mikroElektronika EasyAVR v7 User manual

USER'S GUIDE
EasyAVRv7
Supports 3.3V and 5V devices
Dual Power Supply
Easily add extra boards
mikroBUS™sockets
Four connectors for each port
Amazing Connectivity
microcontrollers supported
The ultimate AVR® board
As fast as it gets
USB 2.0 programmer
65

Making the best and the most comprehensive AVR® board in the world was our idea from the start. And this
is by no means an easy task. Driven by passion for excellence we never look at how hard the job is, but what
our users get when it's done. And EasyAVR® v7 brings a whole new perspective to AVR developers.
The 7th generation of the board brings many exciting new features. We hope that you will like it as much as
we do.
Use it wisely and have fun!
To our valued customers
Nebojsa Matic,
Owner and General Manager
of mikroElektronika

Table of contents
page 3
What’s Next? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What’s next
30
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
It's good to know . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction
04
05
mikroBUS™sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input/Output Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connectivity
16
18
Installing programmer drivers . . . . . . . . . . . . . . . . . . . . . .
Programming software . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On-board programmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming
12
13
10
Dual power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply
06
Supported microcontrollers . . . . . . . . . . . . . . . . . . . . . . . .
Supported MCUs
08
LCD 2x16 characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 digit7-seg display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GLCD 128x64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Touch panel controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displays
20
23
21
22
DS1820 - DigitalTemperature Sensor . . . . . . . . . . . . . .
I2C EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LM35 - Analog Temperature Sensor . . . . . . . . . . . . . . . .
Piezo Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADC inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional GNDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Modules
24
27
25
28
26
29
UART via RS-232 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UART via USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication
14
15

Introduction
introduction
page 4
EasyAVR™is your old friend. It has been here for you for several generations.
Today it has many users among students, hobbyists, enthusiasts and
professionals. We asked ourselves what else could be done to make such
a great board even greater. As a result some brilliant changes have been
made. We focused all of our creativity and knowledge on making a
revolutionary new design dierent from any previous version of the
board. We have gone through the process of ne tuning the board
performance, and used 4-layer PCB to achieve maximum eciency. We
now present you with the new version of EasyAVR - a powerful, well
organized board with on-board programmer - ready to be your strong
ally in development.
EasyAVR™development Team
EasyAVR™v7 is all about
connectivity. Having four
dierent connectors for
each port, you can connect
accessory boards, sensors and
your custom electronics easier
then ever before.
Powerful on-board mikroProg™
programmer can program about
65 AVR® microcontrollers
from Atmel®. You will need it,
whether you are a professional
or a beginner.
Four Connectors for each port Everything is already here
Amazing connectivity mikroProg™on board
EasyAVR™v7 is among few
development boards which
support both 3.3V and 5V
microcontrollers. This feature
greatly increases the number of
supported MCUs. It’s like having
two boards instead of one!
3.3V and 5V power supply
Dual Power Supply
Just plug in your Click™board,
and it’s ready to work. We
picked up a set of the most
useful pins you need for
development and made a
pinout standard you will
enjoy using.
For easier connections
mikroBUS™support
EasyAVRv7

It's good to know
Package contains
introduction
page 5
System Specication
ATmega32 is the default microcontroller!
power supply
7–12V AC or 9–15V DC
or via USB cable (5V DC)
board dimensions
266 x 220mm (10.47 x 8.66 inch)
weight
~438g (0.966 lbs)
power consumption
~80mA when all peripheral
modules are disconnected
Damage resistant
protective box
EasyAVR™v7 board in
antistatic bag
USB cable User Manuals and
Board schematic
DVD with examples
and documentation
1 2 3 4 5
Atmel® AVR® 8-bit ATmega32 in DIP is the default chip of
EasyAVR™v7. It has up to 16 MIPS operation, 32K bytes of
Flash program memory, 2K byte of internal SRAM memory
and 1K byte of EEPROM memory. It has 40-pin with 32
General purpose I/O pins, 10-bit Analog-to-Digital converter
with up to 8 channels (ADC), two 8-bit and one 16-bit
timers/counters (with separate prescalers, compare mode
and capture mode), four PWM channels, programmable serial
USART, Master/slave SPI and two-wire I2Cinterface, internal
calibrated 8 MHz RC and 32 KHz RTC oscillator. It also has
JTAG interface for programming/debugging.
- Great choice for both beginners
and professionals
- Rich with modules
- Enough RAM and Flash
- Comes with examples for
mikroC, mikroBasic and
mikroPascal compilers
We presentyou with a complete color schematics for EasyPIC™ v7 development board. We wanted
to make electronics more understandable, even for absolute beginners, so we provided photosof
most used SMD components,and made additional comments and drawings so you can get to know
what your board is consisted of, and how it actually works.
Copyright ©2012 Mikroelektronika.
Allrights reserved. MikroElektronika, MikroElektronika logo and o ther
MikroElektronika trademarksare the propertyof MikroElektronika .
Allo ther trademarksare the propertyof their respective owners.
Unauthorisedcopying, hiring, renting, public performance
and broadcasting of this DVD
is strictlyprohibited.
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PRODUCT DVD
www.mikroe.com
www.libstock.com
EasyAVRv7

