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PIC16 Datasheet(PDF) 74 Page - Microchip Technology |
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PIC16 Datasheet(HTML) 74 Page - Microchip Technology |
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74 / 418 page  PIC16(L)F1508/9 DS40001609C-page 74 2011-2013 Microchip Technology Inc. FIGURE 7-3: INT PIN INTERRUPT TIMING Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 FOSC CLKOUT INT pin INTF GIE INSTRUCTION FLOW PC Instruction Fetched Instruction Executed Interrupt Latency PC PC + 1 PC + 1 0004h 0005h Inst (0004h) Inst (0005h) Forced NOP Inst (PC) Inst (PC + 1) Inst (PC – 1) Inst (0004h) Forced NOP Inst (PC) — Note 1: INTF flag is sampled here (every Q1). 2: 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. 3: For minimum width of INT pulse, refer to AC specifications in Section 29.0 “Electrical Specifications”. 4: INTF is enabled to be set any time during the Q4-Q1 cycles. (1) (2) (3) (4) (1) |
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