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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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EM73880 Fiches technique(PDF) 10 Page - ELAN Microelectronics Corp |
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EM73880 Fiches technique(HTML) 10 Page - ELAN Microelectronics Corp |
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10 / 40 page  10 * This specification are subject to be changed without notice. EM73880 EM73880 EM73880 EM73880 EM73880 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 11.30.2001 Preliminary Preliminary Preliminary Preliminary Preliminary EXAMPLE: Operation Carry Zero 8-4=4 1 0 7-F= -8(1000) 0 0 9-9=0 1 1 ALU ALU ALU ALU ALU The arithematic operation of 4 - bit data is performed in ALU unit. There are 2 flags can be affected by the result of ALU operation, ZF and SF . The operation of ALU can be affected by CF only . ALU STRUCTURE ALU STRUCTURE ALU STRUCTURE ALU STRUCTURE ALU STRUCTURE ALU supported user arithematic operation function, including : addition, subtraction and rotaion. ALU FUNCTION ALU FUNCTION ALU FUNCTION ALU FUNCTION ALU FUNCTION (1) Addition: For instruction ADDAM, ADCAM, ADDM #k, ADD #k,y .... ALU supports addition function. The addition operation can affect CF and ZF. For addition operation, if the result is "0", ZF will be "1", otherwise, not equal "0", ZF will be "0", When the addition operation has a carry-out. CF will be "1", otherwise, CF will be "0". EXAMPLE: Operation Carry Zero 3+4=7 0 0 7+F=6 1 0 0+0=0 0 1 8+8=0 1 1 (2) Subtraction: For instruction SUBM #k, SUBA #k, SBCAM, DECM... ALU supports user subtraction function . The subtraction operation can affect CF and ZF, For subtraction operation, if the result is negative, CF will be "0", it means a borrow out, otherwise, if the result is positive, CF will be "1". For ZF, if the result of subtraction operation is "0", the ZF will be "1", otherwise, ZF will be "1". ZF CF SF ALU DATA BUS |
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