Smart home displayManufacturer Cardi SummarySerial screenCommunication working principle, serial port screen is composed of display drive plate, housing, LCD LCD display three parts, a set of single-chip or PLC with controller display scheme, the display scheme of communication part by serial communication, USART serial port or serial port, etc.

Microcontrollers is an integrated circuit chip that integrates a small and sophisticated micro-computer system on a silicon chip using ultra-large-scale integrated circuit technology to integrate a small and sophisticated micro-computer system with data processing capabilities such as CPU, random memory RAM, read-only memory ROM, multiple I/O ports and interrupt systems, timers/counters, etc. (which may also include display drive circuits, pulse-width modulation circuits, analog multiplexers, A/D converters, etc.) From the 1980s, from the then 4-bit, 8-bit microcontroller, to the current 300M high-speed microcontroller.

USART is a full-duplex universal synchronous/asynchronous serial transceiver module that is a highly flexible serial communication device. Contains three major clock generators, data transmitters, and receivers. The control register is shared for all modules.

The SPI (Serial Peripheral Interface- Serial Peripheral Interface) bus system is a synchronous serial peripheral interface that enables the MCU to communicate serially with various peripheral devices to exchange information. Spi buses can be directly connected to a wide range of standard peripherals manufactured by various manufacturers, including FLASHRAM, network controllers, LCD display drivers, A/D converters and MCUs. The interface typically uses 4 lines: serial clock line (SCLK), host input/slave output data line MISO, host output/slave input data line MOSI, and low-level effective slave selection line NSS.