PIC16LF1507 Datasheet, PDF (64/266 Pages) Microchip Technology – 20-Pin Flash, 8-Bit Microcontrollers

PIC16(L)F1507
FIGURE 7-3:
INT PIN INTERRUPT TIMING
FOSC
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
CLKOUT
INT pin
INTF
(3)
(1)
(1)
(4)
Interrupt Latency ⁽²⁾
GIE
INSTRUCTION FLOW
PC
PC
Instruction
Fetched
Inst (PC)
PC + 1
Inst (PC + 1)
PC + 1
—
0004h
Inst (0004h)
0005h
Inst (0005h)
Instruction
Executed
Inst (PC – 1)
Inst (PC)
Forced NOP
Forced NOP
Inst (0004h)
Note 1:
2:
3:
4:
INTF flag is sampled here (every Q1).
Asynchronous interrupt latency = 3-5 TCY. Synchronous latency = 3-4 TCY, where TCY = instruction cycle time.
Latency is the same whether Inst (PC) is a single cycle or a 2-cycle instruction.
For minimum width of INT pulse, refer to AC specifications in Section 25.0 “Electrical Specifications””.
INTF is enabled to be set any time during the Q4-Q1 cycles.
 2011 Microchip Technology Inc.
Preliminary
DS41586A-page 64