Comparison of Different types of Microcontroller

The comparison of different types of microcontroller with their features like speed, RAM and ROM size, applications, cost, types of interface, source of clock etc.... has been discussed in below table. 

Features	Microcontroller
	8051	AVR	ARM	PIC
Speed	60 MHZ	0 to 20 MHz	1.9 DMIPS/MHz	252 MHz core speed
Source of the clock	12    clock/instruction cycle	1 clock/instruction cycle	1 clock/instruction cycle	4 clock/instruction cycle
ROM Size	4 KB	256 KB	512 KB	4 KB – 128 KB
RAM Size	128 bytes	32 bytes	96 KB	256-4096 bytes
Cost	Rs. 513 per piece	Rs. 999 per piece	Rs. 450 per piece	Rs. 100 per piece
Applications	Robotics, GPS, GSM based projects applications Controlling remote industrial plant using SCADA	Specially designed to use in hobbyist and educational applications	Digital TVs, set-up boxes, smartphones, mobile, and laptops, etc.…	It is used in peripherals, audio accessories, games, etc.…
Types of Interface	UART, USART, SPI, I2C, etc.….	UART, USART, LIN, I2C, SPI, CAN, USB, Ethernet, etc.…	UART, USART, SPI, CAN, USB, Ethernet, DSP, Serial Audio Interface (SAI), etc.….	UART, USART, PIC, LIN, CAN, I2S, Ethernet, etc.….
Manufactured by	NXP, Atmel, Silicon Labs	Atmel	Apple, Nvidia, Qualcomm, Samsung Electronics	Microchip Average

AVR Microcontroller

PIC Microcontroller

AVR Microcontroller

8051 Microcontroller