Datasheet

 2010-2012 Microchip Technology Inc. DS39977F-page 33
PIC18F66K80 FAMILY
TABLE 1-6: PIC18F6XK80 PINOUT I/O DESCRIPTIONS
Pin Name
Pin
Num
Pin
Type
Buffer
Type
Description
MCLR
/RE3 28
MCLR
I ST Master Clear (input) or programming voltage (input). This pin is an
active-low Reset to the device.
RE3 I ST General purpose, input only pin.
OSC1/CLKIN/RA7 46
OSC1 I ST Oscillator crystal input.
CLKIN I CMOS External clock source input. Always associated with pin function,
OSC1. (See related OSC1/CLKI, OSC2/CLKO pins.)
RA7 I/O ST/
CMOS
General purpose I/O pin.
OSC2/CLKOUT/RA6 47
OSC2 O — Oscillator crystal output. Connects to crystal or resonator in Crystal
Oscillator mode.
CLKOUT O — In certain oscillator modes, OSC2 pin outputs CLKO, which has 1/4
the frequency of OSC1 and denotes the instruction cycle rate.
RA6 I/O ST/
CMOS
General purpose I/O pin.
Legend: I
2
C™ = I
2
C/SMBus input buffer CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels Analog = Analog input
I = Input O = Output
P= Power