ATmega2560 vs STM32F407

	STM32F407VGT6		ATmega2560
Price	$11		$9.1
Core	168 MHz		16MHz
Memories	Up to 1 Mbyte of Flash memory •Up to 192+4 Kbytes of SRAM		Program Memory Size (KB)256 SRAM Bytes 8,192 Data EEPROM/HEF (bytes) 4096
Clock, reset and supply management
Timers			2 x 8-bit, 4 x 16-bit
Communications interfaces			4-UART, 5-SPI, 1-I2C
Analog to digital converter (ADC)
I/Os			4 Input Capture, 4 CCP, 16PWM

Atmega328 vs STM32F103

	STM32F103C8T6		ATmega328
Price	$1.38		$2.15
Core	72 MHz		16MHz
Memories	64 or 128 Kbytes of Flash memory –   20 Kbytes of SRAM		32KBytes of In-System Self-Programmable Flash program Memory – 1KBytes EEPROM – 2KBytes Internal SRAM
Clock, reset and supply management	2.0 to 3.6 V application supply and I/Os –   POR, PDR, and programmable voltage detector (PVD) –   4-to-16 MHz cr ystal oscillator –   Internal 8 MHz factory-trimmed RC –   Internal 40 kHz RC –   PLL for CPU clock –   32 kHz oscillator for RTC with calibration		2.7 - 5.5V
Timers	7 timers –   Three 16-bit timers, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input –   16-bit, motor control PWM timer with dead- time generation and emergency stop –   2 watchdog timers (Independent and Window) –   SysTick timer 24-bit downcounter		3
Communications interfaces	Up to 9 communication interfaces –   Up to 2 x I2C interfaces (SMBus/PMBus) –   Up to 3 USARTs (ISO 7816 interface, LIN, IrDA capability, modem control) –   Up to 2 SPIs (18 Mbit/s) –   CAN interface (2.0B Active) –   USB 2.0 full-speed interface
Analog to digital converter (ADC)	2 x 12-bit, 1 μs A/D converters (up to 16 channels)
I/Os	Up to 80 fast I/O ports –   26/37/51/80 I/Os, all mappable on 16 external interrupt vectors and almost all 5 V-tolerant

ATmega8 vs STM8

	STM8S103F3P6	STM8S105C6T6 8BIT 32KB FLASH	ATmega8
Price	$0.99/2=$0.5 $2.54/5=$0.51	$0.99/1	$1.47/2=0.78 $3.18/5=$0.63
Core	16 MHz		16MHz
Memories	• Program memory: 8 Kbyte Flash; •Data memory: 640 byte true data EEPROM; •RAM: 1 Kbyte	•Program memory: up to 32 Kbyte Flash; •Data memory: up to 1 Kbyte true data EEPROM;  •RAM: up to 2 Kbyte	8KBytes of Flash program memory – 512Bytes EEPROM – 1KByte Internal SRAM
Clock, reset and supply management	2.95 to 5.5 V operating voltage 4 master clock sources –   Internal, user-trimmable 16 MHz RC –   Internal low-po wer 128 kHz RC •Clock security system with clock monitor		2.7 - 5.5V
Timers	•Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization •16-bit general purpose timer, with 3 CAPCOM channels (IC, OC or PWM) •8-bit basic timer with 8-bit prescaler		Two 8-bit Timer/Counters with Separate Prescaler, one Compare Mode – One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode – Real Time Counter with Separate Oscillator – Three PWM Channels
Communications interfaces	•UART with clock output for synchronous operation, SmartCard, IrDA, LIN master mode •SPI interface up to 8 Mbit/s •I2C interface up to 400 kbit/s		Byte-oriented Two-wire Serial Interface – Programmable Serial USART – Master/Slave SPI Serial Interface
Analog to digital converter (ADC)	10-bit, ±1 LSB ADC with up to 5 multiplexed channels, scan mode and analog watchdog		8-channel ADC in TQFP and QFN/MLF package • Eight Channels 10-bit Accuracy – 6-channel ADC in PDIP package • Six Channels 10-bit Accuracy
I/Os	Up to 28 I/Os on a 32-pin package including 21 high sink outputs		23 Programmable I/O Lines
	•96-bit unique key for each device