| Pin |
Symbol |
Description |
| 1 |
RA2 |
Bi-directional I/O port |
| 2 |
RA3 |
Bi-directional I/O port |
| 3 |
RA4/T0CKI |
Bi-directional I/O port |
| 4 |
MCLR
|
Master Clear (Reset) input/programming voltage input. This pin is an active low RESET to the device. |
| 5 |
GND |
Ground reference for logic and I/O pins. |
| 6 |
RB0/INT |
External interrupt |
| 7 |
RB1 |
Bi-directional I/O port |
| 8 |
RB2 |
Bi-directional I/O port |
| 9 |
RB3 |
Bi-directional I/O port |
| 10 |
RB4 |
Interrupt-on-change pin. |
| 11 |
RB5 |
Interrupt-on-change pin. |
| 12 |
RB6 |
Interrupt-on-change pin, Serial programming clock |
| 13 |
RB7 |
Interrupt-on-change pin, Serial programming data. |
| 14 |
Vcc |
Positive supply for logic and I/O pins. |
| 15 |
OSC2/CLKIN |
Oscillator crystal output. Connects to crystal or resonator in Crystal Oscillator mode. In RC mode, OSC2 pin outputs CLKOUT, which has 1/4 the frequency of OSC1 and denotes the instruction cycle rate. |
| 16 |
OSC1/CLKOUT |
Oscillator crystal input/external clock source input |
| 17 |
RA0 |
Bi-directional I/O port |
| 18 |
RA1 |
Bi-directional I/O port |