SN8F5855 is an 8-bit architecture microcontroller which compatible with MCS-51 instruction set. It runs at up to 12.1 times faster than the original 8051 at the same frequency. Meanwhile, its advanced semiconductor technology provides a wide range operation voltage, from 1.8 V to 5.5 V, and working temperature between -40°C and 85°C at 8 MHz CPU clock rate.

The microcontroller builds in a 16 KB flash memory (IROM), 256 bytes internal RAM (IRAM) and 512 bytes on-chip external RAM (XRAM). Furthermore, a 16 input channels/12-bit resolution ADC, 4*35/6*33/7*32/8*31 R+C type LCD driver (140/198/224/248 dots), 8-set PWM generator with inverter, interfaces (2 UARTs, I2C, SPI) and 16-bit timers were designed to fit in the vast majority of consumer electronics, smart home appliances and wearable device.