mikroElektronika dsPICPRO3 User manual

SOFTWARE AND HARDWARE SOLUTIONS FOR THE EMBEDDED WORLD
MikroElektronika
Development tools - Books - Compilers
Software and Hardware
solutions for Embedded World
dsPICPRO3
User’s Manual
With useful implemented peripherals, many practical
code examples and a broad set of add-on boards (Serial
Ethernet, Compact Flash, MMC/SD, ADC, DAC, CAN,
RTC, RS-485, etc.), MikroElektronika development
boards make fast and reliable tool which can satisfy
needs of experienced engineers and beginners alike.
3in 1
MICROCHIP
DEVELOPMENT
BOARD
MICROCHIP
DEVELOPMENT
BOARD
dsPICdsPIC
SUPPORTED
SUPPORTED
Serial
Ethernet
Serial
Ethernet
USB 2.0
IN-CIRCUIT
PROGRAMMER
USB 2.0
IN-CIRCUIT
PROGRAMMER

1. External power supply from 8 to 16 V AC/DC;
2. Choose between external and USB power
supply. You don’t need external supply if you
powering from PC’s USB port;
3. Very fast and flexible on-board USB program
mer with mikroICD (In-Circuit Debugger). Its
key feature is the ability to support new MCUs
just by downloading a new Software;
4. You can connect LCD if you need it for your
application in 4-bit mode;
5. Two RS232 communication ports: RS232A
and RS232B;
6. For the purpose of presentation all PORTB
high pins are connected to potentiometers P3
and P4 and can be used to measure voltages
set by these potentiometers;
7. PC keyboard connector;
8. Serial Ethernet on board;
9. If jumper is set to the upper position the pins
of appropriate port are set to logical one
(pull-up). If jumper is set to the lower postion, the pins are set to
logical zero (pull-down). It is very important to select pull-up for
port if you expect logical zero on its inputs and vice versa;
10. All switches on SW1 and switch one on SW2 are used to turn
LEDs connected to all MCU ports ON or OF;
11. Switches 2 and 3 on SW2 are used to enable LCD and GLCD
backlight, switch 4 to enable temperature sensor, switch 5 to
enable RTC and switch 6 to enable MMC-CS line. Switches 7
and 8 are used to enable Serial Ethernet INT and WOL lines;
12. The first two switches on SW3 are used to enable CS and RST
lines of Serial Ethernet. Switches 3, 4, 5 and 6 are used to
enable CAN1 and CAN2 communication modules. Switches 7 and
8 are used to enable DAC converter;
13. The first three switches on SW4 are used to enable RS485 com-
munication module, switches 4, 5 and 6 to enable SPI communi-
cation and switches 7 and 8 to enable I2C connector’s SDA and
SCL lines;
14. 4.096V voltage reference is used for working with A/D Converter;
15. DS1820 temperature sensor enables you to measure temperature
with 0.5 °C accuracy;
16. You can connect Graphic LCD if you need it for your applica-
tion or LCD in 8-bit mode;
17. MCU Card socket;
18. 67 buttons enable you to control every pin on your microcon-
troller;
19. See all the signals - each pin has a LED;
20. Reset circuit - if the reset button is pressed on the hardware reset
will happen (MCU will start executing from the beginning);
21. MMC/SD slot for multimedia cards with storage space up to 2GB;
22. CAN communication ports;
23. RS485 communication port;
24. DAC connector;
25. Real TIme Clock;
26. I2C connector;
27. You can choose how to affect pin by pressing button, high
state or low state.
Development board dimensions:
Width: 250 mm (9.84 Inches)
Height: 210 mm (8.27 Inches)
dsPICpro3
KEY FEATURES

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CCOONNTTEENNTTSS
CONNECTING THE SYSTEM page 4
INTRODUCTION page 5
Power Supply page 11
On-Board USB Programmer page 12
DS1820 Digital Thermometer page 13
Jumpers page 7
MCU Card Connector page 8
Switches page 6
LEDs page 14
Pushbutton Switches page 16
Graphic LCD page 18
RS-232 Communication page 20
LCD 2x16 in 4bit Mode page 19
A/D Converter Input page 23
CONTENTS
DESCRIPTION OF THE DEVELOPMENT SYSTEM page 5
Serial Ethernet On-Board page 30
PS2 Keyboard Connector page 25
Direct Port Access page 26
MMC/SD (Multimedia Card) page 28
Real Time Clock page 32
RS485 Communication page 35
D/A Converter output page 32
ICD2 Connector page 37
CAN Communication page 36

