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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SH7265 датащи(PDF) 86 Page - Renesas Technology Corp |
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SH7265 датащи(HTML) 86 Page - Renesas Technology Corp |
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86 / 2024 page  Section 2 CPU Rev. 1.00 Mar. 14, 2008 Page 50 of 1984 REJ09B0351-0100 2.1.3 System Registers The system registers consist of four 32-bit registers: the high and low multiply and accumulate registers (MACH and MACL), the procedure register (PR), and the program counter (PC). MACH and MACL store the results of multiply or multiply and accumulate operations. PR stores the return address from a subroutine procedure. PC indicates the four bytes ahead of the current instruction being executed. 31 0 31 0 31 PC PR MACL MACH Multiply and accumulate register high (MACH) and multiply and accumulate register low (MACL): Store the results of multiply or multiply and accumulate operations. Procedure register (PR): Stores the return address from a subroutine procedure. Program counter (PC): Indicates the four bytes ahead of the current instruction. 0 Figure 2.3 System Registers (1) Multiply and Accumulate Register High (MACH) and Multiply and Accumulate Register Low (MACL) MACH and MACL are used as the addition value in a MAC instruction, and store the result of a MAC or MUL instruction. (2) Procedure Register (PR) PR stores the return address of a subroutine call using a BSR, BSRF, or JSR instruction, and is referenced by a subroutine return instruction (RTS). (3) Program Counter (PC) PC indicates the four bytes ahead of the current instruction being executed. |
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