SOFTWARE AND HARDWARE SOLUTIONS FOR THE EMBEDDED …

EasyPIC

ICD

4

S O F T W A R E A N D H A R D W A R E S O L U T I O N S F O R T H E E M B E D D E D W O R L D

MikroElektronikaDevelopment tools - Books - Compilers

Software and Hardwaresolutions for Embedded World

With useful implemented peripherals, plentiful practical

code examples and a broad set of additional add-on

boards (Serial Ethernet, Compact Flash, MMC/SD,

ADC, DAC, CAN, RTC, RS-485, etc.), MikroElektronika

development boards make fast and reliable tools that

can satisfy the needs of experienced engineers and

beginners alike.

EasyPIC4User’s Manual

3 in1

ICDmik

ro

IN-CIRCUITDEBUGGER

ICDmik

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IN-CIRCUITDEBUGGER

MICROCHIP

DEVELOPMENT

BOARD

MICROCHIP

DEVELOPMENT

BOARD

PICPIC

USB 2.0

IN-CIRCUITPROGRAMMER

USB 2.0


EasyPIC4 User’s Manual

M I K R O E L E K T R O N I K A S O F T W A R E A N D H A R D W A R E S O L U T I O N S F O R T H E E M B E D D E D W O R L D

22page

MikroElektronikaDevelopment tools

EasyPIC

ICD

4

No part of this manual, including the product and software described in it, may be

reproduced, transmitted, transcribed, stored in a retrieval system, or translated into

any language in any form or by any means, except documentation kept buy the pur-

chaser for backup purposes, without the express written permission of

MikroElektronika company.

Product warranty or service will not be extended if the product is repaired, modified

or altered, unless such repair, modification or alteration is authorized in writing by

MikroElektronika.

MIKROELEKTRONIKA PROVIDE THIS MANUAL “AS IS” WITHOUT WARRANTY

OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED

TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR

FITNESS FOR A PARTICULAR PUROSE.

IN NO EVENT SHALL MIKROELEKTRONIKA, ITS DIRECTORS, OFFICERS,

EMPLOYEES OR DISTRIBUTORS BE LIABLE FOR ANY INDIRECT, SPECIAL,

INCIDENTAL, OR CONSEQUENTIAL DAMAGES(INCLUDING DAMAGES FOR

LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUP-

TION OF BUSINESS AND THE LIKE) EVEN IF MIKROELEKTRONIKA HAS BEEN

ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY

DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.

SPECIFICATION AND INFORMATION CONTAINED IN THIS MANUAL ARE FUR-

NISHED FOR INTERNATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT

ANY TIME WITHOUT NOTICE, AND SHOULD BE CONSTRUED AS A COMMIT-

MENT BY MIKROELEKTRONIKA

MikroElektronika assumes no responsibility or liability for any errors or inaccuracies

that may appear in this manual, including the product and software described in it.

Product and corporate names appearing in this manual may or may not be regis-

tered trademarks or copyrights of their respective companies, and are used only for

identification or explanation and to the owners benefit, without intent to infringe.

First edition

September 2006



33page


EasyPIC

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CONNECTING THE SYSTEM page 4

INTRODUCTION page 5

Power Supply page 10

On-board USB 2.0 programmer page 11

Jumpers page 7

Switches page 6

MCU sockets page 8

LEDs page 16

Pushbutton switches page 18

PS/2 keyboard page 28

7-segment displays page 21

Graphic LCD page 22

LCD 2x16 in 4-bit mode page 23

LCD 2x16 in 8-bit mode page 24

A-D Converter input page 30

CONTENTS

DESCRIPTION OF THE DEVELOPMENT SYSTEM page 5

USB Communication page 27

Direct Port Access page 32

RS-232 Communication page 26

DS1820 Digital Thermometer page 29

mikroICD (In-Circuit Debugger) page 15

Oscillator page 13


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The development system box contains the development system, product CD, USB

cable, RS232 cable and this manual.

The first thing to do is to take the system out of the box. Unpack the USB cable and

connect it to the PC. Please use USB ports on the back of the PC with direct con-

nection to the motherboard.

Install the PICFLASH2 programmer and drivers. Start the installation from the

product CD: CD_Drive:/product/zip/PICFlash2_setup.exe.

After the installation connect the USB cable to the EasyPIC4 board.

Run and use PICFLASH2 as explained in the document ‘PICflash2 programmer’.

