rcall,   rjmp,

Program execution continues at address PC + k + 1. The relative address k is from -2048 to 2047.

rcall, ( k12 --)

Relative Call to Subroutine

Relative call to an address within PC - 2K + 1 and PC + 2K (words). The return address (the instruction after the RCALL) is stored onto the Stack. See also CALL. For AVR microcontrollers with Program memory not exceeding 4K words (8KB) this instruction can address the entire memory from every address location. The Stack Pointer uses a post-decrement scheme during RCALL.

rcall ( k12 -- )

Relative jump to an address within PC - 2K +1 and PC + 2K (words).