PIC16F946 Datasheet, PDF (45/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
3.3.3.6 RB5/COM1
Figure 3-11 shows the diagram for this pin. The
RB5/COM1 pin is configurable to function as one of the
following:
• a general purpose I/O
• an analog output for the LCD
FIGURE 3-11:
BLOCK DIAGRAM OF RB5/COM1
RBPU⁽¹⁾
Data Bus
WR PORTB
WR TRISB
LCDEN and LMUX<1:0> ≠ 00
D
Q
CK
Data Latch
D
Q
CK
TRIS Latch
RD TRISB
LCDEN and LMUX<1:0> ≠ 00
TTL
Input Buffer
VDD
P
Weak
Pull-up
VDD
I/O Pin
Set RBIF
RD PORTB
From other
RB<7:4> pins
LCDEN and
LMUX<1:0> ≠ 00
Q
D
EN
Q
D
EN
FOSC/4
RD PORTB
COM1
LCDEN and LMUX<1:0> ≠ 00
Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit.
© 2005 Microchip Technology Inc.
Preliminary
DS41265A-page 43