After these 4 steps, your EasyPIC4 is installed and ready for use. You should try to

read a program from the chip or to load an example from the examples folder of

mikroElektronika’s compilers for PIC or from the product CD:

CD_Drive:/product/zip/easypic4_examples.zip.

CONNECTING THE SYSTEM

Step no.1

Step no.2

Step no.3

Step no.4



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EasyPIC

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The EasyPIC4 development system is a full-featured development board for

Microchip PIC microcontrollers. It has been designed to allow students and engi-

neers to easily exercise and explore the capabilities of PIC microcontrollers. It

allows PIC microcontrollers to be interfaced with external circuits and a broad range

of peripheral devices, allowing a user to concentrate on software development.

Figure 1 illustrates the development board. Each component is marked on a

silkscreen, both top and bottom. These marks describe connections to the microcon-

troller, operation modes, and provide some useful notes. The need for additional

schematics is minimized since all relevant information is printed on the board.

IINNTT

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INTRODUCTION

Figure 1. EasyPIC4 development board

MICROCHIP

DEVELOPMENT

BOARD

MICROCHIP

DEVELOPMENT

BOARD

PICPIC


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EasyPIC

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SWITCHES

The EasyPIC4 development board features a number of peripherial devices. In

order to enable these devices before programming, you need to check if appropri-

ate jumpers or switches have been properly set.

Switches are devices that have two positions - ON and OFF, which have a role to

establish or break a connection between two contacts. The EasyPIC4 development

board has two groups of switches.

The first group, SW1, enables connections between the microcontroller port with

analog capabilities (PORTA) and external pull-up/down resistors. The pull-up/down

resistors should be disconnected from the analog input pins, otherwise they will

affect the input voltage level. When PORTA pins are used as digital inputs/outputs,

the appropriate pull-up/down resistors should be enabled.

The upper four switches of SW2 are used to enable LEDs connected to PORTA/E,

PORTB, PORTC and PORTD. For example, if the switch for PORTB is OFF, all

PORTB LEDs will be turned off.

The lower four switches of SW2 are used to enable the 7-segment displays. If you

don’t need the 7-segment displays in your project, these switches should be OFF.

Switch is ON

Switch is OFF

1 ON

43

25

87

6

Figure 2.

Group of 8 switches

Switch 1 is ON, and other

switches are OFF



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Jumpers, like switches, can break or establish a connection between two points.

Beneath the plastic cover of the jumper is a metal contact, which makes a connec-

tion if the jumper is placed between two disconnected pins.

For example, the jumper group JP10 have two jumpers used as switches. They are

used to connect or disconnect PS/2 CLK pin to RC1 and PS/2 DATA pin to RC0 pin

of the microcontroller. A connection is made when the jumpers are placed between

two contacts.

More often jumpers are used as a selector between two possible connections by

using a three pin connector. As illustrated in Fig. 4, the middle contact can be con-

nected to the left or right pin, depending on the jumper’s position.

Left lineis selected

All lines aredisconnected

Right lineis selected

Jumper is ON

Jumper is OFF

Figure 3.

Figure 4.

Jumper as a

switch

Jumper as a

multiplexer

JUMPERS


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EasyPIC

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4

EasyPIC4 is delivered with a 40-pin microcontroller. Users can remove this one and

fit a different microcontroller in DIP40, DIP28, DIP20, DIP18, DIP14 or DIP8

packages of an adequate pinout.

MCU SOCKETS

Note: Since all packages have parallel connections, there must not be more than one

microcontroller on the board at a time.

Figure 5.MCU sockets

Note: Make sure to place jumper JP18 in lower position (labeled as VCC) while

using PIC18F2331 microcontroller. When using some other 28-pin MCU this

jumper must be at upper position (labeled as RA5).

Note: There are two DIP18 sockets, with different pinouts (DIP18A and DIP18B).

When putting 18-pin microcontoller into DIP18 socket choose the one with corre-

sponding pinout. For example, PIC16F628A uses DIP18A socket, while

PIC18F1220 uses DIP18B socket. The 10F MCU socket is used only for PIC10F

family and the DIP8 socket is used for all other 8-pin microcontrollers.



