8F328P-U MCU used by the LGT8F328P, is a Atmel MEGA328P compatible chip. 8F328D architecture design is relatively new, peripheral functions far stronger than Atmel MEGA328. Especially the program encryption ability is far more than MEGA328. 8F328D can use 3V3 and 5V power supply running at 16M frequency, excellent level compatibility. Built-in high-precision RC, no external crystal can be stable operation. Less peripheral parts, circuit design is simple.12-bit ADC (analog-to-digital conversion). On board DAC. Owned GUID (unique ID) can be used for chip program encryption. Built-in internal 1.024V / 2.048V / 4.096V ± 1% calibratable reference voltage source