SI4455-C2A-GMR Datasheet, PDF (32/39 Pages) Silicon Laboratories – EASY-TO-USE, LOW-CURRENT OOK/(G)FSK SUB-GHZ TRANSCEIVER, TRANSMITTER, AND RECEIVER

Si4x55-C
7. Pin Descriptions
GND 1 20 19 18 17 16 nSEL
SDN 2
15 SDI
RXp 3
RXn 4
Si4x55
14 SDO
13 SCLK
TX 5
12 nIRQ
GND 6 7 8 9 10 11 GPIO1
Pin Pin Name
1
GND
2
SDN
3
RXp
4
RXn
5
TX
6
GND
7
V_DD
8
V_DD
9
GND
10
GPIO0
11
GPIO1
12
nIRQ
13
SCLK
14
SDO
15
SDI
16
nSEL
I/O
GND
I
I
I
O
GND
V_DD
V_DD
GND
I/O
I/O
O
I
O
I
I
Description
Ground
Shutdown (0 – V_DD V) – SDN=1, part will be in shutdown mode and contents of all
registers are lost. SDN=0, all other modes
Si4455: Differential RF receiver input
Si4055: No Connect
Si4355: Differential RF receiver input
Si4455: Differential RF receiver input
Si4055: No Connect
Si4355: Differential RF receiver input
Si4455: Transmit RF output
Si4055: Transmit RF output
Si4355: No Connect
Ground
Supply voltage
Supply voltage
Ground
General Purpose Digital I/O
General Purpose Digital I/O
Interrupt Status Output – nIRQ = 0, interrupt event has occurred. Read interrupt
status for event details
Serial Clock Input (0 – V_DD V): Provides serial data clock for 4-line serial data bus
Serial Data Output (0 – V_DD V): Provides serial data readback function of internal
control registers
Serial Data Input (0 – V_DD V): Serial data stream input for 4-line serial data bus
Serial Interface Select Input (0 – V_DD V): Provides select/enable function for 4-line
serial data bus
32
Rev 1.0