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STC89LE53RC 데이터시트(PDF) 48 Page - STCmicro Technology Co,.Ltd |
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STC89LE53RC 데이터시트(HTML) 48 Page - STCmicro Technology Co,.Ltd |
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48 / 165 page ![]() CLR A Function: Clear Accumulator Description: The Aecunmlator is cleared (all bits set on zero). No flags are affected. Example: The Accumulator contains 5CH (01011100B). The instruction, CLR A will leave the Accumulator set to 00H (00000000B). Bytes: 1 Cycles: 1 Encoding: 1 1 1 0 0 1 0 0 Operation: CLR (A)← 0 ← 00 CLR bit Function: Clear bit Description: The indicated bit is cleared (reset to zero). No other flags are affected. CLR can operate on the carry flag or any directly addressable bit. Example: Port 1 has previously been written with 5DH (01011101B). The instruction, CLR P1.2 will leave the port set to 59H (01011001B). CLR C Bytes: 1 Cycles: 1 Encoding: 1 1 0 0 0 0 1 1 Operation: CLR (C) ← 0 ← 00 CLR bit Bytes: 2 Cycles: 1 Encoding: 1 1 0 0 0 0 1 0 bit address Operation: CLR (bit) ← 0 ← 00 48 |
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