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PIC16F-E/ML 数据表(PDF) 128 Page - Microchip Technology |
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PIC16F-E/ML 数据表(HTML) 128 Page - Microchip Technology |
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128 / 178 page ![]() PIC16F627A/628A/648A DS40044F-page 126 © 2007 Microchip Technology Inc. RRF Rotate Right f through Carry Syntax: [ label ] RRF f,d Operands: 0 ≤ f ≤ 127 d ∈ [0,1] Operation: See description below Status Affected: C Encoding: 00 1100 dfff ffff Description: The contents of register ‘f’ are rotated one bit to the right through the Carry Flag. 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 Example RRF REG1, 0 Before Instruction REG1 = 1110 0110 C =0 After Instruction REG1 = 1110 0110 W = 0111 0011 C =0 SLEEP Syntax: [ label ] SLEEP Operands: None Operation: 00h → WDT, 0 → WDT prescaler, 1 → TO, 0 → PD Status Affected: TO, PD Encoding: 00 0000 0110 0011 Description: The power-down Status bit, PD is cleared. Time out Status bit, TO is set. Watchdog Timer and its prescaler are cleared. The processor is put into Sleep mode with the oscillator stopped. See Section 14.8 “Power-Down Mode (Sleep)” for more details. Words: 1 Cycles: 1 Example: SLEEP REGISTER F C SUBLW Subtract W from Literal Syntax: [ label ]SUBLW k Operands: 0 ≤ k ≤ 255 Operation: k - (W) → (W) Status Affected: C, DC, Z Encoding: 11 110x kkkk kkkk Description: The W register is subtracted (2’s complement method) from the eight- bit literal ‘k’. The result is placed in the W register. Words: 1 Cycles: 1 Example 1: SUBLW 0x02 Before Instruction W= 1 C= ? After Instruction W= 1 C= 1; result is positive Example 2: Before Instruction W= 2 C= ? After Instruction W= 0 C= 1; result is zero Example 3: Before Instruction W= 3 C= ? After Instruction W= 0xFF C = 0 ; result is negative |
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