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PIC18F258-E/LSQTP 数据表(PDF) 13 Page - Microchip Technology |
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PIC18F258-E/LSQTP 数据表(HTML) 13 Page - Microchip Technology |
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13 / 402 page ![]() © 2006 Microchip Technology Inc. DS41159E-page 11 PIC18FXX8 PORTA is a bidirectional I/O port. RA0/AN0/CVREF RA0 AN0 CVREF 22 19 3 I/O I O TTL Analog Analog Digital I/O. Analog input 0. Comparator voltage reference output. RA1/AN1 RA1 AN1 33 20 4 I/O I TTL Analog Digital I/O. Analog input 1. RA2/AN2/VREF- RA2 AN2 VREF- 44 21 5 I/O I I TTL Analog Analog Digital I/O. Analog input 2. A/D reference voltage (Low) input. RA3/AN3/VREF+ RA3 AN3 VREF+ 55 22 6 I/O I I TTL Analog Analog Digital I/O. Analog input 3. A/D reference voltage (High) input. RA4/T0CKI RA4 T0CKI 66 23 7 I/O I TTL/OD ST Digital I/O – open-drain when configured as output. Timer0 external clock input. RA5/AN4/SS/LVDIN RA5 AN4 SS LVDIN 77 24 8 I/O I I I TTL Analog ST Analog Digital I/O. Analog input 4. SPI™ slave select input. Low-Voltage Detect input. RA6 See the OSC2/CLKO/RA6 pin. TABLE 1-2: PIC18FXX8 PINOUT I/O DESCRIPTIONS (CONTINUED) Pin Name Pin Number Pin Type Buffer Type Description PIC18F248/258 PIC18F448/458 SPDIP, SOIC PDIP TQFP PLCC 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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