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W55RFS27R1B Schematic ( PDF Datasheet ) - nuvoton

Teilenummer W55RFS27R1B
Beschreibung Super-Regeneration RF Receiver
Hersteller nuvoton
Logo nuvoton Logo 




Gesamt 15 Seiten
W55RFS27R1B Datasheet, Funktion
W55RFS27R1B DataSheet
Super-Regeneration RF Receiver
W55RFS27R1B
Data Sheet
1
Revision: A3.0
Publish Date: Feb. 2010






W55RFS27R1B Datasheet, Funktion
W55RFS27R1B DataSheet
System Description
2.1 W55RFS27R1B System Block Diagram
OSCin
OSCout
RSAW
Ring osc
Oscillator
Saw Generator
Power-On Reset
RESET
Amp.&
Rectifier
Power
Regulator
S.C. Filter
Data Slicer
Baseband
Decoder
RXD
MODE0
MODE1
F B L R F1 F2
6
Revision: A3.0
Publish Date: Feb. 2010

6 Page









W55RFS27R1B pdf, datenblatt
W55RFS27R1B DataSheet
W55RFS27R1B Application Schematic BOM:
Item Qty
Reference
Part
________________________________________________________________________________
1 1 ANT1
ANTENNA
2 1 C1
4pF
3 1 C2
16P
4 1 C3
18P
5 1 C4
100nF
6 2 C7,C5
10u
7 1 C6
47n
8 1 JP2
Output
9 1 JP3
MODE0SEL
10 1
JP4
MODE1SEL
11 1
L0
0.82u
12 1
R2
47K(1%)
13 1
R3
16K(1%)
14 1
U1
W55RFS27R1B
4.2 W55RFS27R1B Smart-DetectorWB Function
4.2.1 Introduction
Smart-Detector Function enables on-chip
OAGC(Oscillator Auto-Gain-Control) and Hopping
clock function, is designed for recovery of
components deviation and environment change. It
dynamically searches the best operating condition
and maintains best sensitivity in various
environments.
The control mechanism is built with the
communication protocol of
W55RFS27T1BW55RFS27R1B, which is effective
under manual-mode operation. While in uC-mode,
the OAGC and hopping must be fixed or be
controlled by external MCU.
4.2.2 Using Smart-DetectorWB in Manual-mode
a). Set [MODE1:MODE0]=[00] to disable Smart-DetectorWB , then select a proper value for RSAW which makes
the highest sensitivity. Note the default value is set OAGC[2:0] ={0,1,0}and HOPCLK=0.
b). Set [MODE1:MODE0]=[11] to enable Smart-DetectorWB. Then the (OAGC2,OAGC1,OAGC0) is switched
by following sequence. HOPCLK repeats “0” and “1” toggle every T seconds.
start
T TT
(1,0,0)
(1,0,0)
(0,1,1)
TTT
(0,0,0)
(0,0,1)
(0,1,0)
( T ~= 20ms)
12
Revision: A3.0
Publish Date: Feb. 2010

12 Page





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