PIC18F6585 Datasheet, PDF (360/496 Pages) Microchip Technology – 64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module

PIC18F6585/8585/6680/8680
FIGURE 24-2:
WAKE-UP FROM SLEEP THROUGH INTERRUPT^(1,2)
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
OSC1
CLKO⁽⁴⁾
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
TOST⁽²⁾
INT pin
INTF Flag
(INTCON<1>)
Interrupt Latency⁽³⁾
GIEH bit
(INTCON<7>)
Processor in
Sleep
INSTRUCTION FLOW
PC
PC
Instruction
Fetched
Inst(PC) = Sleep
Instruction
Executed
Inst(PC - 1)
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.
DS30491C-page 358
 2004 Microchip Technology Inc.