PIC16F688 Datasheet, PDF (118/174 Pages) Microchip Technology – 14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F688
FIGURE 11-10: WAKE-UP FROM SLEEP THROUGH INTERRUPT
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
OSC1
CLKOUT⁽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⁾
GIE bit
(INTCON<7>)
Processor in
Sleep
Instruction Flow
PC
PC
Instruction
Fetched
Inst(PC) = Sleep
Instruction
Executed
Inst(PC - 1)
PC+1
Inst(PC + 1)
Sleep
PC+2
PC+2
Inst(PC + 2)
Inst(PC + 1)
PC + 2
Dummy Cycle
0004h
Inst(0004h)
Dummy Cycle
0005h
Inst(0005h)
Inst(0004h)
Note 1:
2:
3:
4:
XT, HS or LP Oscillator mode assumed.
TOST = 1024 TOSC (drawing not to scale). This delay does not apply to EC and RC Oscillator modes.
GIE = 1 assumed. In this case after wake-up, the processor jumps to 0004h. If GIE = 0, execution will continue in-line.
CLKOUT is not available in XT, HS, LP or EC Oscillator modes, but shown here for timing reference.
DS41203B-page 116
Preliminary
 2004 Microchip Technology Inc.