0x20000000

0x20000000 is a hexadecimal constant representing the unsigned 32-bit value 536,870,912. In decimal form it is 536,870,912, and in binary it corresponds to a single set bit at position 29 (zero-based), i.e., 2^29. Because it is a power of two, 0x20000000 is commonly used as a bit mask or flag in low-level programming, where it can test or set the 30th bit of a 32-bit register.

In memory layouts for embedded systems, 0x20000000 is widely encountered as the start address of SRAM in ARM Cortex-M microcontrollers. Many device memory maps designate 0x20000000 as the base address for RAM, with the actual usable size depending on the specific MCU. As a result, software examples and startup code frequently reference this address when configuring memory regions or declaring runtime data structures.

In source code, 0x20000000 is written as a hexadecimal literal, commonly with an unsigned suffix in languages such as C or C++ (for example, 0x20000000 or 0x20000000u). It may appear in expressions that perform address calculations, memory-mapped I/O, or bitwise operations.

Overall, 0x20000000 is notable primarily as a large, power-of-two hexadecimal value that appears prominently in low-level programming and embedded system memory maps.