Can't get Audio Codec to work - 2 boards in

[Scoop]

Hello,

I'm working on a wireless mic setup over BLE.
EFR32 + TSCS25 audio codec that I can't get the handshake with over I2C.
I'm on my second board design and still can't get it to work. 4 Layer board SGGS, I did not split the ground.

I used TS reference design https://temposemi.com/wp-content/uploads/2016/09/tscs25x_ref_sch_091616.pdf
datasheet https://temposemi.com/wp-content/uploads/2022/06/TSCS454xx_DS_v1.5.pdf

My schematic is attached below along with analyzer read. 

System is powered with 2 LDO 1.8V, 3.3V and 1 Switching reg 1.8V. All pins got power, clean signal this is driving me crazy 
Does this have to do with clock pin on audio codec left unconnected? That's only for master mode right?

Any suggestion is appreciated!   

[MarkS]

Stupid question, but do you have the required pull ups on the I2C lines?

[Scoop]

Stupid question, but do you have the required pull ups on the I2C lines?

Yes I started with 2.2k, then tried 1k,4.7k, 10k

[moffy]

Try slowing down the I2C clock rate and see if that works.