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H8SX/1663R データシート(PDF) 76 Page - Renesas Technology Corp |
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H8SX/1663R データシート(HTML) 76 Page - Renesas Technology Corp |
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76 / 1504 page ![]() Section 2 CPU Rev. 2.00 Sep. 24, 2008 Page 44 of 1468 REJ09B0412-0200 General register ER7 has the function of stack pointer (SP) in addition to its general-register function, and is used implicitly in exception handling and subroutine branches. Figure 2.11 shows the stack. Free area Stack area SP (ER7) Figure 2.11 Stack 2.5.2 Program Counter (PC) PC is a 32-bit counter that indicates the address of the next instruction the CPU will execute. The length of all CPU instructions is 16 bits (one word) or a multiple of 16 bits, so the least significant bit is ignored. (When the instruction code is fetched, the least significant bit is regarded as 0. |
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