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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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STC89LE53RC bảng dữ liệu(PDF) 58 Page - STCmicro Technology Co,.Ltd |
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STC89LE53RC bảng dữ liệu(HTML) 58 Page - STCmicro Technology Co,.Ltd |
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58 / 165 page  JNC rel Function: Jump if Carry not set Description: If the carry flag is a zero, branch to the address indicated; otherwise proceed with the next instruction. The branch destination is computed by adding the signed relative-displacement in the second instruction byte to the PC, after incrementing the PC twice to point to the next instruction. The carry flag is not modified Example: The carry flag is set. The instruction sequence, JNC LABEL1 CPL C JNC LABEL2 will clear the carry and cause program execution to continue at the instruction identified by the label LABEL2. Bytes: 2 Cycles: 2 Encoding: 0 1 0 1 0 0 0 0 rel. address Operation: JNC (PC) ← (PC)+ 2 ← (PC)+ 2 (PC)+ 2 IF (C) = 0 THEN (PC) ← (PC) + rel ← (PC) + rel (PC) + rel JNZ rel Function: Jump if Accumulator Not Zero Description: If any bit of the Accumulator is a one, branch to the indicated address; otherwise proceed with the next instruction. The branch destination is computed by adding the signed relative- displacement in the second instruction byte to the PC, after incrementing the PC twice. The Accumulator is not modified. No flags are affected. Example: The Accumulator originally holds 00H. The instruction sequence, JNZ LABEL1 INC A JNZ LAEEL2 will set the Accumulator to 01H and continue at label LABEL2. Bytes: 2 Cycles: 2 Encoding: 0 1 1 1 0 0 0 0 rel. address Operation: JNZ (PC) ← (PC)+ 2 ← (PC)+ 2 (PC)+ 2 IF (A) ≠ 0 THEN (PC) ← (PC) + rel ← (PC) + rel (PC) + rel 58 |
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