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CCOONNNNEECCTTIINNGGTTHHEESSYYSSTTEEMM
The development system box contains: development system, product CD, USB cable,
RS232 cable and this manual.
The first thing you should do is to take the system out of the box, unpack USB cable and
connect it to your PC. Please use USB ports at the back of the PC with direct connection to
the motherboard.
Install dsPICFLASH programmer and drivers. Start installation from the product CD:
CD_Drive:\product\zip\dsPICFlash_setup.exe.
After the installation connect USB cable to the dsPICPRO3 board. You’ll be asked for
dsPICFLASH drivers. Point to them in order to finish driver installation. They are placed
in the folder:
System_Drive:\Program Files\Mikroelektronika\dsPICFLASH\Driver.NT
Run and use dsPICFLASH as explained in the document ‘dsPICprog programmer by
MikroElektronika’:
CD_Drive:\product\pdf\dspicprog_manual.pdf.
After you have carried out instructions above, your dsPICPRO3 is installed and ready for
use. You can try to read some program from the chip or to load an example from the Exam-
ples folder of mikroElektronika’s compilers for dsPIC or from the Product CD:
CD_Drive:\product\zip\dspicpro3_examples.zip.
CONNECTING THE SYSTEM
Step no.1
Step no.2
Step no.3
Step no.4

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IINNTTRROODDUUCCTTIIOONN
INTRODUCTION
dsPICPRO3 development system is a full-featured development board for Microchip dsPIC
microcontrollers, designed to enable students and engineers to easily exercise and explore
the capabilities of dsPIC microcontrollers.It enables dsPIC microco ntrollers to be interfaced
with a broad range of peripheral devices, enabling user to concentrate on software develop-
ment.
Figure 1. illustrates the development board. On a silkscreen, there are identification marks
beside each component . These marks describe connections to microcontroller, operation
modes and provide other useful notes. Need for additional schematics is minimized as all
relevant information is on the board.
Figure 1.
dsPICPRO3 development board
MICROCHIP
DEVELOPMENT
BOARD
MICROCHIP
DEVELOPMENT
BOARD
dsPICdsPIC

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SSWWIITTCCHHEESS
SWITCHES
dsPICPRO3 development board features many peripherial devices. In order to enable these
devices before programming, you need to check if appropriate 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. dsPICPRO3 development system has four
groups of switches.
.
The first group, SW1, is used to enable LEDs connected to PORTA, PORTB low, PORTB
high, PORTC, PORTD low, PORTD high, PORTF, PORTG low and PORTG high. For
example, if switch 1 on SW1 is OFF then all PORTA LEDs will be turned off.
Switch 1 on SW2 turns LEDs on PORTG high ON or OFF. Switches 2 and 3 are used to
enable LCD and GLCD backlight, switch 4 to enable Digital Thermometar and switch 5 to
enable Real Time Clock Interrupt line. Switch 6 is used to enable MMC Chip Select line
and the last two switches on SW2 are used to enable Serial Ethernet.
The first two switches on SW3 are used to enable Serial Ethernet. Switches 3, 4, 5 and 6
are used to enable CAN Communication and the last two switches are used to enable D\A
Converter.
Switches 1, 2 and 3 on SW4 are used to enable RS485 Communication. Switches 4, 5 and
6 are used to enable SPI Communication and the last two switches are used to enable Real
Time Clock.
Figure 2. Group of 8 switches
1
ON
432 5876
Switches 1-6 are ON, and
other switches are OFF
Switch is ON
Switch is OFF

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JJUUMMPPEERRSS
JUMPERS
Jumpers, like switches, can establish or break a connection between two points. Under a
plastic cover of jumper is a metal contact which makes a connection when you place
jumper between two disconnected pins.
For example, jumper J13 is used to connect or disconnect RS232A Tx line to the RF3 MCU
pin.Connection is made when jumper is placed between two contacts.
Jumpers are more often used as selectors between two possible connections using three pin
connector. As illustrated in Fig. 4. the pin in the middle can be connected to the left or right
pin, depending on the jumper position.
Figure 3.
Figure 4.
Jumper as a
switch
Jumper as a
multiplexer
Jumper is ON
Jumper is OFF
Left line
is selected
All lines are
disconnected
Right line
is selected

