Custom mango unos CH340 Development board For arduinos LGT8F328P-QFP32 to replace mega328P Manufacturer

The schematic diagram of Mango UNOSs is based on the domestic chip LGT8F328P-QFP32 to replace Atmega328P (the difference between the two chips) and redesign to produce a compatible motherboard that can replace For arduinos UNOSs. Mango UNOSs features as follows

The size interface is fully compatible with the For arduinos UNOSs motherboard, all components are fully patched, and the back is flat;

The main chip is LGT8F328P, with an external 16M crystal oscillator, the serial port chip is the original CH340G chip with an external crystal oscillator, with higher precision and more stability;

All pins are led out, reserved for soldering, extended I2C, UART, A6, A7 interfaces;
The 3.3V output current of the motherboard can reach 500mA current, so that the motherboard can be connected to more peripherals;
The diode adopts low-voltage SS34, which can overcurrent 3A, and can withstand larger current when expanding external current.

Difference between Mango-UNOS and Arduino UNOS
Master LGT8F328P-QFN32 ATMEGA328P-PU
Serial chip Ch340G Atmega16u2
Input voltage 6~12V 6~12V
**Operating Voltage (Output Current) ** 5V(1000mA) 5V(500mA)
3.3V maximum output current 500mA 150mA
Main frequency External 16M crystal oscillator (maximum can be configured with internal 32M) External crystal oscillator 16M
Flash 32K (1K for boot, 2k for emulated errom) 32K (0.5k for boot)
SRAM 2K 2K
ERROM 1k 1K
Number of digital IOs 19 14
PWM 6 6
ADC 8-channel 12Bit 6-channel 10Bit
Reference voltage and accuracy 1.024V/2.048V/4.096V ±1% 1.1V ±0.2%
DAC 1 channel 8 bit None
I/O DC output capability 30mA (6 channels support 80mA high current) 20mA
Bootloader burning method SWD SPI
Dimensions 68.6 x 53.4 mm 20g 68.6 x 53.4 mm 25g