EVBavr03_en.pdf
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EVBavr03
evaluation board for AVR microcontrollers
AT90S4144/8515, ATmega8515
and ATmega162.
User`s
manu l
R
Many ideas one solution
REV 1.0
1. Introduction
EVBavr03
is a development board designer for the hobbyist and engineers who want to
quickly prototype their system based on AVR microcontrollers from Atmel. Developer
has access to all pins of the micro, which are brought to the header (pin connectors) and
labeled accordingly. Depending upon the board`s configuration (listed versions) some or
all of the following components are found on the board: thermometer, potentiometer,
relay, buzzer, RTC (real time clock) and LCD display (2x16). The pin headers provided
allow easy access to all these components. In addition, there are eight micro-switches
and eight diodes which could be connected to any of the pin connectors or additional
components, which may be placed on the large, adjacent prototype area. The power
circuitry on board (bridge, voltage regulator) eliminates the need for an external
regulated power supply. This board comes with the several examples of the C code
routines (source from), to facilitate testing and quick development in using the board`s
resources.
We wish great success and full satisfaction while designing and
constructing appliances based on EVBavr03.
2
2. Board layout.
1. Prototype area.
2. Additional components connector.
3. LED`s and micro-switches
4. Potentiometr
5. RESET switch
6. Accumulator 3V6.
7. Speaker
8. Programmer header.
9. Power ON/OFF switch.
10. Input power jack (AC/DC).
11. Relay`s headers.
12. RS232 port
13. Processor, led out and doubled processor ports .
14. Real Time Clock DS1307.
15. LM317 voltage regulator.
16. LCD display (optional).
17. 7-segment LED.
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3. Supported processors
AT90S4144/8515
ATmega8515
ATmega162
FLASH
4/8 kb
8 kb
16 kb
SRAM
256/512 b
512 b
1 kb
EEPROM
256/512 b
512 b
512 b
•
8-bit
Timer/Counter,
•
Analog
comparator,
•
SPI,
•
Programmable
timer Watchdog
with integrated
oscillator.
•
UART
•
Up to 64kb
optional external
memory space
•
8-bit
Timer/Counter,
•
16-bit
Timer/Counter,
•
Analog
komparator,
•
Three PWM
channels
•
Programmable
timer Watchdog,
•
SPI,
•
Full Duplex
UART
•
Up to 64kb optional
external memory space
•
8-bit Tirem/Counter,
•
16-bit licznik,
•
Analog komparator
•
programmable
Watchdog,
•
six PWM channles
•
SPI,
•
USI
•
Full Duplex UART
Pheripherals
Supply voltage
2.7 V – 6 V ver.4
4 V – 6 V ver. 8
2.7V – 5.5V
4.5V – 5.5V ver.L
2.7V – 5.5V
1.8V – 5.5V ver.V
Clock frequency
0-4 MHz ver.4
0-8 MHz ver.8
0-8 MHz ver.8515L
0-16 MHz ver.8515
ATmega162V:
0 - 8 MHz
ATmega162:
0 - 16 MHz
Temperature range
-40° ÷ + 85°C
Cases
40-pin PDIP
4. Power supply for board
Recommended external power supply voltage is 7-12V AC, or 9-15V DC. A standard
power jack (bolt diameter 2.1mm - negative) is provided at the edge of the board.
Stabilized voltage VTG is available on the double header and on the prototype area of the
board. The selection of the VTG is provided through a 3V3 header. The default voltage
VTG is 5V DC (no jumper on 3V3 header). By placing a jumper VTG becomes 3.3 VDC.
The SUPPLY header allows for direct access to the power jack input. Placing a jumper by
passes the bridge and voltage regulator.
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5. Peripheral circuits
5.1. LEDs
The board has 8 LED diodes, which make the simplest interface between the system and
the user. This is especially useful for the beginners, who want to manipulate or debug their
program with different hardware configurations. The diode turns on after grounding of the
associated Ldn (n = 0 – 8) pin
.
Figure 1. LED diodes
5.2. Switches
The board is equipped with 8 micro-switches. Pressing one of them causes grounding of
the corresponding pin on the SW header
.
Figure 2. Switches
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