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MMCCUUCCAARRDD
dsPICPRO3 development board has 80-pin MCU Card. If you want to use some other
microcontroller, all you have to do is to change MCU Cards. dsPICPRO3 MCU Card is
shown on the picture below:
MCU CARD
Figure 5. MCU Card

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MMCCUUCCAARRDD
You have to follow these steps in order to place your MCU Card properly in the
dsPICPRO3 MCU socket :
If MCU Card has been already placed
on dsPICPRO3, you have to remove it
by pulling it up slowly.
Place MCU Card on the board.
Note that the label on the MCU
Card must be placed in the upper-
left corner as it is drawn on the
dsPICPRO3 board.
When the MCU Card is properly
placed on the board, please, push it
down by putting pressure on all
edges at the same time.
Step no.1
Step no.2
Step no.3

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MMCCUUCCAARRDD
Microcontroller pins are routed to various peripherials as illustrated in Fig.6. All ports have
direct connections to the Direct Port Access connectors. Such connectors are tipically used to
connect external peripherials to the board, or to provide useful points for digital logic probes
connection.
All ports connected to LEDs, pushbutton switches and pull-up/down resistors enable users to
monitor and test digital pin state easily.
Some of the pins are connected to other peripherials: DS1820 temperature sensor, RS-232
communication, LCD etc.
RB8
1 ON
432
LED-RBH
SW1
5876
VCC
VCC
VCC
PORTB high
RB8 RB8
PORTB high
J3
J11
CN3
X1
10MHz
C1
22pF
C2
22pF
RG15
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
Vss
Vdd
RA12
RA13
RB5
RB4
RB3
RB2
RB1
RB0
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
Vss
OSC2
OSC1/CLKI
Vdd
RG2
RG3
RF6
RF7
RF8
RF2
RF3
RB6
RB7
RA9
RA10
AVdd
AVss
RB8
RB9
RB11
Vss
Vdd
RB12
RB13
RB14
RB15
RD14
RD15
RF4
RF5
RG13
RG12
RG14
RA7
RA6
RG0
RG1
RF1
Vdd
Vss
RD7
RD6
RD5
RD4
RD13
RD12
RD3
RD2
RD1
dsPIC30FXXXX
RF0
RB10
RA14
VCC
System connection
Figure 6.

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PPOOWWEERRSSUUPPPPLLYY
As a power supply source, user can select either a regulated supply from USB cable
(default) or an external non-regulated power supply.
In case of USB power supply, system should be connected to PC using USB programming
cable and jumper J10 should be set in the right-hand position.
In case of external power supply, dsPICPRO3 board produces +5V using LM7805 voltage
regulator. External power supply can be AC or DC, with voltage between 8V and 16 V and
jumper J10 should be set in the left-hand position. You can see power connectors:USB (left)
and external (right) in Fig.7 .
POWER SUPPLY
Figure 8. Power supply select jumper
GND
Vin Vout
VCC
CON2
DB1
B250C1500
+
E1
470uF
C11
100nF
E2
10uF
C3
100nF
1
2
VCC
D-
D+
GND
5V 5V
USB
FP1
1
2
3
External Power Supply
USB Power Supply
EXT
EXT
USB
USB
REG1
7805
J10
Figure 9. J10 is set to USB power supply
J10 in the left-hand
position: system will
take power from
external AC/DC
power adapter.
J10 in the right-hand
position: system will
take power from
USB cable.
USB and power supply connectors
Figure 7.
EXT USB
USB
connector
USB
connector
External power
supply connector
POWER SUPPLY
SELECTABLE
POWER SUPPLY
SELECTABLE

