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PIC16F688-I/ML Datasheet(PDF) 123 Page - Microchip Technology

Part # PIC16F688-I/ML
Description  14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology
PDF  204 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F688-I/ML Datasheet(HTML) 123 Page - Microchip Technology

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© 2009 Microchip Technology Inc.
DS41203E-page 121
PIC16F688
FIGURE 11-8:
INT PIN INTERRUPT TIMING
TABLE 11-6:
SUMMARY OF REGISTERS ASSOCIATED WITH INTERRUPTS
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on
all other
Resets
INTCON
GIE
PEIE
T0IE
INTE
RAIE
T0IF
INTF
RAIF
0000 000x
0000 000x
PIE1
EEIE
ADIE
RCIE
C2IE
C1IE
OSFIE
TXIE
TMR1IE
0000 0000
0000 0000
PIR1
EEIF
ADIF
RCIF
C2IF
C1IF
OSFIF
TXIF
TMR1IF
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 two-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 14.0 “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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