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PIC16F877ATI/SP 数据表(PDF) 11 Page - Microchip Technology |
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PIC16F877ATI/SP 数据表(HTML) 11 Page - Microchip Technology |
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11 / 234 page  2003 Microchip Technology Inc. DS39582B-page 9 PIC16F87XA PORTB is a bidirectional I/O port. PORTB can be software programmed for internal weak pull-ups on all inputs. RB0/INT RB0 INT 21 18 I/O I TTL/ST(1) Digital I/O. External interrupt. RB1 22 19 I/O TTL Digital I/O. RB2 23 20 I/O TTL Digital I/O. RB3/PGM RB3 PGM 24 21 I/O I TTL Digital I/O. Low-voltage (single-supply) ICSP programming enable pin. RB4 25 22 I/O TTL Digital I/O. RB5 26 23 I/O TTL Digital I/O. RB6/PGC RB6 PGC 27 24 I/O I TTL/ST(2) Digital I/O. In-circuit debugger and ICSP programming clock. RB7/PGD RB7 PGD 28 25 I/O I/O TTL/ST(2) Digital I/O. In-circuit debugger and ICSP programming data. PORTC is a bidirectional I/O port. RC0/T1OSO/T1CKI RC0 T1OSO T1CKI 11 8 I/O O I ST Digital I/O. Timer1 oscillator output. Timer1 external clock input. RC1/T1OSI/CCP2 RC1 T1OSI CCP2 12 9 I/O I I/O ST Digital I/O. Timer1 oscillator input. Capture2 input, Compare2 output, PWM2 output. RC2/CCP1 RC2 CCP1 13 10 I/O I/O ST Digital I/O. Capture1 input, Compare1 output, PWM1 output. RC3/SCK/SCL RC3 SCK SCL 14 11 I/O I/O I/O ST Digital I/O. Synchronous serial clock input/output for SPI mode. Synchronous serial clock input/output for I2C mode. RC4/SDI/SDA RC4 SDI SDA 15 12 I/O I I/O ST Digital I/O. SPI data in. I2C data I/O. RC5/SDO RC5 SDO 16 13 I/O O ST Digital I/O. SPI data out. RC6/TX/CK RC6 TX CK 17 14 I/O O I/O ST Digital I/O. USART asynchronous transmit. USART1 synchronous clock. RC7/RX/DT RC7 RX DT 18 15 I/O I I/O ST Digital I/O. USART asynchronous receive. USART synchronous data. VSS 8, 19 5, 6 P — Ground reference for logic and I/O pins. VDD 20 17 P — Positive supply for logic and I/O pins. TABLE 1-2: PIC16F873A/876A PINOUT DESCRIPTION (CONTINUED) Pin Name PDIP, SOIC, SSOP Pin# QFN Pin# I/O/P Type Buffer Type Description 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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