PIC18F44J50-I Datasheet, PDF (22/562 Pages) Microchip Technology – 28/44-Pin, Low-Power, High-Performance USB Microcontrollers

PIC18F46J50 FAMILY
TABLE 1-4: PIC18F4XJ50 PINOUT I/O DESCRIPTIONS
Pin Name
Pin Number
Pin Buffer
44- 44- _{Type Type}
QFN TQFP
Description
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
Oscillator crystal or external clock input.
I
ST
Oscillator crystal input or external clock source
input. ST buffer when configured in RC mode;
otherwise CMOS. Main oscillator input
connection.
I CMOS External clock source input; always associated
with pin function, OSC1 (see related OSC1/CLKI
pins).
I/O TTL
Digital I/O.
OSC2/CLKO/RA6
OSC2
CLKO
RA6⁽¹⁾
33 31
Oscillator crystal or clock output.
O—
Oscillator crystal output. Connects to crystal or
resonator in Crystal Oscillator mode.
O—
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.
I/O TTL
Digital I/O.
Legend:
TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
I = Input
P = Power
DIG = Digital output
CMOS
Analog
O
OD
I²C™
= CMOS compatible input or output
= Analog input
= Output
= Open-Drain (no P diode to VDD)
= Open-Drain, I²C-specific
Note 1: RA7 and RA6 will be disabled if OSC1 and OSC2 are used for the clock function.
DS39931D-page 22
 2011 Microchip Technology Inc.