SI4421-A0-FT Silicon Laboratories Inc, SI4421-A0-FT Datasheet - Page 14

• Manufacturer Part Number: SI4421-A0-FT
• Description: IC TXRX FSK 915MHZ 3.8V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4421-A0-FT

• Frequency: 433MHz, 868MHz, 915MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK
• Applications: ISM
• Power - Output: 7dbm
• Sensitivity: -110dBm
• Voltage - Supply: 2.2 V ~ 3.8 V
• Current - Receiving: 15mA
• Current - Transmitting: 28mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1737-5

Control Commands
In general, setting the given bit to one will activate the related function. In the following tables, the POR column shows the default
values of the command registers after power-on.
Control Register Default Values
10
11
12
13
14
15
16
17
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Control Command
Configuration Setting Command
Power Management Command
Frequency Setting Command
Data Rate Command
Receiver Control Command
Data Filter Command
FIFO and Reset Mode Command
Synchron Pattern Command
Receiver FIFO Read Command
AFC Command
TX Configuration Control Command
PLL Setting Command
Transmitter Register Write Command
Wake-Up Timer Command
Low Duty-Cycle Command
Low Battery Detector and
Microcontroller Clock Divider
Command
Status Read Command
Control Register
Configuration Setting Command
Power Management Command
Frequency Setting Command
Data Rate Command
Receiver Control Command
Data Filter Command
FIFO and Reset Mode Command
Synchron Pattern Command
Receiver FIFO Read Command
AFC Command
TX Configuration Control Command
PLL Setting Command
Transmitter Register Write Command
Wake-Up Timer Command
Low Duty-Cycle Command
Low Battery Detector and Microcontroller Clock Divider Command
Status Read Command
Related Parameters/Functions
Frequency band, crystal oscillator load capacitance,
RX FIFO and TX register enable
Receiver/Transmitter mode change, synthesizer,
crystal oscillator, PA, wake-up timer, clock output
enable
Frequency of the local oscillator/carrier signal
Bit rate
Function of pin 16, Valid Data Indicator, baseband
bandwidth, LNA gain, digital RSSI threshold
Data filter type, clock recovery parameters
Data FIFO IT level, FIFO start control, FIFO enable
and FIFO fill enable, POR sensitivity
Synchron pattern
RX FIFO read
AFC parameters
Modulation parameters, output power
CLK out buffer speed, dithering, PLL bandwidth
TX data register write
Wake-up time period
Enable and set low duty-cycle mode
LBD voltage and microcontroller clock division ratio
Status bit readout
Power-On Reset Value
CED4h
C22Ch
CA80h
CC77h
B8AAh
C80Eh
A680h
C623h
B000h
C4F7h
E196h
C000h
8008h
8208h
9080h
9800h
0000h
Related control bits
el, ef, b1 to b0, x3 to x0
er, ebb, et, es, ex, eb, ew, dc
f11 to f0
cs, r6 to r0
p16, d1 to d0, i2 to i0, g1 to g0, r2
to r0
al, ml, s, f2 to f0
f3 to f0, sp, ff, al, dr
b7 to b0
a1 to a0, rl1 to rl0, st, fi, oe, en
mp, m3 to m0, p2 to p0
ob1 to ob0, ddit, dly, bw0
t7 to t0
r4 to r0, m7 to m0
d6 to d0, en
d2 to d0, v3 to v0
Si4421
14