section 7 - Index of

3. Evaluate the "ap" term using Table A-14.According to Table A-14, the term "ap" depends upon where the referenced P memorylocation is located in the DSP56K memory space. External memory accesses requireadditional oscillator clock cycles according to the number of wait states programmed intothe DSP56K bus control register (BCR). Thus, assuming that the 16-bit bus control registercontains the value $0012, external P memory accesses require wp=1 wait state oradditional oscillator clock cycles. For this example, the P memory reference is assumedto be an Internal reference. This means that the return address ($0100) pulled from thesystem stack by the RTI instruction is in internal P memory. Thus, according to Table A-14, the RTI instruction will use the value ap=O additional oscillator clock cycles.4. Compute final results.Thus, based upon the assumptions given for Table A-6 and those listed in the problemstatement for Example 3, the instructionRTIwill requireand will execute ininstruction program word(4+rx)= (4+(2 * ap»= (4+(2 * 0»4 oscillator clock cycles-