The Program Counter is loaded with the return address (22 bit wide) read from the stack, and the Stack Pointer is incremented by 3. <li> RETI <br>
20
The same as RET, but in addition sets the general interrupt flag (flag I in the Status Register). </ul>
21
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22
Returns are the slowest instructions in the pAVR implementation of the AVR instruction set. They take 9 clocks. <br>
23
First 2 clocks are spent while waiting the previous instructions to write the Unified Memory. Next 5 clocks, the Program Counter is read from the Unified Memory. In a future version, this part might take only 4 clocks. Finally, another 2 clocks are spent while bringing the target instruction into the instruction register. <br>
