BQ40Z80: BQ40Z80

kanglonglong

Prodigy 60 points

Part Number: BQ40Z80
Other Parts Discussed in Thread: BQSTUDIO, EV2400

Hello, in the process of the whole machine simulation, as long as the battery starts to discharge, suddenly the battery enters a strange mode. Is it communication interference or other reasons for this phenomenon? The screenshot of the battery is shown in the figure below.

over 1 year ago

0 Wyatt Keller over 1 year ago

TI__Guru** 102415 points

Hello,

It does look like something is causing communication issues. Make sure there are no other hosts broadcasting on the communication lines with the EV2400 connected, also check the EV2400 connection is in the SMB port. The gauge could also be in ROM mode which will cause strange communication in BQStudio. You can exit ROM mode by sending command 08 in the advanced communication tab.

Sincerely,

Wyatt Keller

0 kanglonglong over 1 year ago

Prodigy 60 points

Hello，

Thank you for your reply, what are the reasons for entering this mode? Since our chip is encrypted, there is no way to send a command to exit the ROM. Is there any way to solve it?

0 Wyatt Keller over 1 year ago in reply to kanglonglong

TI__Guru** 102415 points

Hello,

If the gauge is sealed it should not enter ROM mode, that is correct. That means it may be one of the other items I mentioned.

Also what cell count are you configured for?

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ40Z80: BQ40Z80