Program counter

Program counter

ˈprəʊgræm ˈkaʊntə
ˈproʊˌgræm ˈkaʊntər
Definition: The program counter (PC), commonly called the instruction pointer (IP) in Intel x86 and Itanium microprocessors, and sometimes called the instruction address register (IAR), the instruction counter, or just part of the instruction sequencer, is a processor register that indicates where a computer is in its program sequence.Usually, the PC is incremented after fetching an instruction, and holds the memory address of ("points to") the next instruction that would be executed.Processors usually fetch instructions sequentially from memory, but control transfer instructions change the sequence by placing a new value in the PC. These include branches (sometimes called jumps), subroutine calls, and returns.
Meaning: Bộ đếm chương trình
How to use "Program counter" vocabulary in sentence (example)

They consist of an arithmetic logic unit and processor registers, a control unit containing an instruction register and program counter, a memory to store both data and instructions, external mass storage, and input and output mechanisms.

View more