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| PIC18FXX8 Datasheet, PDF (277/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module | |||
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PIC18FXX8
FIGURE 24-2:
WAKE-UP FROM SLEEP THROUGH INTERRUPT(1,2)
OSC1
CLKO(4)
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
INT pin
INTF Flag
(INTCON<1>)
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
TOST(2)
Interrupt Latency(3)
GIEH bit
(INTCON<7>)
INSTRUCTION FLOW
PC
PC
Instruction
Fetched
Inst(PC) = Sleep
Instruction
Executed
Inst(PC â 1)
Processor in
Sleep
PC + 2
Inst(PC + 2)
Sleep
PC + 4
PC + 4
Inst(PC + 4)
Inst(PC + 2)
PC + 4
Dummy Cycle
0008h
Inst(0008h)
Dummy Cycle
000Ah
Inst(000Ah)
Inst(0008h)
Note
1: XT, HS or LP Oscillator mode assumed.
2: GIE = 1 assumed. In this case, after wake-up, the processor jumps to the interrupt routine. If GIE = 0, execution will continue in-line.
3: TOST = 1024 TOSC (drawing not to scale). This delay will not occur for RC and EC Oscillator modes.
4: CLKO is not available in these oscillator modes but shown here for timing reference.
 2004 Microchip Technology Inc.
DS41159D-page 275
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