Microchip Technology ADM00333 User Manual

DS51990A-page 12

© 2011 Microchip Technology Inc.

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.

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

6

PICtail

™

 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

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