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SH7713 データシート(PDF) 77 Page - Renesas Technology Corp |
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SH7713 データシート(HTML) 77 Page - Renesas Technology Corp |
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77 / 904 page  Section 2 CPU Rev.1.50 Aug. 30, 2006 Page 37 of 860 REJ09B0288-0150 2.3.3 Program Counter The program counter (PC) stores the value obtained by adding 4 to the current instruction address. There is no instruction to read the PC directly. Before an exception handling state is entered, the PC is saved in the save program counter (SPC). Before a subroutine call is executed, the PC is saved in the procedure register (PR). In addition, the PC can be used for PC relative addressing mode. Figure 2.5 shows the system register and program counter configurations. MACH MACL 31 0 PR 31 0 PC 31 0 Multiply and accumulate high and low registers (MACH/MACL) Procedure register (PR) Program counter (PC) Figure 2.5 System Registers and Program Counter |
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