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PIC16F720-E/SS データシート(PDF) 59 Page - Microchip Technology |
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PIC16F720-E/SS データシート(HTML) 59 Page - Microchip Technology |
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59 / 244 page  2010 Microchip Technology Inc. DS41430A-page 59 PIC16F/LF720/721 6.2.4 PIN DESCRIPTIONS AND DIAGRAMS Each PORTB pin is multiplexed with other functions. The pins and their combined functions are briefly described here. For specific information about individual functions such as the SSP, I2C™ or interrupts, refer to the appropriate section in this data sheet. 6.2.4.1 RB4/AN10/SDI/SDA Figure 6-7 shows the diagram for this pin. The RB4 pin is configurable to function as one of the following: • General purpose I/O. Individually controlled interrupt-on-change. Individually enabled pull-up. • Analog input for the A/D • Synchronous Serial Port Input (SPI) •I2C data I/O 6.2.4.2 RB5/AN11/RX/DT Figure 6-8 shows the diagram for this pin. The RB5 pin is configurable to function as one of the following: • General purpose I/O. Individually controlled interrupt-on-change. Individually enabled pull-up. • Analog input for the A/D • USART asynchronous receive • USART synchronous receive 6.2.4.3 RB6/SCK/SCL Figure 6-9 shows the diagram for this pin. The RB6 pin is configurable to function as one of the following: • General purpose I/O. Individually controlled interrupt-on-change. Individually enabled pull-up. • Synchronous Serial Port clock for both SPI and I2C 6.2.4.4 RB7/TX/CK Figure 6-10 shows the diagram for this pin. The RB7 pin is configurable to function as one of the following: • General purpose I/O. Individually controlled interrupt-on-change. Individually enabled pull-up. • USART asynchronous transmit • USART synchronous clock FIGURE 6-7: BLOCK DIAGRAM OF RB4 I/O Pin VDD VSS D Q CK Q D Q CK Q D Q CK Q D Q CK Q VDD D EN Q D EN Q Weak Data Bus WR WPUB RD WPUB RD PORTB RD PORTB WR PORTB WR TRISB RD TRISB WR IOCB RD IOCB Interrupt-on- To SSP Analog(1) Input mode RABPU Analog(1) Input mode Change Q3 To A/D Converter ST SSPEN 0 1 1 0 Note 1: ANSEL determines Analog Input mode. 0 1 1 0 SSP From SSP |
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