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OONN--BBOOAARRDDUUSSBB22..00PPRROOGGRRAAMMMMEERR
ON-BOARD USB 2.0 PROGRAMMER
There is no need to use external equipment during programming because dsPICPRO3
development system has its own on-board USB 2.0 programmer.
All you need to do is to connect the system to your PC using USB cable. Then, load your
program into the microcontroller via dsPICflash programming software which is supplied
with the board.
VCC
PROGRAM
R1 27
dsPICflash
On-Board USB
programmer
R2 27
1K
RSTbut
USBDP
USBDN
USBDN
RB0
RB1
PGC
PGD
RB1-PGC
RB0-PGD
MCLR
MULTIPLEXER
R5
VCC
D5
BAT43
10K
R13
10K
Reset
100n
VCC
X1
10MHz
C1
22pF
C2
22pF
RG15
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
Vss
Vdd
RA12
RA13
RB5
RB4
RB3
RB2
RB1
RB0
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
Vss
OSC2
OSC1/CLKI
Vdd
RG2
RG3
RF6
RF7
RF8
RF2
RF3
RB6
RB7
RA9
RA10
AVdd
AVss
RB8
RB9
RB11
Vss
Vdd
RB12
RB13
RB14
RB15
RD14
RD15
RF4
RF5
RG13
RG12
RG14
RA7
RA6
RG0
RG1
RF1
Vdd
Vss
RD7
RD6
RD5
RD4
RD13
RD12
RD3
RD2
RD1
dsPIC30FXXXX
RF0
RB10
RA14
VCC
RB1-PGC
RB0-PGD
TO PERIPHERALS ON
DEVELOPMENT BOARD
CN10
VCC GND
D- D+
USB
USB
Programmer
Connector
C1
100nF
VCC
R7
C8
FP1
F.BEAD
Figure 10. On-board USB programmer
Figure 11.
Switch schematic
Note: There is no need to reset MCU manually after programming.Programmer will reset
MCU automatically.
USB 2.0
IN-CIRCUIT
PROGRAMMER
USB 2.0
IN-CIRCUIT
PROGRAMMER

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DDSS11882200DDIIGGIITTAALLTTHHEERRMMOOMMEE--
DS1820 digital thermometer is used to measure environmen-
tal temperature, having the temperature range of -55°C to
125°C and the accuracy of +/-0.5°C. It must be placed correct-
ly in 3-pin socket provided on dsPICPRO3, with its rounded
side to the left, as marked on the board (Fig 11). Otherwise
DS1820 could be permanently damaged.Switch 4 on SW2
switch group is used to enable DS1820 by connecting it to
microcontroller RF6 pin .
X1
10MHz
C1
22pF
C2
22pF
VCC
RG15
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
Vss
Vdd
RA12
RA13
RB5
RB4
RB3
RB2
RB1
RB0
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
Vss
OSC2
OSC1/CLKI
Vdd
RG2
RG3
RF6
RF7
RF8
RF2
RF3
RB6
RB7
RA9
RA10
AVdd
AVss
RB8
RB9
RB11
Vss
Vdd
RB12
RB13
RB14
RB15
RD14
RD15
RF4
RF5
RG13
RG12
RG14
RA7
RA6
RG0
RG1
RF1
Vdd
Vss
RD7
RD6
RD5
RD4
RD13
RD12
RD3
RD2
RD1
dsPIC30FXXXX
RF0
RB10
RA14
1 ON
432 5876
RF6
RA12
RG9
SW2
RA15
RA14
DQ
GLCD BCK
LCD BCK
LED RGH
RTC INT
MMC CS
ETH WOL
ETH INT
VCC
VCCGND
DQ
VCC
VCC
-50 C
125 C
R1
10K
DS1820
There is a mark in the form of
half-circle for proper orientation
of DS1820 sensor.
DS1820 DIGITAL THERMOMETER
Figure 11.
Figure 12.
DS1820
DS1820 Schematic

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LLEEDDss
LEDs
Light Emitting Diodes (LEDs) are most commonly used components, usually for displaying
pins digital state. dsPICPRO3 has 67 LEDs connected to microcontroller’s ports- PORTA,
PORTB low, PORTB high, PORTC, PORTD low, PORTD high, PORTE low, PORTE high
and PORTF.
Figure 13. Light Emitting Diodes
Each group of LEDs can be enabled or disabled using switch group SW1 and swich 1 on
SW2, as shown in Fig. 13.
Fig. 14. illustrates connection between LEDs and PORTB of the microcontroller. Resistor
is used in series with LED in order to limit LED's current. The resistor's value in this case
is 1K.

