The Uno R3 CH340G ATmega328p Development Board is the low-cost version of the popular Uno R3 Arduino. It is assembled with the CH340 USB to Serial converter chip, instead of using an Atmega16U2 chip.
 
Specifications:
 
	
		
			
Model Type
			
			
Arduino Uno R3
			
		
		
			
Microcontroller Chip
			
			
ATmega328 (SMD) – Interface CH340G
			
		
		
			
Operating Voltage
			
			
5 V
			
		
		
			
Input Voltage(Recommended)
			
			
7-12V
			
		
		
			
Input Voltage (limit)
			
			
6-20V
			
		
		
			
Analog I/O Pins
			
			
6
			
		
		
			
Digital I/O Pins
			
			
14 (of which 6 provide PWM output)
			
		
		
			
PWM Digital I/O Pins
			
			
6
			
		
		
			
DC Current for 3.3V Pin
			
			
50 mA
			
		
		
			
DC Current per I/O Pin
			
			
40 mA
			
		
		
			
Clock Speed
			
			
16 MHz.
			
		
		
			
SRAM
			
			
2 KB (ATmega328)
			
		
		
			
EEPROM
			
			
1 KB (ATmega328)
			
		
		
			
Flash Memory
			
			
32 KB (ATmega328) of which 0.5 KB used by bootloader