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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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ST20C4 Fiches technique(PDF) 124 Page - STMicroelectronics |
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ST20C4 Fiches technique(HTML) 124 Page - STMicroelectronics |
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124 / 212 page  lsum ® 124/212 lsum long sum Code: 23 F7 Description: Add unsigned numbers with carry in and carry out. Add Breg to Areg (treated as unsigned numbers) plus carry in from Creg, producing the sum in Areg and carry out in Breg, without checking for overflow. Definition: if (sum > MostPosUnsigned) { Areg ′ unsigned ← sum − 2BitsPerWord Breg ′← 1 } else { Areg ′ unsigned ← sum Breg ′← 0 } Creg ′← undefined where sum = Areg unsigned + Bregunsigned + Creg0 – the value of sum is calculated to unlimited precision Error signals: none Comments: Secondar y instruction. See also: ladd |
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