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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PIC18F4539-E/MLSQTP 데이터시트(PDF) 16 Page - Microchip Technology |
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PIC18F4539-E/MLSQTP 데이터시트(HTML) 16 Page - Microchip Technology |
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16 / 322 page  PIC18FXX39 DS30485A-page 14 Preliminary 2002 Microchip Technology Inc. TABLE 1-3: PIC18F4X39 PINOUT I/O DESCRIPTIONS Pin Name Pin Number Pin Type Buffer Type Description DIP QFN TQFP MCLR/VPP MCLR VPP 118 18 I I ST ST Master Clear (input) or high voltage ICSP programming enable pin. Master Clear (Reset) input. This pin is an active low RESET to the device. High voltage ICSP programming enable pin. OSC1/CLKI OSC1 CLKI 13 32 30 I I CMOS CMOS Oscillator crystal or external clock input. Oscillator crystal input or external clock source input. External clock source input. Always associated with pin function OSC1. (See related OSC1/CLKI, OSC2/CLKO pins.) OSC2/CLKO/RA6 OSC2 CLKO RA6 14 33 31 O O I/O — — TTL Oscillator crystal or clock output. Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode. In EC mode, OSC2 pin outputs CLKO, which has 1/4 the frequency of OSC1 and denotes the instruction cycle rate. General purpose I/O pin. PORTA is a bi-directional I/O port. RA0/AN0 RA0 AN0 219 19 I/O I TTL Analog Digital I/O. Analog input 0. RA1/AN1 RA1 AN1 320 20 I/O I TTL Analog Digital I/O. Analog input 1. RA2/AN2/VREF- RA2 AN2 VREF- 421 21 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+ 522 22 I/O I I TTL Analog Analog Digital I/O. Analog input 3. A/D Reference Voltage (High) input. RA4/T0CKI RA4 T0CKI 623 23 I/O I ST/OD ST Digital I/O. Open drain when configured as output. Timer0 external clock input. RA5/AN4/SS/LVDIN RA5 AN4 SS LVDIN 724 24 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.) Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output ST = Schmitt Trigger input with CMOS levels I = Input O= Output P = Power OD = Open Drain (no P diode to VDD) |
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