User manual

PIC18F87J72 Evaluation Board User’s Guide

2.1.1 PIC18F87J72 Evaluation Board Jumper Settings

Table 2-2 shows the various jumpers available on the PIC18F87J72 Evaluation Board.

By connecting the jumper pins appropriately, different configurations can be achieved

on the board. Care must be taken regarding the voltage level before placing these

jumpers. Further sections in this document describe what precautions need to be

ensured while connecting these jumpers.

TABLE 2-1: BOARD LAYOUT AND COMPONENTS

Section or Component Functionality

1 PIC18F87J72 microcontroller Main controller for all functions on the board

2 Seven segment LCD To display time and other configuration features like OSR,

Gain, Bit Width

3 High voltage section with connectors For connecting universal input voltage to the board (when not

using 9V supply or battery)

4 RJ11 connector For debugging and programming purpose

5 Load Cell connector Optional provision to connect an external load cell output to the

ADC input channels

6PICtail

™

connector To connect to other application-specific daughter cards

7 Touch sensitive keys Touch sense switches for changing configuration of

Sigma-Delta ADC

8 9V battery connector To connect a 9V battery when powering the board through it

9 MCP2200 – USB to UART serial converter To communicate with the GUI

10 Mini B USB receptacle To connect the USB port of the computer to the evaluation

board

11 9V power supply jack 9V power supply to the board

12 32.768 kHz crystal Clock to the internal Real-Time Clock and Calendar (RTCC)

13 10 MHz crystal External Clock to the main controller

TABLE 2-2: JUMPERS ON THE EVALUATION BOARD

SI NO Device Description

1 JP1 Selection between high voltage and low voltage input on channel CH0

2 JP2 To ground Pin 1 of J4

3 JP3 Used for burden connections when CT output is connected to J4

4 JP4 To ground Pin 3 of J4

5 JP5 To ground Pin 1 of J5

6 JP6 Used for burden connections when CT output is connected to J5

7 JP7 To ground Pin 3 of J5

8 JP8 Selection between high voltage and low voltage input on channel CH1