PIC16F676 Microchip Technology Inc., PIC16F676 Datasheet - Page 24

• Manufacturer Part Number: PIC16F676
• Description: 14-pin, Flash-based 8-bit Cmos Microcontroller
• Manufacturer: Microchip Technology Inc.

PIC16F630/676
3.2.3
Each PORTA pin is multiplexed with other functions.
The pins and their combined functions are briefly
described here. For specific information about individ-
ual functions such as the comparator or the A/D, refer
to the appropriate section in this Data Sheet.
3.2.3.1
Figure 3-1 shows the diagram for this pin. The RA0 pin
is configurable to function as one of the following:
• a general purpose I/O
• an analog input for the A/D (PIC16F676 only)
• an analog input to the comparator
3.2.3.2
Figure 3-1 shows the diagram for this pin. The RA1 pin
is configurable to function as one of the following:
• as a general purpose I/O
• an analog input for the A/D (PIC16F676 only)
• an analog input to the comparator
• a voltage reference input for the A/D (PIC16F676
DS40039E-page 22
only)
PIN DESCRIPTIONS AND
DIAGRAMS
RA0/AN0/CIN+
RA1/AN1/CIN-/V
REF
FIGURE 3-1:
PORTA
PORTA
WPUA
WPUA
Data Bus
TRISA
TRISA
IOCA
IOCA
Interrupt-on-Change
WR
WR
WR
WR
RD
RD
RD
RD
D
D
D
D
To Comparator
To A/D Converter
CK
CK
CK
CK
Q
Q
Q
Q
Q
Q
Q
Q
Input Mode
BLOCK DIAGRAM OF RA0
AND RA1 PINS
RD PORTA
Analog
© 2007 Microchip Technology Inc.
Input Mode
RAPU
Analog
Q
Q
EN
EN
D
D
V
DD
Weak
V
V
DD
SS
I/O pin