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DIP

40

RA0

RA1

RA2

RA3

RA4

RA5

RE0

RE1

RE2

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

VDD

VSS

MCLR

VDD

VSS

RA4

RA4RA4

RA4

PortA

DIP28

vcc

vcc

vcc

RA4 RA4GP4

(RA4)

DIP18 DIP14

DIP8

1

1

ON

ON

8

87 7

6

6

5

5

4

4

3

3

2

2

PORTA/EPORTA/GP

RA4

JP17

SW2

SW

1

Microcontroller’s pins are routed to various peripherals as illustrated in Fig. 6. All

ports have direct connections to Direct Port Access connectors. Such connectors are

typically used for connecting external peripherals to the board or for providing use-

ful points for connecting digital logic probe.

All ports are connected to LEDs, push-button switches and pull-up/down resistors,

which allow easy monitoring and testing of digital pin state .

Some pins are connected to other peripherials such as the DS1820 temperature sen-

sor, RS-232 communication, 7-segment displays, LCD, etc.

System connectionFigure 6.

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EasyPIC

ICD

4

As a power supply source, users can select either a regulated supply from the USB

cable (default) or an external power supply. In case of the USB power supply, the

system should be connected to a PC using the USB programming cable, while the

jumper JP1 should be set in the right-hand position.

In the case of an external power supply, the EasyPIC4 board produces +5V using

an LM7805 voltage regulator. The external power supply can be AC or DC, with a

voltage between 8V and 16V and the jumper JP1 should be set in the left-hand posi-

tion. In Fig. 7 you can see USB and external power supply connectors.

GND

Vin Vout

VCC

CN1 8-12V (AC/DC)

+

E1470uF

C8100nF

E2470uF

C15100nF

1

2

VCC

D-

D+

GND

5V 5V

USB

FP1

1

2

3

USB yPower Suppl

External Power Supply

EXT

EXT

USB

USB

REG17805

E3470uF

JP1

POWER SUPPLY

JP1 in the left-hand

position: system will

take power from the

external AC/DC

power adapter.

JP1 in the right-hand

position: system will

take power from the

USB cable.

USB and power supply connectorsFigure 7.

Figure 8. Power supply select jumper

Figure 9. JP1 is set to USB power supply

EXT USB

USB

connector

USB

connector

External power

supply connector

POWER SUPPLY

SELECTABLE

POWER SUPPLY

SELECTABLE



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ON-BOARD USB 2.0 PROGRAMMER

Figure 10.

Figure 11.

USB 2.0 programmer

JP5 jumpers explanation

There is no need for the use of

external equipment during pro-

gramming as EasyPIC4 develop-

ment system has its own on-board

USB programmer. All you need

to do is connect the system to a

PC using USB cable. Then, load

your program into the microcon-

troller via the PICFlash2 pro-

gramming software which is sup-

plied with EasyPIC4.

On the right of the USB programmer there is the JP5 jumpers group. These jumpers

are used for PGM pin selection. There are two different programming modes for PIC

MCUs: Low-Voltage and High-Voltage programming mode. PICflash2 supports

only High-Voltage programming mode which can be applied regardless of MCU’s

programming state. Since some PIC MCUs are being shipped whith Low-Voltage

programming mode as default, you must select a proper PGM pin (depending on

chip). For most of the MCUs you don’t have to use PGM selection and the JP5

jumpers group should stay in the Default position.

Default position

RB5 used as PGM RB4 used as PGM

RB3 used as PGM

Note: There is no need for reseting MCU after programming. The programmer will

reset the MCU automatically.

USB 2.0


USB 2.0



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Figure 14.

JP2 jumperexplanation

Jumper JP2 allows using the MCLR pin as RESET or as digital I/O. It can be RE3,

RA5 or RA3 pin depending on MCU that you are using.

When JP2 is in the lower position the hardware reset (pressing reset button) is

enabled and MCLR pin can not be used as an I/O pin.

When JP2 is in the upper position the MCLR pin can be used as an I/O pin but the

hardware reset is disabled.

MCLR pinused as I/O

MCLR pinused as RESET

When using DIP40, DIP28, DIP18A and DIP18B sockets, jumpers JP3 and JP4

should be in the upper position (default) as shown in Fig. 12.

For DIP20, DIP14 and DIP8 sockets, these jumpers should be in the lower position

(Fig. 13).

Figure 12.

Figure 13.

JP3 and JP4 for DIP40,DIP28, DIP18A and DIP18B

JP3 and JP4 for DIP20,DIP14 and DIP8



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OORROSCILLATOR

Since there are so many sockets on EasyPIC4 board, there are two oscillators that

are connected with two main sections of the MCU sockets. The first oscillator is

labeled as OSC1 and is connected to DIP40, DIP28, DIP18A and DIP18B socket.

