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H8S/2214 数据表(PDF) 148 Page - Renesas Technology Corp |
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H8S/2214 数据表(HTML) 148 Page - Renesas Technology Corp |
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148 / 936 page ![]() Section 4 Exception Handling Rev.4.00 Sep. 18, 2008 Page 88 of 872 REJ09B0189-0400 4.5 Trap Instruction Trap instruction exception handling starts when a TRAPA instruction is executed. Trap instruction exception handling can be executed at all times in the program execution state. The TRAPA instruction fetches a start address from a vector table entry corresponding to a vector number from 0 to 3, as specified in the instruction code. Table 4.5 shows the status of CCR and EXR after execution of trap instruction exception handling. Table 4.5 Status of CCR and EXR after Trap Instruction Exception Handling CCR EXR Interrupt Control Mode I UI I2 to I0 T 0 1 — — — 2 1 — — 0 Legend: 1: Set to 1 0: Cleared to 0 —: Retains value prior to execution. |
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