Dual power supply
Board contains switching power supply
that creates stable voltage and
current levels necessary for
powering each part of the
board. Power supply section
contains two power regulators:
ST1S10, which generates
VCC-5V, and MC33269DT3.3 which
creates VCC-3.3V power supply. The board
can be powered in three dierent ways: with USB
power supply (CN1), using external adapters via adapter
connector (CN24) or additional screw terminals (CN25). External
adapter voltage levels must be in range of 9-15V DC or 7-12V AC. Use
jumper J22 to specify which power source you are using and jumper J5 to specify
whether you are using 5V or 3.3V power supply. Upon providing the power using either
external adapter or USB power source you can turn on power supply by using SWITCH 1 (Figure
3-1). Power LED (Green ON) will indicate the presence of power supply.
Figure 3-2: Dual power supply unit schematic
Figure 3-1: Dual power supply unit of EasyAVR™v7
C30 100nF C31 100nF C32 100nF
VCC-5V
POWER
R45
2K2
LD41
E11 220uF/35V/LESR
R54
100K
C28
1uF
L1 10uH
R56
20K
VCC-5V
J22
2 1 3
VCC-USB
D1
1N4007
D2
1N4007
D3
1N4007
D4
1N4007
CN24
CN25
R50
10K 1
2
3
54
6
7
8
GND
FB
INH
VINAPGND
SW
VINSW
SYNC
E
U5 ST1S10
C34
22uF
C35
22uF
C29
22uF
R51
4K7
J5
VCC-5V
VCC-BRD
VCC-3.3V
C27
100nF
VCC-5V
2
1
3
GND
Vout
Vin
REG1
MC33269DT3.3E8
10uF
3.3V VOLTAGE REGULATOR
VCC-3.3V
C26
100nF
E9
10uF
FP2
AVCC
VCC-BRD
AVCC
E6 10uF
5V SWITCHING POWER SUPPLY
VCC-USB
FP1
C3
100nF
1
2
3
4
VCC
GND
CN1
USB
SWITCH1
power supply
page 6 EasyAVRv7

How to power the board?
power supply
To power the board with USB cable, place jumper J22 in
USB position and place jumper J5 in 5V or 3.3V position.
You can then plug in the USB cable as shown on images
1and 2, and turn the power switch ON.
To power the board via adapter connector, place jumper
J22 in EXT position, and place jumper J5 in 5V or 3.3V
position. You can then plug in the adapter cable as shown
on images 3and 4, and turn the power switch ON.
To power the board using screw terminals, place jumper
J22 in EXT position, and place jumper J5 in 5V or 3.3V
position. You can then screw-on the cables in the screw
terminals as shown on images 5and 6, and turn the
power switch ON.
EasyAVR™v7 development board supports both
3.3V and 5V power supply on a single board.
This feature enables you to use wide range of
peripheral boards.
Set J22 jumper
to USB position
Set J22 jumper
to EXT position
1. With USB cable
3. With laboratory power supply
Set J22 jumper
to EXT position
2. Using adapter
1
3
5
2
4
6
page 7
Power supply: via DC connector or screw terminals
(7V to 12V AC or 9V to 15V DC),
or via USB cable (5V DC)
Power capacity: up to 500mA with USB, and up to 1500mA
with external power supply
EasyAVRv7

