PIC16F913/914/916/917/946
3.4.3
PIN DESCRIPTIONS AND
DIAGRAMS
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:
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.
• 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:
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 analog output for the LCD
• a general purpose I/O
• an external edge triggered interrupt
• 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>
SE<3:0>
VDD
WPUB<3:0>
VDD
VSS
Weak
Pull-up
RBPU
P
Data Bus
D
Q
I/O Pin
WR PORTB
CK
Data Latch
D
Q
WR TRISB
CK
TRIS Latch
SE<3:0> and LCDEN
TTL
Input Buffer
RD TRISB
RD PORTB
SEG<3:0>
SE<3:0> and LCDEN
Schmitt Trigger
INT(1)
SE0 and LCDEN
Note 1: RB0 only.
DS41250F-page 56
© 2007 Microchip Technology Inc.
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