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PIC16F84A Datasheet(PDF) 64 Page - Microchip Technology |
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PIC16F84A Datasheet(HTML) 64 Page - Microchip Technology |
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64 / 124 page  PIC16F8X DS30430C-page 64 © 1998 Microchip Technology Inc. RETLW Return with Literal in W Syntax: [ label ] RETLW k Operands: 0 ≤ k ≤ 255 Operation: k → (W); TOS → PC Status Affected: None Encoding: 11 01xx kkkk kkkk Description: The W register is loaded with the eight bit literal 'k'. The program counter is loaded from the top of the stack (the return address). This is a two cycle instruction. Words: 1 Cycles: 2 Q Cycle Activity: Q1 Q2 Q3 Q4 1st Cycle Decode Read literal 'k' No-Opera tion Write to W, Pop from the Stack 2nd Cycle No-Operat ion No-Opera tion No-Opera tion No-Operat ion Example TABLE CALL TABLE ;W contains table ;offset value • ;W now has table value • • ADDWF PC ;W = offset RETLW k1 ;Begin table RETLW k2 ; • • • RETLW kn ; End of table Before Instruction W = 0x07 After Instruction W = value of k8 RETURN Return from Subroutine Syntax: [ label ] RETURN Operands: None Operation: TOS → PC Status Affected: None Encoding: 00 0000 0000 1000 Description: Return from subroutine. The stack is POPed and the top of the stack (TOS) is loaded into the program counter. This is a two cycle instruction. Words: 1 Cycles: 2 Q Cycle Activity: Q1 Q2 Q3 Q4 1st Cycle Decode No-Opera tion No-Opera tion Pop from the Stack 2nd Cycle No-Operat ion No-Opera tion No-Opera tion No-Opera tion Example RETURN After Interrupt PC = TOS |
Similar Part No. - PIC16F84A |
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Similar Description - PIC16F84A |
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