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PIC12C67X Datasheet(PDF) 79 Page - Microchip Technology |
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PIC12C67X Datasheet(HTML) 79 Page - Microchip Technology |
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79 / 129 page  © 1999 Microchip Technology Inc. DS30561B-page 79 PIC12C67X 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 Example RETURN After Interrupt PC = TOS RLF Rotate Left f through Carry Syntax: [ label ] RLF f,d Operands: 0 ≤ f ≤ 127 d ∈ [0,1] Operation: See description below Status Affected: C Encoding: 00 1101 dfff ffff Description: The contents of register ’f’ are rotated one bit to the left through the Carry Flag. If ’d’ is 0, the result is placed in the W register. If ’d’ is 1, the result is stored back in reg- ister ’f’. Words: 1 Cycles: 1 Example RLF REG1,0 Before Instruction REG1 = 1110 0110 C =0 After Instruction REG1 = 1110 0110 W = 1100 1100 C =1 Register f C 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 reg- ister ’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. Words: 1 Cycles: 1 Example: SLEEP Register f C |
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