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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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SH7052 数据表(PDF) 49 Page - Renesas Technology Corp |
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SH7052 数据表(HTML) 49 Page - Renesas Technology Corp |
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49 / 919 page  23 Section 2 CPU 2.1 Register Configuration The register set consists of sixteen 32-bit general registers, three 32-bit control registers and four 32-bit system registers. 2.1.1 General Registers (Rn) The sixteen 32-bit general registers (Rn) are numbered R0 to R15. General registers are used for data processing and address calculation. R0 is also used as an index register. Several instructions have R0 fixed as their only usable register. R15 is used as the hardware stack pointer (SP). Saving and recovering the status register (SR) and program counter (PC) in exception processing is accomplished by referencing the stack using R15. Figure 2.1 shows the general registers. R0*1 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15, SP (hardware stack pointer)*2 0 31 1. 2. R0 functions as an index register in the indirect indexed register addressing mode and indirect indexed GBR addressing mode. In some instructions, R0 functions as a fixed source register or destination register. R15 functions as a hardware stack pointer (SP) during exception processing. Notes: Figure 2.1 General Registers |
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