SI4021-A1-FT Silicon Laboratories Inc, SI4021-A1-FT Datasheet - Page 19

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SI4021-A1-FT

Manufacturer Part Number
SI4021-A1-FT
Description
IC TX FSK 915MHZ 5.4V 16-TSSOP
Manufacturer
Silicon Laboratories Inc
Datasheet

Specifications of SI4021-A1-FT

Package / Case
16-TSSOP
Frequency
433MHz, 868MHz, 915MHz
Modulation Or Protocol
FSK, OOK
Data Rate - Maximum
512kbps
Power - Output
8dBm
Current - Transmitting
24mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
2.2 V ~ 5.4 V
Operating Temperature
-40°C ~ 85°C
Operating Frequency
433 MHz to 915 MHz
Mounting Style
SMD/SMT
Operating Supply Voltage
2.2 V to 5.4 V
Supply Current
1.5 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Applications
-
Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1622-5

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SI4021-A1-FTR
Manufacturer:
SILICON
Quantity:
5 000
9. Wake-Up Timer Command
The wake-up time period can be calculated as:
where M is defined by the <m7 : m0> digital value and R is defined by the <r4 : r0> digital value.
The value of R should be in the range of 0 and 23. The maximum achievable wake-up time period can be up to 24 days.
Note:
Software reset: Sending FE00h command to the chip triggers software reset. For more details see the Reset modes section.
10. Data Transmit Command
In EEPROM operation mode:
In microcontroller slave mode:
This command indicates that the following bitstream coming in via the serial interface is to be transmitted. In EEPROM mode, the 8-bit value
N of bits <n7 : n0> contains the number of data bytes to follow.
Note:
bit
bit
bit
15
15
1
1
7
1
F
This command is not needed if the transmitters’ power management bits (ex, es, ea) are fully controlled by the microcontroller and
TX data comes through the FSK pin.
If the crystal oscillator was formerly switched off (ex=0), the internal oscillator needs t
depends on the type of quartz crystal used.
If the synthesizer was formerly switched off (es=0), the internal PLL needs t
the internal locking process is finished.
In EEPROM mode, before issuing the Data Transmit Command, the power amplifier must be enabled, with the ea or a0 bit in the
Power Management Command.
In EEPROM mode, when N bytes have been read and transmitted the controller continues reading the EEPROM and processing the
data as control commands. This process stops after Sleep Command has been read from the EEPROM.
or continual operation the et bit should be cleared and set at the end of every cycle.
T
wake-up
14
14
1
1
6
1
= M * 2
13
13
1
0
5
0
R
12
12
r4
0
4
0
[ms] ,
11
11
r3
0
3
0
10
10
r2
1
2
1
r1
9
9
1
1
1
r0
8
8
0
0
0
m7
n7
7
7
m6
n6
6
6
m5
n5
5
5
m4
n4
4
4
sp
m3
n3
3
3
startup time. Valid data can be transmitted only when
m2
n2
2
2
m1
n1
1
1
sx
time, to switch on. The actual value
m0
n0
0
0
E000h
POR
POR
- -
Si4021
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