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PIC12CE519-04/ESM Datasheet(PDF) 23 Page - Microchip Technology |
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PIC12CE519-04/ESM Datasheet(HTML) 23 Page - Microchip Technology |
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23 / 113 page  © 1999 Microchip Technology Inc. DS40139E-page 23 PIC12C5XX FIGURE 5-2: SUCCESSIVE I/O OPERATION PC PC + 1 PC + 2 PC + 3 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Instruction fetched GP5:GP0 MOVWF GPIO NOP Port pin sampled here NOP MOVF GPIO,W Instruction executed MOVWF GPIO (Write to GPIO) NOP MOVF GPIO,W This example shows a write to GPIO followed by a read from GPIO. Data setup time = (0.25 TCY – TPD) where: TCY = instruction cycle. TPD = propagation delay Therefore, at higher clock frequencies, a write followed by a read may be problematic. (Read GPIO) Port pin written here |
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