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HD64F3664FP bảng dữ liệu(PDF) 63 Page - Renesas Technology Corp |
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HD64F3664FP bảng dữ liệu(HTML) 63 Page - Renesas Technology Corp |
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63 / 444 page ![]() Section 2 CPU Rev. 6.00 Mar. 24, 2006 Page 35 of 412 REJ09B0142-0600 2.5 Addressing Modes and Effective Address Calculation The following describes the H8/300H CPU. In this LSI, the upper eight bits are ignored in the generated 24-bit address, so the effective address is 16 bits. 2.5.1 Addressing Modes The H8/300H CPU supports the eight addressing modes listed in table 2.10. Each instruction uses a subset of these addressing modes. Addressing modes that can be used differ depending on the instruction. For details, refer to appendix A.4, Combinations of Instructions and Addressing Modes. Arithmetic and logic instructions can use the register direct and immediate modes. Data transfer instructions can use all addressing modes except program-counter relative and memory indirect. Bit manipulation instructions use register direct, register indirect, or the absolute addressing mode to specify an operand, and register direct (BSET, BCLR, BNOT, and BTST instructions) or immediate (3-bit) addressing mode to specify a bit number in the operand. Table 2.10 Addressing Modes No. Addressing Mode Symbol 1 Register direct Rn 2 Register indirect @ERn 3 Register indirect with displacement @(d:16,ERn)/@(d:24,ERn) 4 Register indirect with post-increment Register indirect with pre-decrement @ERn+ @–ERn 5 Absolute address @aa:8/@aa:16/@aa:24 6 Immediate #xx:8/#xx:16/#xx:32 7 Program-counter relative @(d:8,PC)/@(d:16,PC) 8 Memory indirect @@aa:8 |
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