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PIC16F84A Datasheet(PDF) 62 Page - Microchip Technology |
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PIC16F84A Datasheet(HTML) 62 Page - Microchip Technology |
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62 / 124 page  PIC16F8X DS30430C-page 62 © 1998 Microchip Technology Inc. IORWF Inclusive OR W with f Syntax: [ label ] IORWF f,d Operands: 0 ≤ f ≤ 127 d ∈ [0,1] Operation: (W) .OR. (f) → (destination) Status Affected: Z Encoding: 00 0100 dfff ffff Description: Inclusive OR the W register with regis- ter 'f'. If 'd' is 0 the result is placed in the W register. If 'd' is 1 the result is placed back in register 'f'. Words: 1 Cycles: 1 Q Cycle Activity: Q1 Q2 Q3 Q4 Decode Read register 'f' Process data Write to destination Example IORWF RESULT, 0 Before Instruction RESULT = 0x13 W = 0x91 After Instruction RESULT = 0x13 W = 0x93 Z = 1 MOVF Move f Syntax: [ label ] MOVF f,d Operands: 0 ≤ f ≤ 127 d ∈ [0,1] Operation: (f) → (destination) Status Affected: Z Encoding: 00 1000 dfff ffff Description: The contents of register f is moved to a destination dependant upon the status of d. If d = 0, destination is W register. If d = 1, the destination is file register f itself. d = 1 is useful to test a file regis- ter since status flag Z is affected. Words: 1 Cycles: 1 Q Cycle Activity: Q1 Q2 Q3 Q4 Decode Read register 'f' Process data Write to destination Example MOVF FSR, 0 After Instruction W = value in FSR register Z = 1 MOVLW Move Literal to W Syntax: [ label ] MOVLW k Operands: 0 ≤ k ≤ 255 Operation: k → (W) Status Affected: None Encoding: 11 00xx kkkk kkkk Description: The eight bit literal 'k' is loaded into W register . The don’t cares will assemble as 0’s. Words: 1 Cycles: 1 Q Cycle Activity: Q1 Q2 Q3 Q4 Decode Read literal 'k' Process data Write to W Example MOVLW 0x5A After Instruction W = 0x5A MOVWF Move W to f Syntax: [ label ] MOVWF f Operands: 0 ≤ f ≤ 127 Operation: (W) → (f) Status Affected: None Encoding: 00 0000 1fff ffff Description: Move data from W register to register 'f' . Words: 1 Cycles: 1 Q Cycle Activity: Q1 Q2 Q3 Q4 Decode Read register 'f' Process data Write register 'f' Example MOVWF OPTION_REG Before Instruction OPTION = 0xFF W = 0x4F After Instruction OPTION = 0x4F W = 0x4F |
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