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WS7812QD Datasheet(Fiches technique) 7 Page - Will Semiconductor Ltd.

Numéro de pièce WS7812QD
Description  0.1GHz 3GHz DP12T Diversity Receive Antenna Switch
Télécharger  14 Pages
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Fabricant  WILLSEMI [Will Semiconductor Ltd.]
Site Internet  http://www.willsemi.com/index.php?siteid=2
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WS7812QD
Will Semiconductor Ltd.
7
Oct. 2017_V1.0
VDD
VDD
ON
VIO
ON
≥100us
VIO
Slave State
SDATA,SCLK
RF Signal
Shut Down
Start Up
Active
Shut Down
≥10us
REF
TRIGGER
RF
ON
VDD
OFF
RF
OFF
≥5us
≥100us
VIO
OFF
Note 3: VIO can be applied to the device after VDD or removed before VDD .
It is important to wait 10μs after VIO & VDD are applied
before sending SDATA to ensure correction data transmission. The minimum time between a power up and power down sequence (and
vice versa) is ≥ 100us.
Command Sequence Bit Definitions
Type
SSC
C11-C8
C7
C6-C5
C4
C3-C0
Parity
Bits
BPC
Extended Operation
DA7(1)-
DA0(1)
Parity
Bits
BPC
DA7(n)-
DA0(n)
Parity
Bits
BPC
Reg_0
Write,
Short
Command
Y
SA[3:0]
1b
Data[6:5]
Data[4]
Data{3:0]
Y
Y
-
-
-
-
-
-
Reg_0
Write,
Long
Command
Y
SA[3:0]
0
10b
Addr[4]
Data{3:0]
Y
-
Data[7:0]
-
-
-
Y
Y
Reg_1
Write
Y
SA[3:0]
0
10b
Addr[4]
Data{3:0]
Y
Y
Data[7:0]
-
-
-
Y
Y
Reg
Read
Y
SA[3:0]
0
11b
Addr[4]
Data{3:0]
Y
Y
Data[7:0]
-
-
-
Y
Y
Legend:
SSC = Sequence start command
DA = Data/address frame bits
BC = Byte count (# of consecutive addresses)
C = Command frame bits
BPC = Bus park cycle




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