Microchip Technology DV164136 User Manual

Getting Started

DS51721B-page 19

2.5

CONNECTING TO HOST PC FOR RS-232 COMMUNICATION

As shown in Figure 2-9, there are two ways to connect a PC to the PICDEM PIC18
Explorer Demonstration Board.

• Via the USB Port

• Via the DB9 Pin (RS-232 Port)

FIGURE 2-9:

BOARD TO PC CONNECTION

2.5.1

PC Connection Via DB9 Pin

To connect the PICDEM PIC18 Explorer Demonstration Board to a host PC via the
nine-pin DB9 connector, set jumper J13, as shown in the first illustration in Figure 2-10.

This routes the main microcontroller’s communications through a transceiver.

FIGURE 2-10:

JUMPER J13 – SETTINGS FOR RS-232 OR USB

Host

Board

USB

DB9

PIC18LF2450

Microcontroller

J13

Main

PIC

MCU

UART Transceiver

Connecting to

Nine-Pin RS-232 Port

Connecting to

USB Port

J13