RTC howto on imx233-olinuxino-micro

[ggilles]

Hi,
I would like the RTC to be preserved when the power supply is removed on the imx233-olinuxino-micro.

Ideally, a coin cell would be used to power the internal RTC of the imx233, and the board would switch off when there is no external power supply.

However, I have a hard time figuring out how to achieve this. According to this comment in freescale's community forum, the RTC is only designed for battery powered application (the comment applies to the imx25, but imx233 works the same).

Is there any chance to use the builtin RTC with a coin cell or do I have to use an external i2c RTC instead?

-- Gilles

[Kean]

Gilles,

If you want to use a coin cell, you'll need an external I2C RTC.
The imx internal RTC is designed to run when powered via the Lithium Ion battery input.

Kean

[ggilles]

Ok, thank you for the quick answer.