this ppt briefly describes you about the Arduino what is Arduino and functioning of Arduino and its pin configuration to make connections

1.  Introduction to arduino
 Architechture of arduino
 Pin configuration to arduino
 Serial communication
 Atmega 328-arduino pin mapping

4. Features
•High Performance, Low Power Atmel® AVR® 8-Bit
Microcontroller Family
•Advanced RISC Architecture – 131 Powerful
Instructions
–32 x 8 General Purpose Working Registers
• 32KBytes of In-System Self-Programmable Flash
program Memory
– 1KBytes EEPROM
– 2KBytes Internal SRAM
EEPROM – Data Retention: 20 years at 85°C/100 years
at 25°C(1) – Optional Boot Code Section with
Independent Lock Bits

5. Peripheral Features
•– Two 8-bit Timer/Counters with Separate Prescaler
and Compare Mode
•– One 16-bit Timer/Counter
•Temperature Measurement – 6-channel 10-bit ADC
•Two Master/Slave SPI Serial Interface
– Programmable Watchdog Timer with Separate On-
chip Oscillator

6. • Special Microcontroller Features
– Power-on Reset and Programmable Brown-out Detection
– External and Internal Interrupt Sources – Six Sleep
Modes: Idle, ADC Noise Reduction, Power-save, Power-
down, Standby, and Extended Standby
• I/O and Packages – 23 Programmable I/O Lines – 28-pin
PDIP,
• Operating Voltage: – 1.8 - 5.5V
• Temperature Range: – -40°C to 105°C
• Power Consumption at 1MHz, 1.8V, 25°C – Active Mode:
0.2mA – Power-down Mode: 0.1μA – Power-save Mode:
0.75μA (Including 32kHz RTC)

10.  VCC Digital supply voltage.
 GND Ground.
 Port B (PB[7:0]) XTAL1/XTAL2/TOSC1/TOSC2
Port B is an 8-bit bi-directional I/O port with
internal pull-up resistors (selected for each bit).

11. PB[7:6] is used as TOSC[2:1] input for the
Asynchronous Timer/Counter2
Port C (PC[5:0]) Port C is a 7-bit bi-directional I/O
port with internal pull-up resistors (selected for each
bit).
 PC6/RESET If the RSTDISBL Fuse is programmed,
PC6 is used as an I/O pin.
.Port D (PD[7:0]) Port D is an 8-bit bi-directional I/O
port with internal pull-up resistors (selected for each
bit).
AVCC is the supply voltage pin for the A/D Converter
AREF is the analog reference pin for the A/D
Converter.

13.  Serial communications provide an easy and flexible way for your Arduino
board to interact with your computer and other devices. This chapter
explains how to send and receive information using this capability.
 You can also send data from the Serial Monitor to Arduino by entering text
in the text box to the left of the Send button.
 Baud rate is selected using the drop-down box on the bottom right. You
can use the drop down labeled “No line ending” to automatically send a
carriage return or a combination of a carriage return and a line at the end of
each message sent when clicking the Send button.
 Your Arduino sketch can use the serial port to indirectly access (usually
via a proxy program written in a language like Processing) all the
resources (memory, screen, keyboard, mouse, network connectivity, etc.)
that your computer has. Your computer can also use the serial link to
interact with sensors or other devices connected to Arduino.

17. • Your sketch must call the Serial.begin() function before it
can use serial input or output.
• The function takes a single parameter: the desired
communication speed.
• You must use the same speed for the sending side and the
receiving side, or you will see gobbledygook (or nothing at
all) on the screen. This example and most of the others in
this book use a speed of 9,600 baud (baud is a measure of
the number of bits transmitted per second).
• The 9,600 baud rate is approximately 1,000 characters per
second. You can send at lower or higher rates (the range is
300 to 115,200), but make sure both sides use the same
speed.

21. int incomingByte = 0;
void setup()
{
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
}
void loop()
{
// send data only when you receive data:
if (Serial.available() > 0) {
// read the incoming byte:
incomingByte = Serial.read();
// say what you got:
Serial.print("I received: ");
Serial.println(incomingByte, DEC);
}
}

24. • I2C The two connections for the I2C bus are called SCL and
SDA.
• These are available on a standard Arduino board using
analog pin 5 for SCL, which provides a clock signal, and
analog pin 4 for SDL, which is for transfer of data (on the
Mega, use digital pin 20 for SDA and pin 21 for SCL).
• One device on the I2C bus is considered the master device.
Its job is to coordinate the transfer of information between
the other devices (slaves) that are attached.
• There must be only one master, and in most cases the
Arduino is the master, controlling the other chips attached
to it. Figure 13-1 depicts an I2C master with multiple I2C
slaves.

25. An I2C master with one or more I2C slaves

26.  SPI Recent Arduino releases (from release 0019)
include a library that allows communication with
SPI devices. SPI has separate input (labelled
“MOSI”) and output (labelled “MISO”) lines and a
clock line. These three lines are connected to the
respective lines on one or more slaves. Slaves are
identified by signalling with the Slave Select (SS)
line. Figure shows the SPI connections.