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PIC18F258 Datasheet(PDF) 12 Page - Microchip Technology |
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PIC18F258 Datasheet(HTML) 12 Page - Microchip Technology |
12 / 384 page PIC18FXX8 DS41159B-page 10 Preliminary 2002 Microchip Technology Inc. TABLE 1-2: PIC18FXX8 PINOUT I/O DESCRIPTIONS Pin Name Pin Number Pin Type Buffer Type Description PIC18F248/258 PIC18F448/458 SPDIP, SOIC PDIP TQFP PLCC MCLR/VPP MCLR VPP 11 18 2 I P ST — Master Clear (input) or programming voltage (output). Master Clear (Reset) input. This pin is an active low RESET to the device. Programming voltage input. NC —— 12, 13, 33, 34 1, 17, 28, 40 —— These pins should be left unconnected. OSC1/CLKI OSC1 CLKI 9 133014 I I CMOS/ST CMOS Oscillator crystal or external clock input. Oscillator crystal input or external clock source input. ST buffer when configured in RC mode. Otherwise CMOS. External clock source input. Always associated with pin function OSC1 (see OSC1/ CLKI, OSC2/CLKO pins). OSC2/CLKO/RA6 OSC2 CLKO RA6 10 14 31 15 O O I/O — — TTL Oscillator crystal or clock output. Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode. In RC mode, OSC2 pin outputs CLKO, which has 1/4 the frequency of OSC1 and denotes the instruction cycle rate. General purpose I/O pin. Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output ST = Schmitt Trigger input with CMOS levels Analog = Analog input I = Input O = Output P = Power OD = Open Drain (no P diode to VDD) |
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