Datasheet

PIC18F46J11 FAMILY
DS39932D-page 22  2011 Microchip Technology Inc.
TABLE 1-4: PIC18F4XJ11 PINOUT I/O DESCRIPTIONS
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
44-
QFN
44-
TQFP
MCLR
18 18 I ST Master Clear (Reset) input; this is an active-low
Reset to the device.
OSC1/CLKI/RA7
OSC1
CLKI
RA7
(1)
32 30
I
I
I/O
ST
CMOS
TTL
Oscillator crystal or external clock input.
Oscillator crystal input or external clock source
input. ST buffer when configured in RC mode;
otherwise CMOS. Main oscillator input
connection.
External clock source input; always associated
with pin function OSC1 (see related OSC1/CLKI
pins).
Digital I/O.
OSC2/CLKO/RA6
OSC2
CLKO
RA6
(1)
33 31
O
O
I/O
—
—
TTL
Oscillator crystal or clock output
Oscillator crystal output. Connects to crystal or
resonator in Crystal Oscillator mode.
Main oscillator feedback output connection
in RC mode, OSC2 pin outputs CLKO, which
has 1/4 the frequency of OSC1 and denotes
the instruction cycle rate.
Digital I/O.
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 OD = Open-Drain (no P diode to V
DD)
DIG = Digital output
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.