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Part Number: BQ78350
I am using a BQ78350 with a BQ769300. When using the EVM I was able to communicate successfully with BQSTUDIO, however when I used my PCB, I wasn't able to communicate with the BQ78350. I tried with both EV2400 and EV2300, but both attempts were unsuccessfull. The SMB lines are connected to the BQ78350 only, although I have an internal MCU in the layout, I did not place it to test the BQ78350 communication line alone. I have the feeling that the system is actually working since I can see in the oscilloscope the pulses from the VEN pin. I measured the SMC signal and it looks like this:
Do you have an idea of what could be happening?
Thank you very much!
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This looks strange. If the AFE is successfully communicating with the Gas Gauge you should check the ALERT to see if the device detected a fault and is protecting it self. The BQ could be on sleep state. Just make sure the host connection is successfully perceived.
This might not be the issue but it is worth testing. Also to check correct operation you can enable the Display pin and read the voltages on the leds pins.
In reply to WM5295:
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