Purpose: Flash, SRAM, EEPROM, and data-space geometry.

Namespace: atmega328p::memory

Resource	Capacity
Flash	32,768 bytes
SRAM	2,048 bytes
EEPROM	1,024 bytes

The header also provides page sizes, page counts, address ranges, and minimum erase/write cycle specifications.

#include <atmega328p/Memory.h>
 
namespace mcu = atmega328p;
 
static_assert(mcu::memory::flash_size_bytes == 32768UL, "Flash");
static_assert(mcu::memory::sram_size_bytes == 2048UL, "SRAM");
static_assert(mcu::memory::eeprom_size_bytes == 1024UL, "EEPROM");
static_assert(mcu::memory::ramend == 0x08FF, "SRAM end");

The data-space size includes the register and I/O regions; it is not additional SRAM.