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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M68ICS08GR датащи(PDF) 145 Page - Freescale Semiconductor, Inc |
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M68ICS08GR датащи(HTML) 145 Page - Freescale Semiconductor, Inc |
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145 / 408 page  Central Processing Unit (CPU) Arithmetic/logic unit (ALU) MC68HC908GR8 — Rev 4.0 Technical Data MOTOROLA Central Processing Unit (CPU) 145 N — Negative flag The CPU sets the negative flag when an arithmetic operation, logic operation, or data manipulation produces a negative result, setting bit 7 of the result. 1 = Negative result 0 = Non-negative result Z — Zero flag The CPU sets the zero flag when an arithmetic operation, logic operation, or data manipulation produces a result of $00. 1 = Zero result 0 = Non-zero result C — Carry/borrow flag The CPU sets the carry/borrow flag when an addition operation produces a carry out of bit 7 of the accumulator or when a subtraction operation requires a borrow. Some instructions - such as bit test and branch, shift, and rotate - also clear or set the carry/borrow flag. 1 = Carry out of bit 7 0 = No carry out of bit 7 10.5 Arithmetic/logic unit (ALU) The ALU performs the arithmetic and logic operations defined by the instruction set. Refer to the CPU08 Reference Manual (Motorola document number CPU08RM/AD) for a description of the instructions and addressing modes and more detail about CPU architecture. 10.6 Low-power modes The WAIT and STOP instructions put the MCU in low--power consumption standby modes. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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