DIP40A
DIP40B
DIP28
DIP20A
DIP20B
DIP14
DIP8
C13
100nF
VCC-BRD
C14
100nF
VCC-BRD
C17
100nF
VCC-BRD
C15
100nF
VCC-BRD
C16
100nF
VCC-BRD
C18
100nF
VCC-BRD
C19
100nF
VCC-BRDVCC-BRD
E3
10uF
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PE0
CLK
PC0
PC1
PC2
PC3
PD0
PD1
PB4
PB3
PB2
PB1
PB0
PD7
PD6
PD5
PD4
PD3
PD2
PB4
PB3
PB2
PB1
PB0
PC7
PC6
PC5
PC4
PE1
PE2
PD0
PD1
PD6
PD5
PD4
PD3
PD2
CLK
PD0
PD1
PD7PD6
PD5
PD4
PD3
PD2
PB4
PB3
PB2
PB1
PB0 PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PC0
PC1
PC7
PC6
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
PB0
PC5
PC4
PC3
PC2
PC1
PC0
PB2
PB1
mRST
mRST
PB4
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB6
PB3
PB2
PA7
PA0
PA1
PA2
PA3
PB7
PB5
PA1
PB1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
SKT3
DIP SKT 40A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
SKT4
DIP SKT 40B
1
2
3
4 5
6
7
8
SKT7
DIP SKT 8
1
2
3
4
5
6
7 8
9
10
11
12
13
14
SKT1
DIP SKT 14
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
SKT2
DIP SKT 20A
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
SKT5
DIP SKT 20B
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28
SKT6
DIP SKT 28
RST_PC6
RST_PA2
RST_PB7
RST_PB3
RST_PB5
CLK_PB6
CLK_PA0
CLK_PB4
CLK_PB0
CLK_PB3
AREF_PC7
AVCCVCC-BRD
VCC-BRD
AVCC
VCC-BRD
VCC-BRD
VCC-BRD VCC-BRD
AVCC
VCC-BRD
E4
10uF
VCC-BRD
E5
10uF
PC2
PC3
PC4
PC5
SCK_PB7
MISO_PB6
SCK_PB7
MISO_PB6
SCK_MOSI_PB5
MOSI_PB3
MISO_PB4
SCK_PB7
MISO_PB6
SCK_PB2
MOSI_PB0
MISO_PB1
SCK_PB2
MOSI_PB0
MISO_PB1
SCK_PA4
MOSI_PA6 MISO_PA5
SCK_MOSI_PB5
SCK_MOSI_PB5
SCK_MOSI_PB5
J11
AREF_PC7
AVCC
PC7
DIP28
AREF SELECTION
98
U2D
56
U2CR28
1K
C9
22pF
C8
22pF
R23
1M
C7
100nF
1 2
U2A
3 4
U2B
11 10
U2E
13 12
U2F
CLK
VCC-BRD
X1
8MHz
EXTERNAL CLOCK
J13
CLK_PB6
PB6
J14
J15
J16
J17
CLK
CLK_PA0
PA0
CLK
CLK_PB4
PB4
CLK
CLK_PB0
PB0
CLK
CLK_PB3
PB3
CLK
supported MCUs
Supported microcontrollers
The board contains seven DIP sockets: DIP40A, DIP40B, DIP28, DIP20A, DIP20B,
DIP14,DIP8(Figure4-1).With dual powersupplyandsmart on-boardmikroProg,the
board is capable of programming about 65 dierent microcontrollers from Atmel®
AVR family. There are two DIP40 and DIP20 sockets for AVR® microcontrollers
provided on the board. Which of these sockets you will use depends solely on
the pinout of the microcontroller in use. The EasyAVR™v7 development system
comes with the ATmega32 microcontroller in a DIP40 package.
page 8
Figure 4-1: Schematic of on-board DIP sockets, quartz-crystal oscillator and decoupling capacitors
EasyAVRv7
Microcontroller sockets
AREF jumper
If you use DIP28 microcontroller socket with jumper J11 you can set PC7 pin
either as AVCC or I/O pin. Jumper J11 is placed in the AVCC position by default.

supported MCUs
Using external clock
Only one microcontroller may be plugged into the development board at the same time.
Before you plug the microcontroller into the
appropriate socket, make sure that the power
supply is turned o. Images above show how to
correctly plug a microcontroller. First make sure that
a half circular cut in the microcontroller DIP packaging
matches the cut in the DIP socket. Place both ends of
the microcontroller into the socket as shown in Figure
4-2. Then put the microcontroller slowly down until
all the pins match the socket as shown in Figure 4-3.
Check again if everything is placed correctly and press
the microcontroller until it is completely plugged into
the socket as shown in Figure 4-4.
Figure 4-2: Place both ends of microcontroller on
the socket so the pins are aligned correctly
Figure 4-3: with both ngers, evenly distribute
the force and press the chip into the socket.
Figure 4-4: Properly placed microcontroller will
have equally leveled pins.
Figure 4-5: Position of
the jumpers for DIP40x
How to properly place your microcontroller into the DIP socket?
1 2 3
IMPORTANT:
page 9
EasyAVRv7
AVR microcontrollers can use either built-in (internal) or quartz-crystal external clock for
the purpose of providing clock signal source. The EasyAVR™v7 contains one quartz-
crystal socket for all microcontroller sockets. DIP40A and DIP40B sockets are directly
connected to quartz-crystal socket unlike DIP28, DIP20A, DIP20B, DIP14 and DIP8
sockets which are connected to it through the pin jumpers (J13-J17). The value of the
quartz-crystal depends on the maximum clock frequency allowed and your application
as well. You can always replace the default 8MHz crystal with another one. If you want to
use microcontrollers in DIP40A and DIP40B packages, it is necessary to place jumpers
J13-J17 into the I/O position, Figure 4-5.The position of jumpers for DIP28, DIP20A,
DIP20B, DIP14 and DIP8 sockets is shown in Figure 4-6 to Figure 4-10.
Figure 4-6: Position of
the jumpers for DIP28
Figure 4-7: Position of
the jumpers for DIP20A
Figure 4-8: Position of
the jumpers for DIP20B
Figure 4-9: Position of
the jumpers for DIP14
Figure 4-10: Position of
the jumpers for DIP8

