JTAG stands for “Joint Test Action Group” which was standardized as the IEEE 1149.1 Standard Test Access Port and Boundary-Scan Architecture in 1990. JTAG is generally used in IC debugging and device programming. Atmega16 consists of one JTAG port which shares four pins with PORTC. Until JTAG port is not disabled, these pins can’t be used as normal […]
How to disable JTAG of AVR microcontroller Read More »
This article explains interfacing of LCD with ATmega16 using 4-bit mode. In this mode only four pins are used for sending data and command instructions. This mode has the advantage over the 8-bit mode as it uses less number of pins. The remaining pins of the controller are available for normal use. The Data or
How to interface LCD in 4 bit mode with AVR microcontroller Read More »
This article is in continuation of PWM generation using AVR timer. In the previous article, PWM generation using Phase correct PWM mode is described. However, there are some applications like DAC, power regulation and rectification etc. which require high frequency PWM wave. The PWM generation using Fast PWM mode is suitable for such applications. This
How to use fast PWM (Pulse Width Modulation) Mode of AVR microcontroller Timer Read More »
Pulse Width Modulation is well known technique for controlling power electronics devices like SCR, IGBT etc. PWM is also used in motor speed controlling. Square wave generation by using AVR timers is explained in previous article. The AVR timers have feature of PWM wave generation as well .This article describes PWM generation capability of AVR
Phase Correct PWM (Pulse Width Modulation) Mode of AVR microcontroller Timer Read More »
At times we come across applications or situations wherein we need to generate square waves with the microcontroller. The square wave can be generated by programming a pin which toggles between 0 and 1 with a certain time delay. Alternatively, the inbuilt feature of AVR timers can be used in square wave generation. The advantage
Waveform Generation using AVR Microcontroller (Atmega16) Timers Read More »
This article introduces the concept of interrupts and the different types of interrupts in AVR Microcontroller (ATmega16). Interrupt as the name suggests, interrupts the current routine of the microcontroller. Microcontroller executes instructions in a sequence as per the programs. Sometimes there may be a need of handling planned and higher priority events instantaneously that might
How to use External (Hardware) Interrupts of AVR Microcontroller (ATmega16) Read More »
ATmega16 has 32 I/O pins to communicate with external devices. Before interfacing with external devices, these pins must be cofigured as input or output pin. This article demonstrates the basic I/O operation of ATmega 16 using LEDs. All the four ports can be configured to read an input from some external device or to give
How to interface LED with AVR Microcontroller (ATmega16) Read More »
Keypad is most widely used input device to provide input from the outside world to the microcontroller. The keypad makes an application more users interactive. The concept of interfacing a keypad with the ATmega16 is similar to interfacing it with any other microcontroller. The article of Interfacing keypad with 8051 can be referred for detailed
How to interface keypad with AVR microcontroller (ATmega16) Read More »
Servo motors find huge applications in industries in the field of automation, control & robotics. The servo motors are well known for their precise control and work on the principle of servo mechanism. The servo motors can be made to run at precise angle using PWM. The PWM (pulse width modulation) is the basic working
How to interface Servo Motor with AVR Microcontroller (ATmega16) Read More »
This article explores the TWI interfacing between two ATmega32 controllers. Readers are advised to go through TWI Communication and TWI registers of ATmega32 before going further. TWI works in four modes: 1. MASTER as a transmitter. 2. MASTER as a receiver. 3. SLAVE as a receiver. 4. SLAVE as a transmitter. Generally modes 1 &
How to use I2C / TWI (Two Wire Interface) in AVR ATmega32 Read More »
