Ws2818m is packaged in cpc8. It is a special circuit for three channel LED drive control. External IC full-color double signal 5v32 lamp programmable LED lamp with outdoor engineering

WS2818M yes CPC8 encapsulation , It's three channels LED Drive control special circuit , The chip contains an intelligent digital interface data latch signal shaping and amplification drive circuit 、

High precision internal oscillator and 12V High voltage programmable constant current output driver and high-precision constant current control module , Effectively ensure the pixels on the drive circuit

The color of the spot light is highly consistent .

It has a unique breakpoint continuation function . The chip adopts two-way signal transmission , The two signal transmissions do not affect each other , In case of single chip damage

Does not affect the overall display effect . Users can choose the first chip DIN Foot or BIN The foot is used as the controller signal input foot , Other cores cascaded behind

The chip will automatically recognize the signal output by the first chip without affecting the overall effect .

The data protocol adopts the communication mode of single line zeroing code , After the chip is powered on and reset ,DIN The terminal receives the data transmitted from the controller , First send

Over here 24bit After the data is extracted by the first chip , Sent to the data latch inside the chip , The rest of the data is shaped and released by the internal shaping processing circuit

The Queen passed DO The port starts forwarding the output to the next cascaded pixel , Every transmission through a pixel , Signal reduction 24bit. The chip uses

Automatic shaping and forwarding technology , The number of cascaded pixels is not limited by signal transmission , Only limited signal transmission speed requirements . When using BIN

When the terminal is used as the signal receiving port of the controller , control BIN The control data of the port is better than the control DIN There are many port control data 24bit, In this way, we can guarantee

The points controlled by the two methods are the same .

The data latch inside the chip is based on the received 24bit data , stay OUTR、OUTG、OUTB The control end produces different duty cycle control

The signal , wait for DIN End input RESET Signal time , All chips synchronously send the received data to each segment , The chip will restart after the signal ends

Receive new data , Started after receiving 24bit After the data , adopt DO Port forward data port , The chip did not receive RESET Pre code ,OUTR、

OUTG、OUTB The original output of the pin remains unchanged , When you receive 280μs Above low level RESET After code , The chip will just receive 24bit PWM

The data pulse width is output to OUTR、OUTG、OUTB On the pin .