WS2821
Address Writer Instruction
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WS2821 Address Writer
is a controller specially designed for WORLDSEMI’s newest WS2821
IC which adopts parallel signal connection. Its main functions are as followings: write channel
address for the WS2821 LED driver IC and test the WS2821’s channel address.
Tips:
In this instruction data sheet,the font text require special attention and emphasis.
Especially attention to the port wiring, Wiring method is different for writing the address and
testing address , please read carefully, in case of doing damage to the individual IC. A complete
process for writing address are as followings:
1. Test new IC (this step is only recommended, not must do the test ,also it only have effect for
the ICs who haven’t been written address,see details described later)
2. Write address (Tips:Address writer’s "DATA" port connect with
WS2821 driver IC’s address
input port "ADD" , WS2821’s data input terminal connect with ground,
see details will be
described later).
3. Power off for WS2821, then power on, write address successful.
4. Address test (Tips:Address writer’s "DATA" port connect with DATA" port WS2821 driver IC
data input "ADDi" , see details described later)
5. Programs and effect test (listed in factory production menu, only recommend, see details
described later)
I. WS2821 LED Driver IC
Why we need to write address for WS2821 LED Driver IC?
● Since WS2821 is a new LED driver IC which is invented by WORLDSEMI, it adopts the parallel
transmission method, single pixel’s failure won’t effect any other pixels. However, for all the
WS2821 which is paralleled on one data line, then it shall receive the same channel. So we need
to address each WS2821, then we can control R
、
G
、
B via retrieving the address of the