The second oscillator is labeled as OSC2 and is connected to DIP20, DIP14 and

DIP8 socket.

Figure 15.JP2 jumper explanation

Note: As you can see from the picture above, 10F MCU socket is not connected to

any of the two oscillators. This MCUs have only an internal oscillator and they can’t

be used with an external crystal.


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For some microcontrollers oscillator input pins can also be used as digital input/out-

put pins. In order to implement this feature EasyPIC4 has jumpers for connecting

MCU either to oscillator or to digital I/O pins. You can see the schematics for OSC1

oscillator on Fig. 16.

EasyPIC

ICD

4

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

RA7/OSC1

RA6/OSC2

MCLR

VDD

VSS

vcc

X18MHz

C622pF

C722pF

RA7 RA6

JP13

RA6 and RA7 pins areused as oscillator input

RA6 and RA7 pins areused as digital I/O

Figure 16.

Oscillator connection with MCU

Note: If the used DIP’s oscillator pins are labeled with OSC1 then the oscillator

should be placed in the OSC1 connector. If the used DIP’s oscillator pins are labeled

with OSC2 then the oscillator should be placed in the OSC2 connector.

OOSS

CCIILL

LLAATT

OORR



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mmiikk

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DD ((

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))mikroICD (Real-Time Hardware In-Circuit Debugger)

mikroICD is highly effective tool for Real-Time debugging on hardware level.

mikroICD debugger enables you to execute a program on a PIC microcontroller and

view variable values, Special Function Registers (SFR) and EEPROM as the pro-

gram is running.

Start Debugger [F9]

Run/ Pause Debugger [F6]

Toggle Breakpoints [F5]

Run to cursor [F4]

Step Into [F7]

Step Over [F8]

Flush RAM [F2]

Stop Debugger [Ctrl+F2]

Figure 17. On-Board USB programmerwith mikroICD

ICDmik

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IN-CIRCUITDEBUGGER

ICDmik

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IN-CIRCUITDEBUGGER

You can use mikroICD within any of MikroElektronika’s compilers for PIC

(mikroC, mikroBasic or mikroPascal). All you have to do is to select appropriate

build type (Release or ICD Debug), build the project, program the MCU, select

appropriate debugger (mikroICD Debugger) and you are ready to go.

Note: For more information on how to use mikroICD debugger please refer to the

mikroICD documentation: “mikroICD User’s Manual”. You can also find it within

the Help documentation inside any of the mentioned compilers.

mikroICD debugger uses on-board programmer to communicate with the compiler

and it supports common debugger commands:


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EasyPIC

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Light Emitting Diodes (LEDs) are the most commonly used components, usually for

displaying pin’s digital state. EasyPIC4 has 36 LEDs that are connected to the

microcontroller’s PORTA, PORTB, PORTC, PORTD and PORTE.

LEDs

Figure 18. Light Emitting Diodes

Each group of eight LEDs can be enabled or disabled using the switch SW2. The

exception is PORTE which has 4 LEDs and is connected to the same switch as

PORTA.

Fig. 19. illustrates the connection of a LEDs to PORTB of the microcontroller. A

resistor is used in series with the LED to limit the LED's current. In this case the

resistor's value is 1K.



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LLEEDD

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The LEDs are enabled when the corresponding switch on SW2 is on. When enabled,

LEDs will display the state of the corresponding microcontroller pin; otherwise the

LEDs will always be off, no matter what the port state is, as no current can flow

through LED.

RN7

R-SIL 8/9

1

2

3

4

5

6

7

89

RB0

RB1

RB2

RB3

RB4

RB5

RB6

RB7

1 ON

43

25

87

6

PORTD LED

PORTC LED

PORTB LED

PORTA/E LED

VCC

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

CURRENT FLOW

X18MHz

C622pF

C722pF

Figure 19.LED schematics

PICflashOn-Board USBprogrammer

R1

71

0K

Res

et

VCC

C1

41

00

n

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

VCC

X18MHz

C622pF

C722pF


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EasyPIC

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EasyPIC4 has 36 push buttons, which can

be used to change states of digital inputs

to microcontroller's ports. There is also

one switch that acts as a RESET. Reset

switch schematic is shown in Figure 21.

PUSHBUTTON SWITCHES

Figure 22.

