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PIC16F684 датащи(PDF) 125 Page - Microchip Technology |
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PIC16F684 датащи(HTML) 125 Page - Microchip Technology |
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125 / 192 page ![]() © 2007 Microchip Technology Inc. DS41202F-page 123 PIC16F684 SUBWF Subtract W from f Syntax: [ label ] SUBWF f,d Operands: 0 ≤ f ≤ 127 d ∈ [0,1] Operation: (f) - (W) → (destination) Status Affected: C, DC, Z Description: Subtract (2’s complement method) W register from register ‘f’. If ‘d’ is ‘0’, the result is stored in the W register. If ‘d’ is ‘1’, the result is stored back in register ‘f. SWAPF Swap Nibbles in f Syntax: [ label ] SWAPF f,d Operands: 0 ≤ f ≤ 127 d ∈ [0,1] Operation: (f<3:0>) → (destination<7:4>), (f<7:4>) → (destination<3:0>) Status Affected: None Description: The upper and lower nibbles of register ‘f’ are exchanged. If ‘d’ is ‘0’, the result is placed in the W register. If ‘d’ is ‘1’, the result is placed in register ‘f’. C = 0 W > f C = 1 W ≤ f DC = 0 W<3:0> > f<3:0> DC = 1 W<3:0> ≤ f<3:0> XORLW Exclusive OR literal with W Syntax: [ label ] XORLW k Operands: 0 ≤ k ≤ 255 Operation: (W) .XOR. k → (W) Status Affected: Z Description: The contents of the W register are XOR’ed with the eight-bit literal ‘k’. The result is placed in the W register. XORWF Exclusive OR W with f Syntax: [ label ] XORWF f,d Operands: 0 ≤ f ≤ 127 d ∈ [0,1] Operation: (W) .XOR. (f) → (destination) Status Affected: Z Description: Exclusive OR the contents of the W register with register ‘f’. If ‘d’ is ‘0’, the result is stored in the W register. If ‘d’ is ‘1’, the result is stored back in register ‘f’. |
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