PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 273
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PIC18F258
Manufacturer Part Number
PIC18F258
Description
High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F258.pdf
(384 pages)
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FIGURE 24-2:
GIEH bit
(INTCON<7>)
Note
INTF flag
(INTCON<1>)
2002 Microchip Technology Inc.
INSTRUCTION FLOW
Instruction
Fetched
Instruction
Executed
CLKO
INT pin
OSC1
1:
2:
3:
4:
PC
(4)
XT, HS or LP Oscillator mode assumed.
GIE = ’1’ assumed. In this case, after wake-up, the processor jumps to the interrupt routine. If GIE = ’0’, execution will continue in-line.
T
CLKO is not available in these Osc modes, but shown here for timing reference.
OST
Inst(PC) = SLEEP
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
Inst(PC - 1)
= 1024 T
PC
WAKE-UP FROM SLEEP THROUGH INTERRUPT
OSC
(drawing not to scale). This delay will not occur for RC and EC Osc modes.
Inst(PC + 2)
SLEEP
PC+2
Processor in
SLEEP
PC+4
Preliminary
T
OST
(2)
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Inst(PC + 4)
Inst(PC + 2)
PC+4
Interrupt Latency
Dummy Cycle
PC + 4
(1,2)
(3)
Dummy Cycle
PIC18FXX8
Inst(0008h)
0008h
DS41159B-page 271
Inst(000Ah)
Inst(0008h)
000Ah
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