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LLEEDDss
All LEDs from one port are connected to the common point through these resistors which
can be then connected or disconnected to ground by the corresponding switch on SW1. The
LEDs connected to ground are enabled and will display the state of the corresponding micro-
controller pin; otherwise the LEDs will always be off, no matter what the pin state is as no
current can flow through them.
RN11
8x1K
1
2
3
4
5
6
7
8
9
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
1 ON
432 5876
LED RC/RF
LED RBH
LED RBL
LED RA
VCC
RG15
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
Vss
Vdd
RA12
RA13
RB5
RB4
RB3
RB2
RB1
RB0
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
Vss
OSC2
OSC1/CLKI
Vdd
RG2
RG3
RF6
RF7
RF8
RF2
RF3
RB6
RB7
RA9
RA10
AVdd
AVss
RB8
RB9
RB11
Vss
Vdd
RB12
RB13
RB14
RB15
RD14
RD15
RF4
RF5
RG13
RG12
RG14
RA7
RA6
RG0
RG1
RF1
Vdd
Vss
RD7
RD6
RD5
RD4
RD13
RD12
RD3
RD2
RD1
dsPIC30FXXXX
RF0
RB10
RA14
LED RDL
LED RDH
SW1
LED RGL
LED RF
Figure 14. LED schematic

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PPUUSSHHBBUUTTTTOONNSSWWIITTCCHHEESS
PUSHBUTTON SWITCHES
X1
10MHz
C1
22pF
C2
22pF
RG15
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
Vss
Vdd
RA12
RA13
RB5
RB4
RB3
RB2
RB1
RB0
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
Vss
OSC2
OSC1/CLKI
Vdd
RG2
RG3
RF6
RF7
RF8
RF2
RF3
RB6
RB7
RA9
RA10
AVdd
AVss
RB8
RB9
RB11
Vss
Vdd
RB12
RB13
RB14
RB15
RD14
RD15
RF4
RF5
RG13
RG12
RG14
RA7
RA6
RG0
RG1
RF1
Vdd
Vss
RD7
RD6
RD5
RD4
RD13
RD12
RD3
RD2
RD1
dsPIC30FXXXX
RF0
RB10
RA14
VCC
RSTbut
10K
Reset
100n
VCC
R7
C8
dsPICflash
On-Board USB
programmer
RSTbut
Figure 15.
dsPICPRO3 has 67 push-buttons which can be used
to provide digital inputs to microcontroller ports.
There is also another pushbutton that acts as a
RESET button (Figure 15).
Reset button
Figure 16.
Reset button schematic
Figure 17. Pushbutton switches

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PPUUSSHHBBUUTTTTOONNSSWWIITTCCHHEESS
RD0
RD1
RD2
RD3
RD4
RD5
RD6
RD7
RD8
RD9
RD10
RD11
RD12
RD13
RD14
RD15
PORTD low PORTD high
+5V is connected
+5V and 0V
are disconnected
J11
VCC
VCC
RG15
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
Vss
Vdd
RA12
RA13
RB5
RB4
RB3
RB2
RB1
RB0
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
Vss
OSC2
OSC1/CLKI
Vdd
RG2
RG3
RF6
RF7
RF8
RF2
RF3
RB6
RB7
RA9
RA10
AVdd
AVss
RB8
RB9
RB11
Vss
Vdd
RB12
RB13
RB14
RB15
RD14
RD15
RF4
RF5
RG13
RG12
RG14
RA7
RA6
RG0
RG1
RF1
Vdd
Vss
RD7
RD6
RD5
RD4
RD13
RD12
RD3
RD2
RD1
dsPIC30FXXXX
RF0
RB10
RA14
0V is connected
Figure 18.
Buttons schematic
Example of button connection to PORTD low and PORTD high is shown in Fig.18. Jumper
J11 determines whether a button press will bring logical zero or logical one to the appropri-
ate pin.
When the button is not pressed, the pin state is determined by the pull-up or pull-down port
jumpers.
In the example shown in Fig.18, J11 is connected to +5V and a button press will bring log-
ical one to the appropriate pins.