Pushbutton switches

Figure 20.Reset switch

Figure 21.

Reset switch schematic

VCC

RA0

RA1

RA2

RA3

RA4

RA5

RA6

RA7

RB0

RB1

RB2

RB3

RB4

RB5

RB6

RB7

RC0

RC1

RC2

RC3

RC4

RC5

RC6

RC7

RD0 RE0

RD1 RE1

RD2 RE2

RD3 RE3

RD4

RD5

RD6

RD7

PORTA PORTB PORTC PORTD PORTE

VCC

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

0V while buttonis pressed

+5V while buttonis pressed

X18MHz

C622pF

C722pF

JP17



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Figure 23.

Buttons schematics

Buttons connections to PORTA, PORTB, PORTC, PORTD and PORTE are shown

in Fig. 23. Jumper JP17 determines whether a button press will bring logical zero or

logical one to the appropriate pin.

When button is not pressed, pin state is determined by the pull-up or pull-down port

jumpers.

In the example shown in Fig. 23, JP17 is connected to +5V, therefore pressing the

buttons will bring logical one to the appropriate pins.


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EasyPIC

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On Fig. 24 the JP21 switch is

set to pull-up, therefore when

the button is not pressed,

pull-up resistor pulls the

microcontroller’s RB4 pin to

+5V.

A button press causes the

port pin to be connected to

ground (JP17 is in the lower

position).

Thus, only when the button is

pressed the microcontroller

will sense a logical zero; oth-

erwise the pin state will

always be logical one.

On Fig. 25 the JP21 switch is

set to pull-down, therefore

when the button is not

pressed, pull-down resistor

pulls the microcontroller’s

RB4 pin to 0V.

A button press causes the

port pin to be connected to

+5V (JP17 is in the higher

position).

Thus, only when the button is

pressed the microcontroller

will sense a logical one; oth-

erwise the pin state will

always be logical zero.

RB4

PortBpull-up

0V while pressed

vcc

DIP

40

RA0

RA1

RA2

RA3

RA4

RA5

RE0

RE1

RE2

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

VDD

VSS

MCLR

VDD

VSS

vcc

JP21

JP17

RB4

PortBpull-down

5V while pressed

vcc

DIP

40

RA0

RA1

RA2

RA3

RA4

RA5

RE0

RE1

RE2

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

VDD

VSS

MCLR

VDD

VSS

vcc

JP21

JP17

Figure 24.

Figure 25.

Button with pull-up resistor

Button with pull-down resistor



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7-SEGMENT DISPLAYS

EasyPIC4 has four 7-segment displays in multiplex mode. Data lines are connected

to PORTD, while each display is enabled through the lower four bits of PORTA.

dp

R10

10K

Q1

d

e

f

a

g

dp

c

b

Q4Q3Q2

10K 10K 10K

R11 R12 R13

VCC

8.8.

a

b

c

d

e

f

g

PORTA/E LEDs ON

PORTB LEDs ON

PORTC LEDs ON

PORTD LEDs ON

DIS3

DIS3 DIS2 DIS1 DIS0

RA3

DIS2RA2

DIS1RA1

DIS0RA0

1 ON

87

65

43

2

SW2

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS R9 - R2

8.8.

1 2 3 4 5

10 9 8 7 6

8.8.

1 2 3 4 5

10 9 8 7 6

8.8.

1 2 3 4 5

10 9 8 7 6

8.8.

1 2 3 4 5

10 9 8 7 6

X18MHz

C622pF

C722pF

Figure 26.

7-segment displays

Figure 27.7-segment displays schematics

8.8.8.8.

7

S

E

G

7

S

E

G

READY

READY


2222page



tools

EasyPIC

ICD

4

In order to enable GLCD,

jumper JP12 should be set

to the right-hand position,

labeled as GRAPH.

GRAPHIC LCD

A graphic LCD (GLCD) allows advanced visual messages to be displayed. While a

character LCD can display only alphanumeric characters, a GLCD can be used to

display messages in the form of drawings and bitmaps. The most commonly used

graphic LCD has the screen resolution of 128x64 pixels. Before a GLCD is con-

nected, the user needs to set the jumper JP12 (Fig. 28) to the right-hand position.

The GLCD’s contrast can be adjusted using the potentiometer P3, which is placed

to the right of the GLCD.

P3 10K

Vee

VoContrastAdjustment

JP12

GRAPH.CHAR.

