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PIC16F870/P 데이터시트(PDF) 30 Page - Microchip Technology |
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PIC16F870/P 데이터시트(HTML) 30 Page - Microchip Technology |
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30 / 156 page ![]() PIC16F870/871 DS30569A-page 30 Preliminary © 1999 Microchip Technology Inc. TABLE 3-3: PORTB FUNCTIONS TABLE 3-4: SUMMARY OF REGISTERS ASSOCIATED WITH PORTB Name Bit# Buffer Function RB0/INT bit0 TTL/ST(1) Input/output pin or external interrupt input. Internal software programmable weak pull-up. RB1 bit1 TTL Input/output pin. Internal software programmable weak pull-up. RB2 bit2 TTL Input/output pin. Internal software programmable weak pull-up. RB3/PGM bit3 TTL/ST(1) Input/output pin or programming pin in LVP mode. Internal software programmable weak pull-up. RB4 bit4 TTL Input/output pin (with interrupt on change). Internal software programmable weak pull-up. RB5 bit5 TTL Input/output pin (with interrupt on change). Internal software programmable weak pull-up. RB6/PGC bit6 TTL/ST(2) Input/output pin (with interrupt on change) or In-Circuit Debugger pin. Internal software programmable weak pull-up. Serial programming clock. RB7/PGD bit7 TTL/ST(2) Input/output pin (with interrupt on change) or In-Circuit Debugger pin. Internal software programmable weak pull-up. Serial programming data. Legend: TTL = TTL input, ST = Schmitt Trigger input Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt or LVP mode. 2: This buffer is a Schmitt Trigger input when used in serial programming mode. Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on: POR, BOR Value on all other resets 06h, 106h PORTB RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 xxxx xxxx uuuu uuuu 86h, 186h TRISB PORTB Data Direction Register 1111 1111 1111 1111 81h, 181h OPTION_REG RBPU INTEDG T0CS T0SE PSA PS2 PS1 PS0 1111 1111 1111 1111 Legend: x = unknown, u = unchanged. Shaded cells are not used by PORTB. |
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