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PIC16F684-E/ST Datasheet(PDF) 105 Page - Microchip Technology

Part # PIC16F684-E/ST
Description  14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology
PDF  164 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F684-E/ST Datasheet(HTML) 105 Page - Microchip Technology

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 2004 Microchip Technology Inc.
Preliminary
DS41202C-page 103
PIC16F684
FIGURE 12-8:
INT PIN INTERRUPT TIMING
TABLE 12-6:
SUMMARY OF INTERRUPT REGISTERS
Address
Name
Bit 7Bit 6Bit 5
Bit 4Bit 3Bit 2
Bit 1Bit 0
Value on
POR, BOD
Value on
all other
Resets
0Bh, 8Bh INTCON
GIE
PEIE
T0IE
INTE
RAIE
T0IF
INTF
RAIF
0000 0000
0000 0000
0Ch
PIR1
EEIF
ADIF
CCP1IF
C2IF
C1IF
OSFIF
TMR2IF
TMR1IF
0000 0000
0000 0000
8Ch
PIE1
EEIE
ADIE
CCP1IE
C2IE
C1IE
OSFIE
TMR2IE TMR1IE
0000 0000
0000 0000
Legend:
x
= unknown, u = unchanged, — = unimplemented read as ‘0’, q = value depends upon condition.
Shaded cells are not used by the interrupt module.
Q2
Q1
Q3
Q4
Q2
Q1
Q3
Q4
Q2
Q1
Q3
Q4
Q2
Q1
Q3
Q4
Q2
Q1
Q3
Q4
OSC1
CLKOUT
INT pin
INTF flag
(INTCON<1>)
GIE bit
(INTCON<7>)
INSTRUCTION FLOW
PC
Instruction
Fetched
Instruction
Executed
Interrupt Latency
PC
PC + 1
PC + 1
0004h
0005h
Inst (0004h)
Inst (0005h)
Dummy Cycle
Inst (PC)
Inst (PC + 1)
Inst (PC – 1)
Inst (0004h)
Dummy Cycle
Inst (PC)
—
Note 1:
INTF flag is sampled here (every Q1).
2:
Asynchronous interrupt latency = 3-4 TCY. Synchronous latency = 3 TCY, where TCY = instruction cycle time. Latency
is the same whether Inst (PC) is a single cycle or a 2-cycle instruction.
3:
CLKOUT is available only in INTOSC and RC Oscillator modes.
4:
For minimum width of INT pulse, refer to AC specifications in Section 15.0 “Electrical Specifications”.
5:
INTF is enabled to be set any time during the Q4-Q1 cycles.
(1)
(2)
(3)
(4)
(5)
(1)



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