D0

D1 D2

D3

D4

D5

D6

D7

CS1

CS2

RS

R/W

E

RST

VCC

VCC

VCC

D5

D4

D3

D2

D1

D0E

R/WR

S

LE

D-

Vo

LE

D+

VC

C

Ve

e

GN

D

RS

T

CS

2

D7

CS

1

D6

1 20

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

LCD8 contrastselected

GLCD and LCD8contrast not selected

GLCD contrastselected

X18MHz

C622pF

C722pF

R28 2E2

VCC

Figure 30.

GLCD schematics

Figure 28.

Figure 29.

GLCDselectionjumper

GLCD

GGRR

AAPP

HHIICC

LLCC

DD 11

2288XX

6644

GRAPHIC LCD

CONNECTOR

ON-BOARD

GRAPHIC LCD

CONNECTOR

ON-BOARD



2233page


EasyPIC

ICD

4

LLCCDD

22XX

1166 II

NN 44

--BBIITT

MMOO

DDEEA standard character LCD is probably the most widely used data visualization com-

ponent. Usually, it can display two lines of 16 alphanumeric characters, each made

up of 5x8 pixels. The character LCD communicates with the microcontroller via a

4-bit or 8-bit data bus, each requiring the use of a different connector on EasyPIC4.

For 4-bit data bus use, the LCD should be placed in the upper left of the board, just

above the LEDs. The connection to the microcontroller is shown in Fig. 32 where

there are only four data lines. It is important to note that the LCD should be placed

or removed from EasyPIC4 only when the power is off.

LCD 2X16 IN 4-BIT MODE

D7

D6

D5

D4

D3

D2

D1

D0E

R/WR

S

VE

E

VC

C

GN

D

P410K

ContrastAdjustment

VCC

1 14

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

VCC

X18MHz

C622pF

C722pF

LCD Display

4-bit mode

Figure 31.

Figure 32.

LCD 2x16 in 4-bit mode

LCD 2x16 in 4-bitmode schematics

2x16 LCD2x16 LCD

2x16 LCDCONNECTOR2x16 LCDCONNECTOR

ON-BOARDON-BOARD


2244page



tools

The LCD must be placed in the marked position with two free pins to the left and

four free pins to the right. It is important to note that the LCD should be placed or

removed from EasyPIC4 only when the power is off. Before attaching the LCD, set

jumper JP12 to the left position. The LCD's contrast can be adjusted using poten-

tiometer P3 which is located to the right of the GLCD/LCD connector.

EasyPIC

ICD

4

LLCCDD

22XX

1166 II

NN 88

--BBIITT

MMOO

DDEE LCD 2X16 IN 8-BIT MODE

When using a character LCD in 8-bit mode, the connector that is shared with the

GLCD should be used. Since this connector has 20 pins and the character LCD has

only 14 pins, special attention is required when placing the LCD. Otherwise the

LCD can be permanently damaged.

Figure 33.

LCD 2x16 in 8-bit mode

NOTE: Special attention is required when placing the LCD. Otherwise the LCD can

be permanently damaged.

View from the back:shows which pinsstays disconnected.

2x16 LCD2x16 LCD

2x16 LCDCONNECTOR2x16 LCDCONNECTOR

ON-BOARDON-BOARD



2255page


EasyPIC

ICD

4

LLCCDD

22XX

1166 II

NN 88

--BBIITT

MMOO

DDEE

P3 10K

Vee

VoContrastAdjustment

JP12

GRAPH.CHAR.

D0

D1 D2

D3

D4

D5

D6

D7

RS

R/W

E

VCC

VCC

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

LCD8 contrastselected

GLCD and LCD8contrast not selected

GLCD contrastselected

X18MHz

C622pF

C722pF

VCC

D7

D6

D5

D4

D3

D2

D1

D0E

R/WR

S

VE

E

VC

C

GN

D

1 14

LCD Display

8-bit mode

Figure 34. LCD 8-bit mode schematics

Leave two freepins to the left side

Leave four free pinsto the right side

In order to enable LCD,

jumper JP12 should be set

to the left position, labeled

as CHAR.


