PIC16F690-ESLASHML datasheet(73/306 Pages) MICROCHIP

73 / 306 page

DS41262E-page 71

PIC16F631/677/685/687/689/690

4.4.3

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.

4.4.3.1

RB4/AN10/SDI/SDA

Figure 4-7 shows the diagram for this pin. The

RB4/AN10/SDI/SDA(1) pin is configurable to function

as one of the following:

• a general purpose I/O

• an analog input for the ADC (except PIC16F631)

• a SPI data I/O

•an I2C data I/O

FIGURE 4-7:

BLOCK DIAGRAM OF RB4

Note 1: SDI

and

SDA

are

available

PIC16F677/PIC16F687/PIC16F689/PIC

16F690 only.

I/O Pin

VDD

VSS

VDD

Weak

Data Bus

WPUB

RD PORTB

PORTB

TRISB

IOCB

Interrupt-on-

To SSPSR

Analog(1)

Input Mode

RABPU

Analog(1)

Input Mode

Change

To A/D Converter(2)

SSPEN

Available on PIC16F677/PIC16F687/PIC16F689/PIC16F690

only.

Note

ANSEL determines Analog Input mode.

Not implemented on PIC16F631.

SSPSR

From

SSP

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