Print Page - RTC howto on imx233-olinuxino-micro

Title: RTC howto on imx233-olinuxino-micro
Post by: ggilles on July 10, 2013, 05:34:08 PM

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 (https://community.freescale.com/thread/307350#330459), 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

Title: Re: RTC howto on imx233-olinuxino-micro
Post by: Kean on July 10, 2013, 05:50:44 PM

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

Title: Re: RTC howto on imx233-olinuxino-micro
Post by: ggilles on July 10, 2013, 07:08:47 PM

Ok, thank you for the quick answer.

Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => iMX233 => Topic started by: ggilles on July 10, 2013, 05:34:08 PM