
2003 Microchip Technology Inc.
Preliminary
DS40300C-page 33
PIC16F62X
TABLE 5-1:
PORTA FUNCTIONS
Name
Functio
n
Input
Type
Output
Type
Description
RA0/AN0
RA0
ST
CMOS
Bi-directional I/O port
AN0
AN
—
Analog comparator input
RA1/AN1
RA1
ST
CMOS
Bi-directional I/O port
AN1
AN
—
Analog comparator input
RA2/AN2/V
REF
RA2
ST
CMOS
Bi-directional I/O port
AN2
AN
—
Analog comparator input
V
REF
—AN
V
REF output
RA3/AN3/CMP1
RA3
ST
CMOS
Bi-directional I/O port
AN3
AN
—
Analog comparator input
CMP1
—
CMOS
Comparator 1 output
RA4/T0CKI/CMP2
RA4
ST
OD
Bi-directional I/O port
T0CKI
ST
—
External clock input for TMR0 or comparator output. Output
is open drain type
CMP2
—
OD
Comparator 2 output
RA5/MCLR/V
PP
RA5
ST
—
Input port
MCLR
ST
—
Master clear
V
PP
HV
—
Programming voltage input. When configured as MCLR,
this pin is an active low RESET to the device. Voltage on
MCLR/V
PP must not exceed VDD during normal device
operation
RA6/OSC2/CLKOUT
RA6
ST
CMOS
Bi-directional I/O port.
OSC2
XTAL
—
Oscillator crystal output. Connects to crystal resonator in
Crystal Oscillator mode.
CLKOUT
—
CMOS
In ER/INTRC mode, OSC2 pin can output CLKOUT, which
has 1/4 the frequency of OSC1
RA7/OSC1/CLKIN
RA7
ST
CMOS
Bi-directional I/O port
OSC1
XTAL
—
Oscillator crystal input
CLKIN
ST
—
External clock source input. ER biasing pin.
Legend:
ST = Schmitt Trigger input
HV = High Voltage
OD = Open Drain
AN = Analog