PIC16F684-I/SLG Microchip, PIC16F684-I/SLG Datasheet - Page 38

• Manufacturer Part Number: PIC16F684-I/SLG
• Description: pic, flash, Microcontrollers, Microprocessors, Semiconductors and Actives, ic, mcu
• Manufacturer: Microchip

PIC16F684
4.2.4
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.
4.2.4.1
Figure 4-2 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
• an analog input to the comparator
• In-Circuit Serial Programming data
• an analog input for the Ultra Low-power Wake-up
4.2.4.2
Figure 4-2 shows the diagram for this pin. The RA1 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 to the comparator
• a voltage reference input for the A/D
• In-Circuit Serial Programming clock
DS41202C-page 36
PIN DESCRIPTIONS AND
DIAGRAMS
RA0/AN0/C1IN+/ICSPDAT/ULPWU
RA1/AN1/C1IN-/V
REF
/ICSPCLK
Preliminary
FIGURE 4-2:
Data Bus
PORTA
PORTA
WPUA
WPUA
TRISA
TRISA
IOCA
IOCA
Interrupt-on-
Note 1:
WR
WR
WR
WR
RD
RD
RD
RD
Change
D
D
D
D
CK
CK
CK
CK
To Comparator
To A/D Converter
Comparator mode and ANSEL determines Analog
Input mode.
Q
Q
Q
Q
Q
Q
Q
Q
Input Mode
BLOCK DIAGRAM OF RA1
Analog
RD PORTA
 2004 Microchip Technology Inc.
Input Mode
(1)
RAPU
Analog
Q
Q
(1)
EN
EN
D
D
V
DD
Weak
V
V
DD
Q3
SS
I/O PIN