PC (Program Counter) The PC register (address 02h) contains the lower eight bits of the 11-bit or 12-bit program counter. The program counter is a pointer register that points to the current instruction being executed in the 2,048-word or 4,096-word program memory. During regular program execution, the program counter is incremented automatically once per instruction cycle. This regular sequence is altered in order to perform skips, jumps, and subroutine calls in the application program.
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