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LPC51U68 RTC backup

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LPC51U68 RTC backup

‎08-26-2020 07:47 AM
1,085 Views
br1
Contributor I

LPC51U68 has RTC but DON'T have battery backup pin (something like VBAT) ? How is it possible to backup the RTC?

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‎09-01-2020 09:56 AM
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FelipeGarcia
NXP Employee
NXP Employee

Hi,

As you mentioned the LPC51U68 does not have a straightforward method to backup the RTC. The RTC module and the oscillator that drives it, run directly from device power pins. This means you will need to use some external circuitry such as a schottky diode.

Best regards,

Felipe

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