2266page



tools

EasyPIC

ICD

4

RRSS

--223322

CCOO

MMMM

UUNN

IICCAA

TTIIOO

NN

RS-232 communication enables point-to-point data transfer. It is commonly used in

data acquisition applications for the transfer of data between microcontroller and a

PC. Since the voltage levels of a microcontroller and PC are not directly compati-

ble with those of RS-232, a level transition buffer, such as the MAX232, must be

used. In order to provide a more flexible system, the microcontroller is connected

to the MAX232 through the two jumper

groups: JP7 and JP8. The jumper group JP7

is used to connect the Rx line to RC7, RB2 or

RB1. The jumper group JP8 is used to connect

the Tx line to RC6, RB5 or RB2. Note that

JP7 and JP8 must not be connected to RB2 at

the same time. JP6 enables the connections of

RB0 pin to CTS and RC2 pin to RTS line for

implementing hardware handshaking.

RS-232 COMMUNICATION

VCC

VCC

1

1

6

6

9

9

5

5

C1+ VCC

V+ GND

C1- T1out

C2+ R1in

C2- R1out

V- T1in

T2out T2in

R2in R2out

MAX232

Serial Cable

Rx

Tx

Tx

Rx

RC6

RB5

RB2

RC2RTS

RB2

RC7

RB1

RB0CTS

E910uF

E810uF

E1010uF

E1110uF

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

X18MHz

C622pF

C722pF

RTS

CTS

JP8

JP7

JP6

Figure 35.

Figure 36.

Connection betweenmicrocontroller

and a PC

RS232 connector



2277page


EasyPIC

ICD

4

UUSS

BB CC

OOMM

MMUU

NNIICC

AATT

IIOONN

The USB communication connector is placed in the upper right corner of the

EasyPIC4. It is used with specific PIC microcontrollers that have USB support, such

as PIC18F2450 or PIC18F4550. Note that the USB communication connector can-

not be used for programming and that the USB

programming connector cannot be used for

communication. In order to enable connection

between the microcontroller and USB commu-

nication connector, the JP9 jumpers group

should be set to the right position. As the result,

microcontroller pins RC3, RC4 and RC5 are dis-

connected from the rest of the system and con-

nected to the USB communication connector.

USB COMMUNICATION

RC4-U

RC4

RC5-U

RC5

RC3-U

100n100n

RC3

VCC

JP9 JP9

RC3-U, RC4-U, RC5-U areavailable to other peripherials

RC3-U, RC4-U , RC5-U areconnected onl to USBy

VCC

VCC

D+ D-

USB

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

X18MHz

C622pF

C722pF

JP9

Figure 37.

Figure 38.

USB communica-tion schematics

USB communication connectorTo enable USB

communication all

three jumpers have

to be set to the right

side.


2288page



tools

EasyPIC

ICD

4

PPSS

//22 CC

OOMM

MMUU

NNIICC

AATT

IIOONN

The PS/2 connector allows direct con-

nection between EasyPIC4 and

devices that use PS/2 communication,

such as PC, keyboard or mouse. For

example, the microcontroller can be

connected to a keyboard to capture

pressed keys or it can be connected to

a PC to act as a keyboard. CLK and

DATA lines are used for data tansfer.

In this case, they are connected to pins

RC1 and RC0 respectively.

PS/2 COMMUNICATION

+5V

DATANC

NC CLK

VCC

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

X18MHz

C622pF

C722pF

R3710K

DATANCGNDVCCCLKNC

PS2CONNECTOR

VCC

R3810K

JP10

VCC VCC

Figure 41.

Figure 39.

PS/2 connector

PS/2 communication schematics

Figure 40.

Keyboard connected todevelopment board

PS/2 READY

DEVELOPMENTDEVELOPMENT

PS/2 READY



2299page


EasyPIC

ICD

4

DDSS

11882200

DDIIGG

IITTAA

LL TT

HHEE

RRMM

OOMM

EETT

EERR

DS1820 digital thermometer is well suited to

environmental temperature measurement,

having the temperature range of -55C to 125C

and the accuracy of +/-0.5C. It must be placed

correctly in the 3-pin socket provided on

EasyPIC4, with its rounded side to the right,

as marked on the board (see Fig. 42) other-

wise the DS1820 could be permanently dam-

aged. DS1820’s data pin can be connected to

either RA5 or RE2 pin, which is determined

by jumper JP11.

JP11

DS1820

VCC

R110K

GND

DQ

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

DQ line isconnected to RE2

DQ line isconnected to RA5

DQ line isconnecteddis

-55 C

125 C

VCC

X18MHz

C622pF

C722pF

VCC

VCC

There is a mark inthe form of half-cir-cle for proper ori-entation of DS1820sensor.

