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Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A20 => Topic started by: Shelniraj on March 22, 2022, 01:54:03 PM

Title: A20 I2C
Post by: Shelniraj on March 22, 2022, 01:54:03 PM
Dear All,

We are using A20 lime, and want to connect RTC PCB through I2C pins. Where those can be located on schematic or GPIO? Do you have  any driver library for the same?

Regards
Shelniraj
Title: Re: A20 I2C
Post by: LubOlimex on March 22, 2022, 04:14:04 PM
You can find them on the LCD connector. You can find hardware files here:

https://github.com/OLIMEX/OLINUXINO/tree/master/HARDWARE/A20-OLinuXino-LIME
Title: Re: A20 I2C
Post by: Shelniraj on March 23, 2022, 10:26:32 AM
Dear Lub,

Thanks I got it.
My next question is SDA and SCL port requires pull up resistors on board, are those placed on
board? Where can I locate those?

Regards
Shelniraj
Title: Re: A20 I2C
Post by: LubOlimex on August 16, 2022, 11:54:23 AM
They are not placed, if you decide to use pins as I2C you need to take care of that. However, such pull ups can be present in the equipment that you attach to A20-OLinuXino-LIME, only one side needs pull ups, so make sure you don't overdo it.
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