CA51F7 series chip is a special chip for humidifier developed by 8-bit microcontroller based on 1T 8051 core. Under normal circumstances, it runs 10 times faster than the traditional 8051 chip and has better performance. Built-in 16K Flash program memory can be repeatedly programmed, which brings great convenience to users. It not only retains the basic characteristics of the traditional 8051 chip, but also integrates functional modules such as 12-bit ADC, Touch Key, 16-bit PWM, UART, IC and low voltage detection (LVD). The chip supports communication with wireless modules and can realize intelligent control of products. Support three power saving modes: IDLE, STOP and low-speed operation to adapt to applications with different power consumption requirements. Built-in programmable FPG clock frequency suppression function is widely used in atomizers, humidifiers and medical beauty products, which can effectively reduce conduction interference.