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PIC12F635E/SS датащи(PDF) 47 Page - Microchip Technology |
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PIC12F635E/SS датащи(HTML) 47 Page - Microchip Technology |
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47 / 196 page ![]() © 2005 Microchip Technology Inc. Preliminary DS41232B-page 45 PIC12F635/PIC16F636/639 4.2.4.2 RA1/C1IN-/VREF/ICSPCLK Figure 4-2 shows the diagram for this pin. The RA1 pin is configurable to function as one of the following: • a general purpose I/O • an analog input to the comparator • In-Circuit Serial Programming clock FIGURE 4-2: BLOCK DIAGRAM OF RA1 4.2.4.3 RA2/T0CKI/INT/C1OUT Figure 4-3 shows the diagram for this pin. The RA2 pin is configurable to function as one of the following: • a general purpose I/O • the clock input for TMR0 • an external edge-triggered interrupt • a digital output from the comparator FIGURE 4-3: BLOCK DIAGRAM OF RA2 I/O pin VDD VSS D Q CK Q D Q CK Q D Q CK Q D Q CK Q D EN Q D EN Q Data Bus WR WPUDA RD WPUDA RD PORTA RD PORTA WR PORTA WR TRISA RD TRISA WR IOCA RD IOCA Interrupt-on- To Comparator RAPU Analog Input Mode(1) change D Q CK Q WR WDA RD WDA VDD Weak Weak VSS Analog Input Mode(1) Q3 Note 1: Comparator mode determines Analog Input mode. I/O pin VDD VSS D Q CK Q D Q CK Q D Q CK Q D EN Q D EN Q RD PORTA WR PORTA WR TRISA RD TRISA WR IOCA RD IOCA 0 1 C1OUT To INT To TMR0 RD PORTA Interrupt-on- change D Q CK Q Data Bus WR WPUDA RD WPUDA RAPU D Q CK Q WR WDA RD WDA VDD Weak Weak VSS C1OUT Enable Q3 |
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