DS1820 DIGITAL THERMOMETER

Figure 42.

Figure 43.

DS1820

DS1820 Schematics


3300page



tools

EasyPIC

ICD

4

AANN

AALLOO

GG TT

OO DD

IIGGIITT

AALL

CCOO

NNVV

EERR

TTEE

RR II

NNPP

UUTT

A-D CONVERTER INPUT

Figure 44.

A-D Converter input

EasyPIC4 development board has two potentiometers for working with Analog to

Digital Converter (ADC). Both potentiometers outputs are in the range of 0V to 5V.

Two analog signals can be connected on two different analog input pins at the same

time. The jumpers group JP15 enables connection between potentiometer P1 and

one of the following pins: RA0, RA1, RA2, RA3 or RA4. The jumpers group JP16

enables connection between potentiometer P2 and one of the following pins: RA1,

RA2, RA3, RA4 or RA5.

In order to measure analog signal without interference, turn the coresponding switch

on SW1 to OFF position. This will disable connection of the used PORTA pin to the

pull-up/down resistors.

Applications of A-D Conversion are various. Microcontroller takes analog signal

from its input pin and translates it into a digital value. Basically, you can measure

any analog signal that fits in range acceptable by PIC. That range is 0V to 5V.

ADC INPUT

ENABLED

ADC INPUT

ENABLED



3311page


EasyPIC

ICD

4

AANN

AALLOO

GG TT

OO DD

IIGGIITT

AALL

CCOO

NNVV

EERR

TTEE

RR II

NNPP

UUTT

vcc vcc

P110K

P210K

0 - 5V

0 - 5V 0 - 5V

JP15 JP16

PortA

vcc

pull-up/down

1

ON

8765432

SW

1

PIC

xxxx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

RA

0

RA

1

RA

2

RA

3

RA

4

RA

5

vcc

X18MHz

C622pF

C722pF

Figure 45.

A-D Converter inputschematics Pull-up/down resistors on

PORTA analog input pins

should be disabled using

SW1

NOTE: Jumpers JP15 and JP16 should not select the same pin.

Potentiometer P1 is con-

nected to RA2 pin and

potentiometer P2 is con-

nected to RA3 pin.


3322page



tools

EasyPIC

ICD

4

These connectors can be used for system expansion with external boards such as

Serial Ethernet, Compact Flash, MMC/SD, ADC, DAC, CAN, RTC, RS-485, etc.

Ensure that the on-board peripherals are disconnected from microcontroller by set-

ting the appropriate jumpers, while external peripherals are using the same pins. The

connectors can also be used for attaching logic probes or other test equipment.

DDIIRR

EECC

TT PP

OORR

TT AA

CCCC

EESS

SS

All microcontroller input/output pins can be accessed via connectors placed along

the right side of the board. For each of PORTA, PORTB, PORTC, PORTD and

PORTE there is one 10-pin connector providing VCC, GND and up to eight port

pins.

DIRECT PORT ACCESS

Figure 46.Direct port access connectors

Figure 47.

Example of how to connectexternal peripheral with flatcable



3333page


EasyPIC

ICD

4

DDIIRR

EECC

TT PP

OORR

TT AA

CCCC

EESS

SS

RB4

RB6

RB0

RB2

RB5

RB7

RB1

RB3

HEADER 5x2

CN9

RB6

RB7

RB4

RB5

RB2

RB3

RB0

RB1

8

9

6

7

4

5

2

3

1

2

3

1JP21

Pull-up line isconnected

All linesare disconnected

Pull-down lineis connected

RN2

RPACK8/98x10K

VCC

PIC

xx

xx

RA0

RA1

RA2

RA3

RC0

RC1

RA4

RA5

RE0

RE1

RE2

RC3

RD0

RD1

RC4

RD3

RD2

RC5

RC6

RC7

RD4

RD5

RD6

RD7

RB0

RB1

RB2

RB3

RB4

RB5

RB7

RB6

RC2

VDD

VSS

OSC1

OSC2

MCLR

VDD

VSS

VCC

VCC

X18MHz

C622pF

C722pF

Figure 48.

PORTB connection


3344page



tools

EasyPIC

ICD

4

If you are experiencing problems with any

of our products or you just want additional

information, please let us know. We are

committed to meeting your every need.

Technical Support :

[email protected]

If you have any other question, comment

or a business proposal, please contact us:

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