PIC16F720-ESLASHML datasheet(59/244 Pages) MICROCHIP

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 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

VDD

Weak

Data Bus

WPUB

RD PORTB

PORTB

TRISB

IOCB

Interrupt-on-

To SSP

Analog(1)

Input mode

RABPU

Analog(1)

Input mode

Change

To A/D Converter

SSPEN

Note

ANSEL determines Analog Input mode.

SSP

From

SSP

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