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HD64F2149YV Folha de dados(PDF) 74 Page - Renesas Technology Corp |
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HD64F2149YV Folha de dados(HTML) 74 Page - Renesas Technology Corp |
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74 / 1075 page ![]() Section 2 CPU Rev. 3.00 Jan 18, 2006 page 46 of 1044 REJ09B0280-0300 Operations can be performed on the CCR bits by the LDC, STC, ANDC, ORC, and XORC instructions. The N, Z, V, and C flags are used as branching conditions for conditional branch (Bcc) instructions. 2.4.4 Initial Register Values Reset exception handling loads the CPU's program counter (PC) from the vector table, clears the trace bit in EXR to 0, and sets the interrupt mask bits in CCR and EXR to 1. The other CCR bits and the general registers are not initialized. In particular, the stack pointer (ER7) is not initialized. The stack pointer should therefore be initialized by an MOV.L instruction executed immediately after a reset. |
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