NOTE:
On-board programmer
What is mikroProg™?
How do I start?
programming
mikroProg™is a fast USB 2.0 programmer. Smart engineering allows mikroProg™
to support about 65 AVR® microcontrollers from Atmel® in a single programmer!
Outstanding performance and easy operation are among it's top features.
In order to start using mikroProg™and program your microcontroller, you just have to
follow two simple steps:
1. Install the necessary software
- Install USB drivers
- Install AVRFlash software
2. Power up the board, and you are ready to go.
- Plug in the programmer USB cable
- LINK LED should light up.
RESET or I/O?
Before using the programmer, make sure that reset selection
jumpers J6, J7, J8, J9, and J10 are placed into the mRST position for
all sockets.
Why so many LEDs?
Three LEDs indicate specic programmer operation. Link LED lights up when USB
link is established with your PC, Active LED lights up when the programmer is
active. Data is on when data is being transferred between the programmer and
PC software (compiler or AVRFlash).
page 10 EasyAVRv7
EasyAVR™v7 is equipped with JTAG connector compatible with Atmel® AVR®
JTAGICE mkII external programmer. You can use either the on-board mikroProg™
programmer or external programmer at the time. Place your programmer cable
onto connector CN6, as shown in image.
Programming with JTAGICE mkll programmer
Reset selection jumpers J6, J7, J8, J9, and J10 are used to set PC6, PA2, PB7, PB3
or PB5 pin either as RST or I/O pin, respectively. Each of the pins belongs to dierent
socket. For example, if you want to use PC6 pin (DIP28 socket) as I/O pin place
jumper into the PC6 position. Other jumpers must be in RST position. For DIP40A
and DIP40B sockets, all the reset selection jumpers must be in RST position.

programming
T9
VCC-5V
R21
10K
C5
100nF
LED-DATA
LED-LINK
USB-PROG_P
USB-PROG_N
VCC-5V
VCC-BRD
GND
MCU_RST MOSI_PA6 MISO_PA5 PA6 PA5 SCK_PA4 PA4 MOSI_PB0 MISO_PB1 PB0 PB1 SCK_PB2 PB2 MOSI_PB3 MISO_PB4 PB3 PB4 SCK_MOSI_PB5 PB5 MISO_PB6 PB6 PB7 SCK_PB7 BTN_RST
LED-ACTIVE
VCC-5V
LED-DATA
LED-LINK
VCC-3.3V
LINK ACTIVE DATA
R8
2K2
R9
4K7
R10
6K8
VCC-USB
USB-PROG_N
USB-PROG_P
FP1
C3
100nF
1
2
3
4
VCC
GND
D-
D+
CN1
USB
VCC-5VVCC-BRD
LD3LD1LD2
CN6
mRST
AVR JTAG
VCC-BRD
PC2
PC3
PC4
PC5
TCK
TDO
TMS
TDI
mRST SCK_PB7
MISO_PB6
PB7 PB6 SCK_MOSI_PB5
MOSI_PB3
MISO_PB4 PB5 PB3 PB4 SCK_PB2
MOSI_PB0
MISO_PB1 PB2 PB0 PB1 SCK_PA4
MOSI_PA6
MISO_PA5 PA4 PA6 PA5
J9J8J7J6
RST_PC6 RST_PA2
RST_PB7
RST_PB3
J10
RST_PB5
mRST
mRST
mRST
mRST
mRST
DIP14DIP20BDIP20ADIP28
RESET SELECTION
DIP8
PC6 PA2 PB7 PB3 PB5
BTN_RST
BTN_RST
R20
R22
R24
R25
LED-ACTIVE
DATA BUS
Figure 5-1: mikroProg™block schematic
page 11
EasyAVRv7

