Silicon Laboratories SI4421 Home Security System User Manual


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Si4421
5
Internal Pin Connections
Pin Name Internal connection
1 SDI
2 SCK
3 nSEL
PAD
1.5k
VSS
VDD
4 SDO
5 nIRQ
FSK
DATA
6
nFFS
DLCK
CFIL
7
FFIT
8 CLK
PAD
10
VSS
VDD
XTL
9
REF
Pin Name Internal connection
10 nRES
11 VSS
12 RF2
13 RF1
14 VDD
15 ARSSI
nINT
16
VDI
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