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BQ76942: SPI communication issue on custom PCB. Tested using EV2400

Part Number: BQ76942
Other Parts Discussed in Thread: EV2400, BQSTUDIO

Tool/software:

Hi,

I am having significant issues program the BQ7694204PFBR chip, this is the SPI variant with CRC inbuilt, on my custom PCB. I recently bought the EV2400 as I had the feeling it was my lack of programing skills but my issues remain. May you have a look?

3v3 out from Reg1 is working.

With the logic annalyser using my own code, the best result I recieved from MISO was 0x00.

Using eval board EV2400

EV2400 was updated as of 24/05/2025. When using the BQstudio It is not automaticaly registering the chip and if I manual select the BQ chip, still no success, error message recieved is " No aknoledgment from device". This testing was with both "pack -" and "GND" as I wondered if the issue stemmed from the two ground positions.

Connections were made through port 5 on the eval kit according to this other thread

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1027965/bq76942-evm2400-with-spi-bus

Thanks in advance,

Tomás