Other Parts Discussed in Thread: BQ40Z50, BQSTUDIO
Hello,
I find a strange behavior during testing.
From BQ Studio, I send the command Shutdown. After some time, the device goes in shutdown and I have no comm.
If I put the charger voltage to wake up the BQ40Z50, it wakes up and I can resume communication with BQ Sutdio.
However, if I do the exact same thing, same device, but the temperature is in the range of 7 to 9° Celsius to BMON goes in ROM mode at wake-up !!
If i send command 0x08 (exit ROM mode), after all is working fine. Configuration is there and all is working as it should.
To be more precise, I use BQ40Z50R2, FW 2.11. I was able to have the issues with the only changes made to config :
1. 3 cells to 4 cells confg / 2. Rsense from 1mR to 3mR / 3. Charger present voltage from 3000mV to 12000mV
Except this, this is the stock/default config.
Can someone help me to understand what is going on ? Thanks !
Below some temperatures, commands (including to one that answer 9002 - ROM Mode) and the config