programming
Step 1 - Start Installation
Step 3 - Installing drivers Step 4 - Finish installation
Step 2 - Accept EULA
On-board mikroProg™requires drivers in order to work.
Drivers are located on the Product DVD that you received
with the EasyAVR™v7 package:
When you locate the drivers, please
extract les from the ZIP archive. Folder with extracted
les contains sub folders with drivers for dierent
operating systems. Depending on which operating system
you use, choose adequate folder and open it.
Installing programmer drivers
DVD://download/eng/software/
development-tools/avr/avrprog2/
avrprog2_drivers_v200.zip
In the opened folder you should
be able to locate the driver
setup le. Double click on setup
le to begin installation of the
programmer drivers.
Welcome screen of the installation. Just click on Next
button to proceed.
Drivers are installed automatically in a matter of
seconds.
You will be informed if the drivers are installed correctly.
Click on Finish button to end installation process.
Carefully read End User License Agreement. If you
agree with it, click Next to proceed.
page 12
Copyright©2012 Mikroelektronika.
Allrights reserved. MikroElektronika, MikroElektronika logo and other
MikroElektronika trademarksare thepropertyof MikroElektronika .
Allother trademarksare theproperty of their respective owners.
Unauthorisedcopying, hiring, renting, public performance
and broadcasting of thisDV D
isstrictlyprohibited.
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www.libstock.com
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EasyAVRv7

programming
Step 1 - Start Installation
Step 3 - Click Next button
Step 5 - Installation in progress
Step 2 - Accept EULA and continue
Step 4 - Choose destination folder
Step 6 - Finish Installation
Programming software
AVRFlash software Installation wizard - 6 simple steps
On-board mikroProg™programmer requires special programming software called
AVRFlash. This software is used for programming AVR® microcontrollers from
Atmel®. Software has intuitive interface and SingleClick™programming technology.
To begin, rst locate the installation archive on the Product DVD:
After downloading, extract the package and double click the
executable setup le, to start installation.
DVD://download/eng/software/development-tools/avr/avr-
prog2/avrprog2_programmer_v214.zip
page 13
Copyright©2012 Mikroelektronika.
Allrights reserved. MikroElektronika, MikroElektronika logo and other
MikroElektronika trademarksare thepropertyof MikroElektronika .
Allother trademarksare theproperty of their respective owners.
Unauthorisedcopying, hiring, renting, public performance
and broadcasting of thisDV D
isstrictlyprohibited.
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EasyAVRv7

UART via RS-232
communication
The UART (universal asynchronous
receiver/transmitter) is one of the most
common ways of exchanging data between
the MCU and peripheral components. It is
a serial protocol with separate transmit and
receive lines, and can be used for full-duplex
communication. Both sides must be initialized with
the same baud rate, otherwise the data will not be
received correctly.
RS-232 serial communication is performed through a
9-pin SUB-D connector and the microcontroller UART
module. In order to enable this communication, it
is necessary to establish a connection between
RX and TX lines on SUB-D connector and the
same pins on the target microcontroller using
DIP switches. Since RS-232 communication
voltage levels are dierent than
microcontroller logic levels, it is
necessary to use a RS-232
Transceiver circuit, such as
MAX3232 as shown
on Figure 6-1.
C2-
V-
RX-232
TX-232
RX-FTDI
RX-232
TX-FTDI
TX-232
J23
J12
DATA BUS
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
C1+
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
T1IN
T2IN
VCC
GND
T1OUT
R1IN
R1OUT
R2OUT
U3
MAX3232
5
9
4
8
3
7
2
6
1
1
5
96
CN12
DB-9
C11
100nF
C20
100nF
C22
100nF
C21
100nF
E2
10uF
VCC-BRD VCC-BRD
R35
100K
VCC-BRD
RS-232
CONNECTOR
1 2 3 4 5 6 7 8
O
N
SW10
RX
TX PD1
PD3
PD0
PD2
Figure 6-1: RS-232 connection schematic
Enabling RS-232
In order to enable RS-232
communication, you must set
J23 and J12 jumpers in the RS-
232 position, and enable desired
RX and TX lines via SW10 DIP
switch. For example, if you want
to enable RS-232 connection
on UART module of the default
ATmega32 chip, you should
enable SW10.1 (RD0) and
SW10.2 (RD1) lines.
page 14 EasyAVRv7

