PIC16C923-04I/CL Microchip Technology, PIC16C923-04I/CL Datasheet - Page 114

• Manufacturer Part Number: PIC16C923-04I/CL
• Description: 8-Bit CMOS Microcontroller with LCD Driver
• Manufacturer: Microchip Technology

PIC16C9XX
FIGURE 14-14:INTERRUPT LOGIC
FIGURE 14-15:INT PIN INTERRUPT TIMING
DS30444E - page 114
INSTRUCTION FLOW
Note 1: INTF flag is sampled here (every Q1).
GIE bit
(INTCON<7>)
INTF flag
(INTCON<1>)
CLKOUT
INT pin
OSC1
Instruction
executed
Instruction
fetched
The A/D module interrupt is implemented on the PIC16C924 only.
PC
2: Interrupt latency = 3-4 T
3: CLKOUT is available only in RC oscillator mode.
4: For minimum width of INT pulse, refer to AC specs.
5: INTF can be set anytime during the Q4-Q1 cycles.
Latency is the same whether Inst (PC) is a single cycle or a 2-cycle instruction.
ADIF
ADIE
TMR1IF
TMR1IE
3
SSPIF
SSPIE
Q1
CCP1IF
CCP1IE
TMR2IF
TMR2IE
Inst (PC-1)
Inst (PC)
1
Q2
PC
Q3
LCDIF
LCDIE
4
CY
Q4
5
where T
Q1
Inst (PC+1)
Inst (PC)
CY
Q2
1
= instruction cycle time.
PC+1
Q3
Q4
Interrupt Latency
Q1
GIE
Dummy Cycle
INTF
INTE
RBIF
RBIE
PEIF
PEIE
T0IF
T0IE
Q2
PC+1
—
Q3
Q4
2
Q1
Dummy Cycle
Inst (0004h)
Q2
0004h
Q3
1997 Microchip Technology Inc.
Wake-up (If in SLEEP mode)
Q4
Q1
Interrupt to CPU
Inst (0005h)
Q2
Inst (0004h)
0005h
Q3
Q4