MP2667 NACK on first I2C transfer

Hello,

I am using the MP2667 charger/power path chip where the schematic design was made according to the evaluation board. There is one thing that does not seem right:

When first powered on or when exiting shipping mode, the first I2C transfer always fails.

I am aware that there is an immunity timer of 200us when power is first applied, but this issue also happens if I add a delay before writing to the chip. -Is this expected behaviour or am I doing something wrong?

Regards,
Sven Forsberg

Hello sve,

Can you share the initial communication and then the successful one after?