UART via USB
Modern PC computers, laptops and notebooks are
no longer equipped with RS-232 connectors and
UART controllers. They are nowadays replaced with
USB connectorsandUSBcontrollers. Still, certain technology
enables UART communication to be done via USB connection.
FT232RL from FTDI® convert UART signals to the appropriate USB
standard. In order to use USB-UART module on EasyAVR™v7, you must
rst install FTDI drivers on your computer. Drivers can be
found on Product DVD:
USB-UART communication is being done through
a FT232RL controller, USB connector (CN4), and
microcontroller UART module. To establish this connection,
you must put J23 and J12 jumpers in the USB-UART
position, and connect RX and TX lines to the
appropriate pins of the microcontroller.
This connection is done using DIP
switch SW10.
RX-FTDI
RX-232
TX-FTDI
TX-232
J23
J12
DATA BUS
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28
TXD
DTR#
RTS#
VCCIO
RXD
RI#
GND
NC
DSR#
DCD#
CTS#
CBUS4
CBUS2
CBUS3
CBUS0
CBUS1
OSCO
OSCI
TEST
AGND
NC
GND
GND
VCC
RESET#
3V3OUT
USBDM
USBDP
FT232RL
U1
FT232RL
VCC-5V
C6
100nF
LD12 LD13
RX-LED1
TX-LED1
R16
4K7
R15
2K2
R18
1K
R26
2K2
1
2
3
4
VCC
GND
D-
D+
CN4
USB B
C1
100nF
C2
100nF
E1
10uF
VCC-5VVCC-5V
TX-FTDI
RX-FTDI
USB UA RT I
CONNECTOR
FTDI1-D_N
FTDI1-D_P
VCC-BRD VCC-BRDVCC-BRD
VCC-BRD
R57
100K
VCC-BRD
1 2 3 4 5 6 7 8
O
N
SW10
RX
TX PD1
PD3
PD0
PD2
RX-FTDI
TX-FTDI
Figure 7-1: USB-UART connection schematic
Enabling USB-UART
In order to enable USB-UART
communication, you must set J23
and J12 jumpers in the USB-UART
position, and enable desired RX
and TX lines via SW10 DIP switch.
For example, if you want to enable
USB-UART connection on UART
module of the default ATmega32
chip, you should enable SW10.1
(RD0) and SW10.2 (RD1) lines.
DVD://download/eng/software/development-tools/
universal/ftdi/vcp_drivers.zip
page 15
communication
Copyright©2012 Mikroelektronika.
Allrights reserved. MikroElektronika, MikroElektronika logo and other
MikroElektronika trademarksare thepropertyof MikroElektronika .
Allother trademarksare theproperty of their respective owners.
Unauthorisedcopying, hiring, renting, public performance
and broadcasting of thisDV D
isstrictlyprohibited.
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PRODUCT DVD
www.mikroe.com
www.libstock.com
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EasyAVRv7

page 16
mikroBUS™sockets
Easier connectivity and simple conguration are
imperative in modern electronic devices. Success
of the USB standard comes from it’s simplicity of
usage and high and reliable data transfer rates. As
we in mikroElektronika see it, Plug-and-Play devices
with minimum settings are the future in embedded
world too. This is why our engineers have come up
with a simple, but brilliant pinout with lines that
most of today’s accessory boards require, which
almost completely eliminates the need of additional
hardware settings. We called this new standard the
mikroBUS™.EasyAVR™ v7 is the rst development
board in the world to support mikroBUS™with
three on-board sockets. As you can see, there are
no additional DIP switches, or jumper selections.
Everything is already routed to the most appropriate
pins of the microcontroller sockets.
AN - Analog pin
RST - Reset pin
CS - SPI Chip Select line
SCK - SPI Clock line
PWM - PWM output line
INT - Interrupt line
RX - UART Receive line
TX - UART Transmit line
DATA BUS
VCC-3.3V VCC-5V
AN
RST
CS
SCK
MISO
MOSI
3.3V
GND
PWM
INT
RX
TX
SCL
SDA
5V
GND
1VCC-3.3V VCC-5V
AN
RST
CS
SCK
MISO
MOSI
3.3V
GND
PWM
INT
RX
TX
SCL
SDA
5V
GND
2
MOSI
MISO
SCK
SDA
SCL
MOSI
MISO
SCK
SDA
SCL
PA5
PA6
PA7
PD2
PD4 PA0
PA1
PA3
PD3
PD5
VCC-3.3V VCC-5V
AN
RST
CS
SCK
MISO
MOSI
3.3V
GND
PWM
INT
RX
TX
SCL
SDA
5V
GND
3
MOSI
MISO
SCK
SDA
SCL
PA4
PB0
PB4
PB2
PB3
PD1
PD0
PD1
PD0
PD3
PD2
12345678
O
N
SW6
1234 5 6 7 8
O
N
SW3
12345678
O
N
SW5
MOSI
MISO
SCK
SDA
SCL
PB7
PB5
PB6
PB5
PB3
PB4
PB2
PB0
PB1
PA4
PA6
PA5
PB0
PB2
PC1
PC0
PC4
PC5
PA6
PA4
MOSI
MISO
SCK
SCK4
MISO4
MOSI4
SCK3
MISO3
MOSI3
SCK2
MISO2
MOSI2
SCK1
MISO1
MOSI1
SCL4
SDA4
SCL3
SDA3
SCL2
SDA2
SCL1
SDA1
DIP8
DIP28DIP20A
DIP14
DIP20B
DIP40B
DIP28
DIP14
I2C SELECTION
DIP20B
DIP40A
DIP40B
SPI SELECTION
SPI SELECTION
SPI and I2C selection
connectivity
EasyAVRv7
MISO - SPI Slave Output line
MOSI - SPI Slave Input line
+3.3V - VCC-3.3V power line
GND - Reference Ground
SCL - I2C Clock line
SDA - I2C Data line
+5V - VCC-5V power line
GND - Reference Ground
Each mikroBUS™host connector consists of two
1x8 female headers containing pins that are most
likely to be used in the target accessory board.
There are three groups of communication pins:
SPI, UART and I2Ccommunication. There are also
single pins for PWM, Interrupt, Analog input,
Reset and Chip Select. Pinout contains two power
groups: +5V and GND on one header and +3.3V
and GND on the other 1x8 header.
mikroBUS™host connector
Various microcontroller sockets have dierent pins for
SPI and I2C interface. In order to connect the SPI and
I2C pins of the mikroBUS™with the desired socket, you
have to change appropriate SW3, SW5 or SW6 DIP
switches to ON position, Figure 8-1.
Figure 8-1: mikroBUS™ socket with DIP switches schematic

