RTC implementation in LS2088A

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RTC implementation in LS2088A

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prashantsoni
Contributor I

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 

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r8070z
NXP TechSupport
NXP TechSupport


Have a great day,

Please see 

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

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109 Views
prashantsoni
Contributor I

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.

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109 Views
r8070z
NXP TechSupport
NXP TechSupport

>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.

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prashantsoni
Contributor I

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.

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r8070z
NXP TechSupport
NXP TechSupport

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 )

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