SI4420 Datasheet, PDF (5/33 Pages) Silicon Laboratories – No alignment required in production

Typical Application
Typical application with FIFO usage
VCC
C1 C2
C3
1u 100p 10p
P7
P6
P5
P4
P3
P2
P1
P0
CLKin
VDI ^(optional)
SDI
1
SCK
2
nSEL
3
SDO
4
nIRQ
5
nFFS ^(optional) 6
FFIT ^(optional) 7
CLK ^(optional) 8
nRES ^{nRES (optional)}
16
15
14
13
Si4420 12
11
10
9
(optional)
TP C4
2.2n
X1
10MHz
PCB
Antenna
Si4420
Transmit mode
el=0 in Configuration Setting Command
Transmit mode
el=1 in Configuration Setting Command
Receive mode
ef=0 in Configuration Setting Command
Receive mode
ef=1 in Configuration Setting Command
Pin 6
TX Data input
Connect to logic
high
RX Data output
nFFS input
Pin 7
-
-
RX Data clock
output
FFIT output
5