Layerscape中的主题 RTC implementation in LS2088A

RTC implementation in LS2088A

prashantsoni — Wed, 27 Feb 2019 07:04:30 GMT

Hi NXP team,

For LS2088A, How to do the RTC- Battery Backed design implementation.

What are voltages required by the internal RTC module when we are working with standby(battery) voltage.

#ls2088A‌ #rtc

Re: RTC implementation in LS2088A

r8070z — Thu, 28 Feb 2019 11:44:38 GMT

Have a great day,

Please see

https://community.nxp.com/thread/496429

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Re: RTC implementation in LS2088A

prashantsoni — Fri, 01 Mar 2019 06:15:25 GMT

Hi Serguie,

Still that is not providing any solution for the issue.

We want to use a battery , and the RTC_CLK is on OVDD level , so we need to provide the OVDD voltage to processor also for operate rtc in battery backup mode.

Re: RTC implementation in LS2088A

r8070z — Tue, 05 Mar 2019 04:35:35 GMT

>For LS2088A, How to do the RTC- Battery Backed design implementation.

>What are voltages required by the internal RTC module when we are working with standby(battery) voltage.

I think it is related to the battery backed RTC which as you can see has been de-featured.

> We want to use a battery , and the RTC_CLK is on OVDD level

Please describe more clearly what do you want. I am not sure what do you mean as RTC_CLK. The LS2088A reference manual (rev.0) and datasheet (rev.1) do not mention RTC_CLK.

Re: RTC implementation in LS2088A

prashantsoni — Wed, 06 Mar 2019 07:29:23 GMT

Hi Serguei,

We want to implement RTC in backup mode. If LS2088 board power is off , still with standby power ie a coin cell we want to run RTC. This we want to implement, so any suggestion for this.

Re: RTC implementation in LS2088A

r8070z — Tue, 12 Mar 2019 14:02:20 GMT

I think you can use external RTC chip with I2C interface. For example the LS2088ARDB board has DS3232 as external RTC (https://datasheets.maximintegrated.com/en/ds/DS3232.pdf )