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PIC16F84A-04-P Datasheet(PDF) 4 Page - Microchip Technology |
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PIC16F84A-04-P Datasheet(HTML) 4 Page - Microchip Technology |
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4 / 90 page  PIC16F84A DS35007C-page 4 2001-2013 Microchip Technology Inc. TABLE 1-1: PIC16F84A PINOUT DESCRIPTION Pin Name PDIP No. SOIC No. SSOP No. I/O/P Type Buffer Type Description OSC1/CLKIN 16 16 18 I ST/CMOS(3) Oscillator crystal input/external clock source input. OSC2/CLKOUT 15 15 19 O — Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode. In RC mode, OSC2 pin outputs CLKOUT, which has 1/4 the frequency of OSC1 and denotes the instruction cycle rate. MCLR 4 4 4 I/P ST Master Clear (Reset) input/programming voltage input. This pin is an active low RESET to the device. PORTA is a bi-directional I/O port. RA0 17 17 19 I/O TTL RA1 18 18 20 I/O TTL RA2 1 1 1 I/O TTL RA3 2 2 2 I/O TTL RA4/T0CKI 3 3 3 I/O ST Can also be selected to be the clock input to the TMR0 timer/counter. Output is open drain type. PORTB is a bi-directional I/O port. PORTB can be software programmed for internal weak pull-up on all inputs. RB0/INT 6 6 7 I/O TTL/ST(1) RB0/INT can also be selected as an external interrupt pin. RB1 7 7 8 I/O TTL RB2 8 8 9 I/O TTL RB3 9 9 10 I/O TTL RB4 10 10 11 I/O TTL Interrupt-on-change pin. RB5 11 11 12 I/O TTL Interrupt-on-change pin. RB6 12 12 13 I/O TTL/ST(2) Interrupt-on-change pin. Serial programming clock. RB7 13 13 14 I/O TTL/ST(2) Interrupt-on-change pin. Serial programming data. VSS 5 5 5,6 P — Ground reference for logic and I/O pins. VDD 14 14 15,16 P — Positive supply for logic and I/O pins. Legend: I= input O = Output I/O = Input/Output P = Power — = Not used TTL = TTL input ST = Schmitt Trigger input Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt. 2: This buffer is a Schmitt Trigger input when used in Serial Programming mode. 3: This buffer is a Schmitt Trigger input when configured in RC oscillator mode and a CMOS input otherwise. |
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