Features :

• Advanced RISC Architecture.
• 32 x 8 General Purpose Working Registers.
• Fully Static Operation.
• Up to 16 MIPS Throughput at 16 MHz.
• Advanced RISC Architecture.
• On-chip 2-cycle Multiplier.
• High Endurance Non-volatile Memory segments.
• 16 Kbytes of In-System Self-programmable Flash program memory.
• 512 Bytes EEPROM.
• 1 Kbyte Internal SRAM.
• Write/Erase Cycles: 10,000 Flash/100,000 EEPROM.
• Optional Boot Code Section with Independent Lock Bits.
• In-System Programming by On-chip Boot Program.
• True Read-While-Write Operation.
• Programming Lock for Software Security.
• JTAG (IEEE std. 1149.1 Compliant) Interface.
• Boundary-scan Capabilities According to the JTAG Standard.
• Extensive On-chip Debug Support.
• Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface.
• Peripheral Features.
• Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes.
• 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.
• 8 Single-ended Channels.
• 7 Differential Channels in TQFP Package Only.
• 2 Differential Channels with Programmable Gain at 1x, 10x, or 200x.
• Byte-oriented Two-wire Serial Interface.
• Programmable Serial USART.
• Master/Slave SPI Serial Interface.
• Programmable Watchdog Timer with Separate On-chip Oscillator.

Features: 

1. High Performance, Low Power Atmel®AVR® 8-Bit Microcontroller Family
2. Advanced RISC Architecture
3. High Endurance Non-volatile Memory Segments
4. Atmel® QTouch® library support
5. Peripheral Features
6. Special Microcontroller Features

Specifications:

1. 131 powerful instructions – Most Single Clock Cycle Execution
2. 32 x 8 general-purpose working registers
3. Fully static operation
4. Up to 20MIPS throughput at 20MHz
5. On-chip 2-cycle multiplier
6. Write/erase cycles: 10,000 flash/100,000 EEPROM
7. Optional boot code section with independent lock bits
8. In system programming by on-chip boot program
9. True read while write operation
10. Programming lock for software security
11. Two 8-bit timer/counters with separate prescaler and compare mode
12. One 16-bit timer/counter with separate prescaler, compare mode, and capture mode
13. Real-time counter with separate oscillator

Specifications:

1. Advanced RISC Architecture.
2. Up to 16 MIPS Throughput at 16 MHz.
3. On-chip 2-cycle Multiplier.
4. Write/Erase Cycles: 10,000 Flash/100,000 EEPROM.
5. Programming Lock for Software Security.
6. Programmable Serial USART.
7. Applications of ATmega8 Microcontroller:
8. Useful for Multiple DIY projects.

The ATmega32U4 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega32U4 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Features:

• The 89c51 is compatible with MCS 51 family.
• It has 8 bit data bus and 8 bit (arithmetic logic unit).
• It has 4k bytes of on chip reprogrammable flash memory.
• It supported three level program memory lock.
• It has 16 bit of address bus and 64 kb of RAM (random access memory) and ROM (read only memory).
• It has on chip RAM 128 bytes data memory.
• It has four 8 bit bidirectional input or output ports that is 32 programmable input or output lines.
• It can execute 1 million one cycle instructions per second with a clock frequency of 12MHz.
• It has one UART programmable serial ports.
• It has six interrupts source.
• It has two multimode 16 bit timers.
• It has two level interrupts priority.
• It has power saving mode.

Features:

1. CRC calculation unit
2. 4 to the 32MHz Crystal oscillator
3. 32kHz Oscillator for RTC with calibration
4. Internal 8MHz RC with x6 PLL option
5. Internal 40kHz RC oscillator
6. 0 to 3.6V Conversion range
7. 2.4 to 3.6V Separate analog supply
8. Independent and system watchdog timers
9. SysTick timer
10. Communication interfaces
11. Serial wire debug (SWD)