Wednesday 30 July 2014

Electrical Portal-EE2

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Electrical Portal-EE2

ATmega8 Microcontroller

Atmel® microcontrollers deliver a rich blend of highly efficient Integrated designs, proven technology, and groundbreaking innovation that is ideal for today's smart, connected products. In this era of the Internet of Things (IoT), microcontrollers comprise a key technology that fuels machine-to-machine (M2M) communications.

Building on decades of experience and industry leadership, Atmel offers proven architectures that are optimized for low power, high-speed connectivity, optimal data bandwidth and rich interface support. By using our wide variety of configuration options, developers can devise complete system solutions for all kinds of applications.

Atmel microcontrollers can also support seamless integration of capacitive touch technology to implement buttons, sliders and wheels. In addition, Atmel microcontrollers (MCUs) deliver wireless and security support. No matter what your market or device, Atmel offers a compelling solution that is tailored to your needs—today and tomorrow.

Memory: It has 8 Kb of Flash program memory (10,000 Write/Erase cycles durability), 512 Bytes of EEPROM (100,000 Write/Erase Cycles).  1Kbyte Internal SRAM
I/O Ports: 23 I/ line can be obtained from three ports; namely Port B, Port C and Port D.
Interrupts:  Two External Interrupt source, located at port D. 19 different interrupt vectors supporting 19 events generated by internal peripherals.
Timer/Counter: Three Internal Timers are available, two 8 bit, one 16 bit, offering various operating modes and supporting internal or external clocking.
SPI (Serial Peripheral interface): ATmega8 holds three communication devices integrated. One of them is Serial Peripheral Interface. Four pins are assigned to Atmega8 to implement this scheme of communication.
USART: One of the most powerful communication solutions is USART and ATmega8 supports both synchronous and asynchronous data transfer schemes. It has three pins assigned for that. In many projects, this module is extensively used for PC-Micro controller communication.
TWI (Two Wire Interface): Another communication device that is present in ATmega8 is Two Wire Interface. It allows designers to set up a commutation between two devices using just two wires along with a common ground connection, As the TWI output is made by means of open collector outputs, thus external pull up resistors are required to make the circuit.
Analog Comparator: A comparator module is integrated in the IC that provides comparison facility between two voltages connected to the two inputs of the Analog comparator via External pins attached to the micro controller.
Analog to Digital Converter: Inbuilt analog to digital converter can convert an analog input signal into digital data of 10bit resolution. For most of the low end application, this much resolution is enough.

Saturday 15 February 2014

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