Purpose: Low, high, and extended fuse bit locations.

Namespace: atmega2560::fuse.

Fuse locations are bit positions. Fuse bytes are active-low: programmed bits are zero. Do not infer fuse bytes for a board from these constants alone.

#include <atmega2560/Fuse.h>
 
namespace mcu = atmega2560;
 
static_assert(mcu::fuse::high::JTAGEN == 6, "ATmega2560 Fuse definition");

Safety

Fuse bit constants are positions; they are not complete fuse byte presets. Fuse byte values depend on the selected bootloader size, JTAG state, system clock, and brown-out configuration. Choose them for the target board before programming.

Microchip identifies bit value 0 as programmed and 1 as unprogrammed.

These are hardware definitions, not runtime register access or initialization.

Source: ATmega2560 datasheet (DS40002211A).