PIC16F946-ESLASHMLQTP datasheet(58/330 Pages) MICROCHIP

58 / 330 page

PIC16F913/914/916/917/946

DS41250F-page 56

3.4.3

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 LCD or interrupts, refer to the appropriate

section in this data sheet.

3.4.3.1

RB0/INT/SEG0

Figure 3-9 shows the diagram for this pin. The RB0 pin

is configurable to function as one of the following:

• a general purpose I/O

• an external edge triggered interrupt

• an analog output for the LCD

3.4.3.2

RB1/SEG1

Figure 3-9 shows the diagram for this pin. The RB1 pin

is configurable to function as one of the following:

• a general purpose I/O

• an analog output for the LCD

3.4.3.3

RB2/SEG2

Figure 3-9 shows the diagram for this pin. The RB2 pin

is configurable to function as one of the following:

• a general purpose I/O

• an analog output for the LCD

3.4.3.4

RB3/SEG3

Figure 3-9 shows the diagram for this pin. The RB3 pin

is configurable to function as one of the following:

• a general purpose I/O

• an analog output for the LCD

FIGURE 3-9:

BLOCK DIAGRAM OF RB<3:0>

Data Latch

TRIS Latch

RD TRISB

RD PORTB

TTL

Input Buffer

SE<3:0> and LCDEN

Data Bus

WR PORTB

WR TRISB

VDD

I/O Pin

Weak

Pull-up

SE<3:0>

SEG<3:0>

INT(1)

RBPU

Note 1: RB0 only.

SE<3:0> and LCDEN

VDD

VSS

WPUB<3:0>

Schmitt Trigger

SE0 and LCDEN

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