Hello there,
I have a question regarding the proper SMB connection with the BQ40Z50, that at the same time needs to be able to communicate with either the host MCU on board, or the externally connected EV2300 tool. I have drawn this crude schematics to depict my case:
It is based on the eval board, to which I added the master MCU with pull up resistors. My question is:
- Will such config work correctly, meaning, the MCU or the EV tool will be able to communicate with the gauge with no issues (not at the same time, but one at a time, while the other stays connected to the bus)?
- Do the pull up resistors (pulled to the MCU VDD level) need to be disconnected when the EV2300 is connected?
- Should the pull up resistors be connected to the BQ40z50 VDD level instead? But on the other hand, the EV2300 tool does not care.
I would appreciate all feedback!