LP8557IEVM: LP8557IEVM I2C Problem

Hello Sir,

I bought a set of LP8557IEVM, and when I received it, I started to test it. I2C could not communicate.

I checked the I2C circuit of the board and found that the I2C signal pins were all connected to the ground.

Then, I checked the LP8557I(U1) Chip mark and printed "39RN P40", is this correct?

The Sales Order No. T01039025

Customer PO Item No. LP8557IEVM

Thanks,

David Lin