Problem with I2C in low power Run mode

[Embionics]

Hello

I am using kl25Z128 freedom board.

I have configured the controller for 2 configuration as

configuration 0 : PEE (With external crystal) 48Mhz core clock

Configuration 1 : BLPI (With internal crystal) 4Mhz

I want to use the I2C in both the configuration.

But when i am selecting internal frequency for I2C with both configuration enable.

It is not showing any values to select as there are no common frequencies in both configuration.

For this i made the changes in the CPU clock setting i changed the bus clock and core clock but i am getting the same result.

I have face the same problem with timer.

Is it possible to operate the I2C with BLPI mode?

If yes what changes i need to do in CPU setting?

Is is possible for SPI also?

-Amreen

[vicentegomez]

Hi,

Regarding to your first question it is possible to use the I2C module with BLPI mode at 4 Mhz Core Clock, in this case the CPU configuration are as simple as with the PEE mode.

In the other hand if you enable the PEE mode and the BLPI mode you will need to set a Frequency for the I2C module that can be reachable with both modes (BLPI and PEE) in order to use the I2C within this two configurations. This could be possible reducing the PEE core clock value.

I hope this information can help you.

Regards