The EPIC Plus or Serial Programmer may be used for in-system programming of serial programmable PICmicro MCUs through the 10-pin expansion header J3. Vpp, RB6, RB7 and ground should be connected as in the following diagram. Any additional connections to /MCLR, RB6 and RB7 should be designed as to not interfere with in-circuit programming. The drawing shows the pinouts and connections to the 18-pin PIC16F84. For other PICmicro MCUs, use their corresponding pin connections.

Note: +5 volts should be supplied to the PICmicro MCU by the target system. The +5 volt and Vdd lines from the programmer header are not intended to power external circuits.

Note for PIC16F62x

PORTB, pin 4 should be connected to ground to prevent interference from the Low Voltage Programming pin.

Note for PIC16F87x

PORTB, pin 3 should be connected to ground to prevent interference from the Low Voltage Programming pin.

Note for PIC18Fxxx(x)

PORTB, pin 5 should be connected to ground to prevent interference from the Low Voltage Programming pin.

Note for PIC17C7xx

These devices may also be programmed in-circuit. However, different pins are required than shown above. See the Microchip programming spec on these devices for more information.