I'm working with ATmega1280 (Datasheet link) Currently I'm using the internal RC-oscillator at 8MHz
I'm also using Telit LE910 for sending data that can take up to 2A (from the Telit hardware user guide).
You can see my voltage drop in the ignition state of the modem:
My supply voltage is 3.3V from a battery and I have a lot of EEPROM writes, so I want to protect my EEPROM.
I'm facing EEPROM corruption on low battery conditions, therefore my Brown-out level is at 2.5-2.9 (the line corresponding to 101).
My question is if I'm using the CLKPR – Clock Prescale Register
with a division factor of 2 for receiving a 4MHz clock.
Can I switch to Brown-out level corresponding to 4MHz 1.7-2.0 (line 110)?
The BOD detection takes place in the reset logic?
So even in 8MHz the BODLEVEL will refer to the clock after the Prescaler(4MHz)?
The safe zone is for the Vcc frequency after the Prescaler?