EVBavr05_en.pdf
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EVBavr05
evaluation board for AVR microcontrollers
ATmega16 or ATmega32.
User`s
manual
R
Many ideas one solution
REV 1.0
1. Introduction
EVBavr05
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), four seven-segment LED, RS232 interface,1-Wire
connector, I2C connector, JTAG connector, external FLASH memory 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 EVBavr05.
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2. Board layout.
1. Prototype area.
2. Additional components connector.
3. Thermometer LM35
4. LED`s and micro-switches
5. Potentiometers
6. RESET switch
7. Accumulator`s voltage pin .
8. Accumulator 3V6.
9. JTAG connector
10. Buzzer
11. ISP connector.
12. Power ON/OFF switch.
13. Input power jack (AC/DC).
14. Relay`s header.
15. RS232 port
16. I2C interface port
17. 1-Wire port
18. Processor, led out and doubled processor ports .
19. Real Time Clock DS1307.
20. LM317 voltage regulator.
21. LCD display (optional).
22. 7-segment LED.
23. FLASH memory
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3. Supported processors
ATmega16
ATmega32
FLASH
16 KB
32 KB
SRAM
1 KB
2 KB
EEPROM
512 B
1024 B
•
Two 8-bit Timer/Counters
with Separate Prescaler, one
Compare Mode
•
One 16-bit Timer/Counter
with Separate Prescaler,
Compare Mode, and Capture
Mode
•
Real Time Counter with
Separate Oscillator
•
four PWM Channels
•
8 channel , 10-bit ADC
•
Byte-oriented Two-wire
Serial Interface
•
Programmable Serial
USART
•
Master/Slave SPI Serial
Interface
•
JTAG interface
•
Programmable Watchdog
Timer with Separate On-chip
Oscillator
•
On-chip Analog Komparator
•
6 sleep modes
•
Two 8-bit Timer/Counters
with Separate Prescaler,
one Compare Mode
•
One 16-bit Timer/Counter
with Separate Prescaler,
Compare Mode, and
Capture
Mode
•
Real Time Counter with
Separate Oscillator
•
four PWM Channels
•
8 channel , 10-bit ADC
•
Byte-oriented Two-wire
Serial Interface
•
Programmable Serial
USART
•
Master/Slave SPI Serial
Interface
•
JTAG interface
•
Programmable Watchdog
Timer with Separate On-
chip Oscillator
•
On-chip Analog
Komparator
•
6 sleep modes
Pheripherals
Supply voltage
2.7V – 5.5V ver.16L
4.5V – 5.5V ver.16
2.7V – 5.5V ver.32L
4.5V – 5.5V ver.32
Clock frequency
0-8 MHz ver.16L
0-16 MHz ver.16
0-8 MHz ver.32L
0-16 MHz ver.32
Temperature range
-40° ÷ + 85°C
Cases
40-pin PDIP
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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 3V3, VTG becomes 3.3 V
DC and can be regulated from 3.3V to 1.6V by 3V3POT. The SUPPLY header allows for
direct access to the power jack input. Placing a jumper by passes the bridge and voltage
regulator.
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
5
Plik z chomika:
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