I'd like to develop an Arduino board with the ATmega32U4 MCU but in a low power mode. I've been searching and I know I have to change the fuses to prevent the brown-out-reset (BOR) when the battery is lower than a certain voltage. I'd also have to change the CLK bits to divide the 16MHz crystal into a lower frequency mode to consume less energy.
I found this webpage to change the fuses.
I just don't know how to do this (which program to use - FLIP?? and how to proceed) and if by doing this bootloader change the board would still be recognized in the Arduino 1.0 program (boards sections - like a Leonardo variant 8MHz for example). I have the 6x2 ISP pins accessible.
By the way, I have a board with the ATmega32U4 and it's 0.1uF capacitors and a 16MHz crystal (+ 2x 22pF caps). I also have the ATMEL mkII programmer with the ISP 3x2 MISO/MOSI/CLK/RESET/VCC/GND connector.
Would somebody know how to help me?