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GGRRAAPPHHIICCLLCCDD112288XX6644
GRAPHIC LCD
GRAPHIC LCD
CONNECTOR
ON-BOARD
GRAPHIC LCD
CONNECTOR
ON-BOARD
Graphic LCD (GLCD) enables advanced visual messages to be displayed. While character
LCD can display only alphanumeric characters, GLCD can be used to display messages as
drawings and bitmaps. The most commonly used graphic LCD has a screen resolution of
128x64 pixels. GLCD contrast can be adjusted using potentiometer P2. GLCD backlight
can be turned off by turning switch 3 on SW2 OFF.
P2
5K
Vee
VCC
Vo
Contrast
Adjustment
VCC
D5
D4
D3
D2
D1
D0
E
R/W
RS
LED-
Vo
LED+
VCC
Vee
GND
RST
CS2
D7
CS1
D6
120
mikroElektronika
dsPICPRO3
Development system
RST
R/W
CS2
RS
D0
D1
RG15
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
Vss
Vdd
RA12
RA13
RB5
RB4
RB3
RB2
RB1
RB0
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
Vss
OSC2
OSC1/CLKI
Vdd
RG2
RG3
RF6
RF7
RF8
RF2
RF3
RB6
RB7
RA9
RA10
AVdd
AVss
RB8
RB9
RB11
Vss
Vdd
RB12
RB13
RB14
RB15
RD14
RD15
RF4
RF5
RG13
RG12
RG14
RA7
RA6
RG0
RG1
RF1
Vdd
Vss
RD7
RD6
RD5
RD4
RD13
RD12
RD3
RD2
RD1
dsPIC30FXXXX
RF0
RB10
RA14
D2
D3 D4 D5
E
CS1
D6
D7
RD5
RD4
RD3
RD2
RD1
RD0
RB6
RB5
RB4
RB7
RB3
RD7
RB2
RD6
1 ON
432 5876
RF6
RA12
RG9
SW2
RA15
RA14
DQ
GLCD BCK
LCD BCK
LED RGH
RTC INT
MMC CS
ETH WOL
ETH INT
VCC
R26
10
VCC
Figure 20. GLCD schematics
Figure 19. GLCD

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MikroElektronika
Development tools
LLCCDD22XX1166IINN44--BBIITTMMOODDEE
Standard character LCD is probably the most widely used data visualization
component.Normally, it can display two lines of 16 alphanumeric characters, each charac-
ter made of 5x8 pixels. Character LCD communicates with microcontroller via 4-bit data
bus. A connection to microcontroller is shown in Fig. 22 where there are only four data
lines. It is very important to turn the power off before you place or remove LCD from
dsPICPRO3.
LCD 2X16 IN 4-BIT MODE
P1
10K
Contrast
Adjustment
VCC
RS
RG15
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
Vss
Vdd
RA12
RA13
RB5
RB4
RB3
RB2
RB1
RB0
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
Vss
OSC2
OSC1/CLKI
Vdd
RG2
RG3
RF6
RF7
RF8
RF2
RF3
RB6
RB7
RA9
RA10
AVdd
AVss
RB8
RB9
RB11
Vss
Vdd
RB12
RB13
RB14
RB15
RD14
RD15
RF4
RF5
RG13
RG12
RG14
RA7
RA6
RG0
RG1
RF1
Vdd
Vss
RD7
RD6
RD5
RD4
RD13
RD12
RD3
RD2
RD1
dsPIC30FXXXX
RF0
RB10
RA14
D4
D5
E
D6
D7
1 ON
432 5876
RF6
RA12
RG9
SW2
RA15
RA14
DQ
GLCD BCK
LCD BCK
LED RGH
RTC INT
MMC CS
ETH WOL
ETH INT
VCC
R48
10
D7
D6
D5
D4
D3
D2
D1
D0
E
R/W
RS
VEE
VCC
GND
116
LCD4 Display
mikroElektronika
A
K
RD7
RD6
RD5
D4
RB6
RB4
A
K
RD4
VCC
Vee
Figure 21.
Figure 22.
LCD 2x16 in 4-bit mode
LCD 2x16 in 4-bit mode schematics
2x16 LCD
2x16 LCD
2x16 LCD
CONNECTOR
2x16 LCD
CONNECTOR
ON-BOARDON-BOARD

MIKROELEKTRONIKA SOFTWARE AND HARDWARE SOLUTIONS FOR THE EMBEDDED WORLD
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RRSS--223322CCOOMMMMUUNNIICCAATTIIOONN
RS-232 communication enables point-to-point data transfer. It is commonly used in data
acquisition applications for data transfer between microcontroller and PC. Since the volt-
age levels of microcontroller and PC are not directly compatible with each other, a level
transition buffer such as the MAX232 must be used.
RS-232 COMMUNICATION
Figure 23. RS232 connectors
dsPICPRO3 development board has two RS-232 communication devices, RS-232 A and RS-
232 B. Tx and Rx lines of RS232A are connected to MCU pins via jumpers J13 and J12. Tx
and Rx lines of RS232B are connected to MCU pins via jumpers J15 and J14.
ENABLEDENABLED
RS232RS232