connectivity
page 17
Click Boards™are plug-n-play!
LightHz click™microSD click™DAC click™DIGIPOT click™IR click™
RELAY click™ GSM2 click™
mikroElektronika portfolio of over 200 accessory boards is now enriched
by an additional set of mikroBUS™compatible Click Boards™. Almost each
month several new Click boards™are released. It is our intention to provide
the community with as much of these boards as possible, so you will be able
to expand your EasyAVR™v7 with additional functionality with literally zero
hardware conguration. Just plug and play. Visit the Click boards™webpage
for the complete list of available boards:
http://www.mikroe.com/click/
THERMO click™
GPS2 click™
WiFi PLUS click™
EasyAVRv7

One of the most distinctive features of EasyAVR™
v7 are it’s Input/Output PORT groups. They add so
much to the connectivity potential of the board.
Everything is grouped together
PORT headers, PORT buttons and PORT LEDs are next to each
other, and grouped together. It makes development easier, and the entire
EasyAVR™v7 cleaner and well organized. We have also provided an additional
PORT headers on the left side of the board, so you can access any pin you want
from both sides of the board.
Tri-state pull-up/down DIP switches
Tri-state DIP switches, like SW1 on Figure 9-2, are used
to enable 4K7 pull-up or pull-down resistor on any desired
port pin. Each of these switches has three states:
1. middle position disables both
pull-up and pull-down feature from
the PORT pin
2. up position connects the resistor
in pull-up state to the selected pin
3. down position connects the
resistor in pull-down state to the
selected PORT pin.
Figure 9-1: I/O group contains PORT headers, tri-state pull
up/down DIP switch, buttons and LEDs all in one place
LD21LD20LD19LD18LD17LD16LD15LD14
RN24
10K
RN23
10K
RN22
10K
RN21
10K
RN20
10K
RN19
10K
RN18
10K
RN17
10K
T17T16T15T14T13T12T11T10
PB0 PB1
PB2
PB3 PB4 PB5 PB6
PB7
PB0
PB1
PB2 PB3
PB4
PB5 PB6
PB7
12345678
O
N
SW10
1 2 3 4 5 6 7 8
+
_VCC-BRD VCC-BRD
UP
DOWN
PULL
CN9 CN10
1
2
3
4
5
6
7
8
9
10
CN11
VCC-BRD
PB0PB1
PB2PB3
PB4PB5
PB6PB7
PB0PB1
PB2PB3
PB4PB5
PB6PB7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
VCC-BRD
CN27
PB0PB1
PB2PB3
PB4PB5
PB6PB7
4k7
DATA BUS
SW4
VCC-BRD
PORTB_LEVEL
PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7
1 2 3 4 5 6 7 8
+
_
SW1
VCC
GND
BUTTON PRESS LEVELR13220
VCC-BRD
R12220
J2J1
PORTB_LED
connectivity
Figure 9-3: Schematic of the single I/O group connected to microcontroller PORTB
Input/Output Group
Figure 9-2: Tri-state
DIP switch on PORTB
page 18 EasyAVRv7

