Datasheet

PIC18F8722 FAMILY
DS39646C-page 22 © 2008 Microchip Technology Inc.
PORTA is a bidirectional I/O port.
RA0/AN0
RA0
AN0
30
I/O
I
TTL
Analog
Digital I/O.
Analog input 0.
RA1/AN1
RA1
AN1
29
I/O
I
TTL
Analog
Digital I/O.
Analog input 1.
RA2/AN2/V
REF-
RA2
AN2
V
REF-
28
I/O
I
I
TTL
Analog
Analog
Digital I/O.
Analog input 2.
A/D reference voltage (low) input.
RA3/AN3/V
REF+
RA3
AN3
V
REF+
27
I/O
I
I
TTL
Analog
Analog
Digital I/O.
Analog input 3.
A/D reference voltage (high) input.
RA4/T0CKI
RA4
T0CKI
34
I/O
I
ST/OD
ST
Digital I/O. Open-drain when configured as output.
Timer0 external clock input.
RA5/AN4/HLVDIN
RA5
AN4
HLVDIN
33
I/O
I
I
TTL
Analog
Analog
Digital I/O.
Analog input 4.
High/Low-Voltage Detect input.
RA6 See the OSC2/CLKO/RA6 pin.
RA7 See the OSC1/CLKI/RA7 pin.
TABLE 1-4: PIC18F8527/8622/8627/8722 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
TQFP
Legend: TTL = TTL compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog= Analog input
I = Input O = Output
P= Power I
2
C™/SMB = I
2
C/SMBus input buffer
Note 1: Alternate assignment for ECCP2 when Configuration bit, CCP2MX, is cleared (all operating modes except
Microcontroller mode).
2: Default assignment for ECCP2 in all operating modes (CCP2MX is set).
3: Alternate assignment for ECCP2 when CCP2MX is cleared (Microcontroller mode only).
4: Default assignment for P1B/P1C/P3B/P3C (ECCPMX is set).
5: Alternate assignment for P1B/P1C/P3B/P3C (ECCPMX is clear).