Introduction to ATmega1284P-PU Microcontroller Architecture Feautures Register mode-pinout Applications
Introduction ATmega1284P-PU Microcontrollers:
The Atmel ATmega1284P is a low-power supply CMOS 8-bit microcontroller based on the AVR-enhanced RISC architecture. By executing powerful instructions in a single clock of the cycle the ATmega1284P achieves throughputs close to 1MIPS per MHz. This empowers the system designer to optimize the device for power supply consumption versus processing speed.
The high-performance Microchip eight-bit AVR RISC-based microcontroller combines 128KB ISP flash memory with read-while-write capabilities, 4KB EEPROM, 16KB SRAM, 32 general purpose I/O lines, 32 general purpose working registers, a real-time counter, three flexible timer/counters with compare modes and PWM, 2- USARTs, a byte-oriented two-wire serial interface, an 8-channel 10-bit A/D converter with optional differential input stage with programmable gain, programmable watchdog timer with internal oscillator, SPI serial port, a JTAG (IEEE 1149.1 compliant) test interface for on-chip debugging and programming, and six software selectable power supply saving modes. The device operates between 1.8-5.5 volts. By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power supply consumption and processing speed.
Spceifications:
-
Program Memory Size: 128 kB
-
Data Bus Width: 8bit
-
Maximum Frequency: 20MHz
-
RAM Size: 16 kB
-
Typical Operating Supply Voltage: 1.8-5.5 V
-
CPU Speed: 20MHz
-
Operating Frequency Max: 20MHz
ATmega1284P-PU Microcontrollers Pinout Configuration:
1. PE0 (pin-7) :PDI/RXD0 (Programming Data Input and UART0 Receive Pin)Atmega128L programming enables pin Atmega128L PEN Pin programming enables pin for the Serial Programming mode
2. TXD0 (pin-8) :PDO/TXD0 (Programming Data Output)and UART0 Transmit Pin
ATMEGA328P is a 64 pins chip as shown in the pin diagram above. Many pins of the chip here have more than one function. We will describe the functions of each pin in the below table.
3. PE (pin-9) :OC3A/AIN1
Analog Comparator Negative Input and Output Compare and PWM Output A for Timer/Counter3
Read Also:
Circuit Operation:
These are modified Harvard architecture eight-bit RISC single-chip microcontrollers. AVR was one of the first microcontroller families to use on-chip flash memory for program storage, as opposed to one-time programmable ROM, EPROM, and EEPROM used by other microcontrollers at the time.
ATmega8 microcontroller consists of 3 I/O ports, named B, C, or D with a combination of 23 I/O lines. Port D consists of 8 I/O lines, Port C consists of 7 I/O lines, or Port B consists of 8 I/O lines. Registers corresponding to the Input/output port X (B, C, and D) are DDRX: Data Direction Register of Port X.At the heart of an AVR microcontroller is a central processing unit (CPU) that executes instructions stored in the program of the memory. The CPU communicates with various peripherals such as timers, analog-to-digital converters, or communication interfaces.
The most widely used high-level language for AVR of the microcontrollers is C, so this document will focus on C programming. To ensure compatibility with most AVR C compilers, the code examples in this document are written using the ANSI C coding standard. The Atmel ATmega328 Microcontroller is an 8-bit megaAVR of the device based on the AVR-enhanced RISC architecture. By executing powerful instructions in a single clock cycle the ATmega328 achieves throughputs approaching 1 MIPS per MHz, balancing power consumption or speed.
Frequently Asked Questions
What is the purpose of Atmega?
ATmega328 is commonly used in many projects or autonomous systems where a simple, low-powered, low-cost microcontroller is needed. Perhaps the most common implementation of this chip is on the popular Arduino development platform, namely the Arduino Uno, Arduino Pro Mini, and Arduino Nano models.
Why is AVR used?
An automatic voltage regulator (AVR) is a device used in generators with the purpose of automatically regulating the voltage, which means that it will turn fluctuating voltage levels into constant voltage levels.
Is ATmega a microcontroller?
ATmega328/328P is an Advanced Virtual RISC (AVR) of the microcontroller. It supports eight-bit data processing. ATmega-328/328P has 32KB internal flash memory. ATmega328/328P has 1KB Electrically Erasable of the Programmable Read-Only Memory (EEPROM).
What is an Automatic Voltage Regulator?
An automatic voltage regulator (AVR) is an electronic device that maintains a constant voltage of the level for electrical equipment on the same load.
What is the AVR code?
AVR programming refers to the process of writing and uploading code to Atmel AVR microcontrollers. These microcontrollers are commonly used in a wide variety of embedded systems, including industrial automation, automotive applications, and consumer electronics.
