0x4001

0x4001 is a hexadecimal numeric literal commonly used in computing and digital electronics. The 0x prefix indicates hexadecimal notation, and the value 0x4001 corresponds to 16,385 in decimal.

Numerical and bit properties: In binary, 0x4001 is 0100 0000 0000 0001. This means the value has bits 14 and 0 set. As a 16-bit quantity, it is just above 0x4000 and can be used as a small offset, a bit mask, or a register identifier depending on context. When written in 32-bit or wider addresses, 0x4001 may be part of a larger address rather than a standalone pointer.

Usage in computing: 0x4001 is commonly seen as a literal in programming and hardware documentation. In many architectures, memory-mapped I/O registers or peripheral bases are organized with a base address such as 0x4000 0000; 0x4001 can appear as a specific register offset or as an example value in code. In software, it may be defined as a constant to represent a hardware register, a configuration bit pattern, or a small address offset in simulations, test code, or documentation. Its exact meaning is highly architecture- and context-dependent.

Endianness note: when stored in memory as a 16-bit value, little-endian systems represent 0x4001 as the bytes 01 40; big-endian systems represent them as 40 01.

See also: 0x4000, 0x4002. The interpretation of 0x4001 varies by platform, and there is no universal standard assignment for this value.