WS2812 datasheet(82/98 Pages) RASPBERRY-PI

Il numero della parte	WS2812

Spiegazioni elettronici	Created by Phillip Burgess

PDF	98 Pages

Scroll/Zoom	100%

Produttore elettronici	RASPBERRY-PI [Raspberry Pi Holdings PLC]

Homepage	https://www.raspberrypi.com/

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82 / 98 page

bit first.

The data for pixel #0 (nearest the microcontroller) is issued first, then pixel #1, and so forth to the furthest pixel. This

does not operate like a traditional shift register!

After all the color data is sent, the data line must be held low for a minimum of 50 microseconds for the new colors to

“latch.”

You may want to dig through our Arduino library (https://adafru.it/aZU) for insights. The timing-critial parts are written in

AVR assembly language, but it’s extensively commented with C-like pseudocode.

My Microcontroller Isn’t Fast Enough to Do That

The WS2812 appears to be backwardly-compatible with the 400 KHz WS2811 signal. If you can precisely match the

latter chip’s timing, either type will respond. The WS2811 protocol is not simply a half-speed WS2812. The duty

cycle for the “0” and “1” bits is slightly different. From the WS2811 datasheet (https://adafru.it/cDS):

https://learn.adafruit.com/adafruit-neopixel-uberguide

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WS2812 Scheda tecnica(PDF) 82 Page - Raspberry Pi Holdings PLC