The logic state of
all microcontroller
digital inputs
may be changed
using push
buttons. Tri-state
DIP switch SW1
is available for selecting which logic state will be applied
to corresponding MCU pin when button is pressed, for
each I/O port separately. If you, for example, place SW1.2
in VCC position, then pressing any of push buttons in
PORTB I/O group will apply logic one to the appropriate
microcontroller pin. The same goes for GND. If DIP switch
is in the middle position neither of two logic states will
be applied to the appropriate microcontroller pin. You
can disable pin protection 220ohm resistors by placing
jumpers J1 and J2, which will connect your push buttons
directly to VCC or GND. Be aware that doing so you may
accidentally damage MCU in case of wrong usage.
Headers Buttons LEDs
connectivity
Figure 9-4: IDC10 male headers enable easy
connection with mikroElektronika accessory boards
With enhanced connectivity as one of the key features
of EasyAVR v7, we have provided three connection
headers for each PORT. I/O PORT group contains two
male IDC10 headers (like CN9 and CN10 on Figure
9-3). These headers are all compatible with over 70
mikroElektronika accessory boards, and enable simple
connection. There is one more IDC10 header available
on the left side of the board, next to the section with
displays. I/O PORT group also contains 1x10 connection
pad (like CN11 on Figure 9-3) which can be used for
connecting mikroElektronika PROTO boards, or custom
user boards.
LED (Light-Emitting
Diode) is a highly
ecient electronic
light source. When
connecting LEDs, it
is necessary to place
a current limiting
resistor in series
so that LEDs are
provided with the
current value specied by the manufacturer. The current
varies from 0.2mA to 20mA, depending on the type of the
LED and the manufacturer.. The EasyAVR™v7 board uses
low-current LEDs with typical current consumption of
0.2mA or 0.3mA, depending of VCC voltage selection.
Board contains 35 LEDs
which can be used for
visual indication of the
logic state on PORT pins.
An active LED indicates
that a logic high (1) is
present on the pin. In order
to enable PORT LEDs, it
is necessary to enable
the corresponding DIP
switches on SW10 (Figure
9-6).
Figure 9-6: SW10.5
through SW10.8
switches are used to
enable PORT LEDs
Microcontroller
PA0
PA1
PA2
PA3
page 19
SMD resistor
limiting current
through the LED
Figure 9-5: Button press
level DIP switch (tri-state)
EasyAVRv7
In the far upper right section of the
board, there is a RESET button, which
can be used to manually reset the
microcontroller.
Reset Button

Liquid Crystal Displays or LCDs are cheap and
popular way of representing information to the
end user of some electronic device. Character
LCDs can be used to represent standard and
custom characters in the predened number of
elds. EasyAVR™v7 provides the connector and the
necessary interface for supporting 2x16 character
LCDs in 4-bit mode. This type of display has two rows
consisted of 16 character elds. Each eld is a 7x5 pixel
matrix. Communication with the display module is done
through CN8 display connector. Board is tted with uniquely
designed plastic display distancer, which allows the LCD module
to perfectly and rmly t into place.
GND and VCC - Display power supply lines
Vo - LCD contrast level from potentiometer P2
RS - Register Select Signal line
E- Display Enable line
R/W - Determines whether display is in Read or Write mode. It’s
always connected to GND, leaving the display in Write mode all
the time.
D0–D3 - Display is supported in 4-bit data mode, so lower half of
the data byte interface is connected to GND.
D4–D7 - Upper half of the data byte
LED+ - Connection with the back-light LED anode
LED- - Connection with the back-light LED cathode
We have allowed LCD back-light to be enabled in two dierent
ways:
1. It can be turned on with full brightness using SW3.1 switch.
2. Brightness level can be determined with PWM signal from the
microcontroller, allowing you to write custom back-light controlling
software. This back-light mode is enabled with SW3.2 switch.
LCD 2x16 characters
Vss
Vdd
Vee
RS
R/W
E
D0 D1
D2 D3
D4 D5 D6 D7
A
K
CN8
LCD SOCKET
VCC-5V
P2
10K
VCC-5V
Q5
BC846
R32
56
R37
4K7
R36
1K
VCC-BRD
VEE
GND
GND GND GND GND GND
PC7 PC6 PC5 PC4 PD6 PA2
BCK PWM
BCK LIGHT
12345678
O
N
SW3
PD5
VCC-5V
DATA BUS
LCD BCK PWM
Figure 10-1: On-board LCD 2x16 display connector
Figure 10-2: 2x16 LCD
connection schematic Standard and PWM-driven back-light
Connector pinout explained
Make sure to turn o the power supply before placing LCD onto
the board. Otherwise your display can be permanently damaged.
In order to use PWM back-light both SW3.1 and SW3.2 switches must
be enabled at the same time.
IMPORTANT:
IMPORTANT:
page 20
displays
EasyAVRv7