PIC16F946 Datasheet, PDF (32/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
3.1.1.2 RA1/AN1/C2-/SEG7
Figure 3-2 shows the diagram for this pin. The
RA1/AN1/C2-/SEG7 pin is configurable to function as
one of the following:
• a general purpose I/O
• an analog input for the A/D
• an analog input for Comparator 2
• an analog output for the LCD
FIGURE 3-2:
BLOCK DIAGRAM OF RA1/AN1/C2-/SEG7
Data Bus
WR PORTA
WR TRISA
D
Q
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
RD TRISA
VDD
I/O Pin
SE7 and LCDEN
Analog Input or
SE7 and LCDEN
TTL
Input Buffer
RD PORTA
SEG7
SE7 and LCDEN
To A/D Converter or Comparator
DS41265A-page 30
Preliminary
© 2005 Microchip Technology Inc.