AM625: WKUP I2C0 issue

Hello Biao, 

Thank you for the query.

Please suggest customer to DNI R2344 ( and R2343) and do a quick check.

I suspect both the I2C interfaces are configured as master since the I2C is connected to MCU.

The MCU needs to be configured to slave.

Regards,

Sreenivasa

Hi Sreenivasa,

I have let them try this but it is no use.

BR,

Biao 

Hello Biao, 

Please elaborate what customer changed and tested.

1. Did customer remove the series resistor and check?

Regards,

Sreenivasa

Hello Biao, 

Please confirm if the below cap is also a DNI

C6125 50V/10n

Regards,

Sreenivasa

Hello Biao, 

The WKUP I2C connects to MCU and the EEPROM.

R2429 is 100R near EEPROM 

Customer can try making this resistor also as DNI.

Regards,

Sreenivasa

Hi Sreenivasa,

Thanks for support, I will let customer try and then feedback to you.

BR,

Biao 

Hi Sreenivasa,

we find the root cause, the cap is too big(10nf), customer change it to pf, the waveform is normal now. Thanks for support.

BR,

Biao