modes) of i.MX 8M Data Sheet for Consumer Products,

Rev. 1.1, 07/2019 :

SNVS Mode: This mode is also called RTC mode. Only the power for the SNVS domain remains
on to keep RTC and SNVS logic alive.

Table 10 (Chip power in different LP mode) states about VDD_SNVS and NVCC_SNVS

supply voltages for this mode.

https://www.nxp.com/docs/en/data-sheet/IMX8MDQLQCEC.pdf

Have a great day,
Yuri

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iMX8MQ RTC supply

Re: iMX8MQ RTC supply