参数资料
型号: SI4022-A1-FT
厂商: Silicon Laboratories Inc
文件页数: 11/20页
文件大小: 726K
描述: IC TX FSK 915MHZ 3.8V 16-TSSOP
标准包装: 96
频率: 868MHz,915MHz
应用: ISM
调制或协议: FSK
数据传输率 - 最大: 115.2kbps
功率 - 输出: 6dBm
电流 - 传输: 24mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
电源电压: 2.2 V ~ 3.8 V
工作温度: -40°C ~ 85°C
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
包装: 管件
其它名称: 336-1623-5
11
Si4022
bit     15     14     13     12     11     10
9
8
7
6
5
4
3
2
1
0
POR
 
1
1
0
0
0
0
0
0
0
0
ex     es     etr     eb
et
dc
C002h
 
bit     15     14     13     12     11     10
9
8
7
6
5
4
3
2
1
0
POR
 
1
0
1
0
f11    f10     f9
f8
f7
f6
f5
f4
f3
f2
f1
f0
AD57h
 
 
 
 
 
Band [MHz]
C
868
10
915
11
 
Power Management Command
Bit 5 <ex>:
Enables the the crystal oscillator.
Bit 4 <es>:
Enables the synthesizer.
Bit 3 <etr>:
Enables the power amplifier. If the ex and es bit is not set, it switches on the crystal oscillator and the
synthesizer as well.
In FIFO mode (bit fe is set in the FIFO Setting Command) setting this bit will roll out the content of the FIFO.
Bit 2 <eb>:
Enables the low battery detector.
Bit 1 <et>:
Enables the wake-up timer.
Bit 0 <dc>:
Disables the clock output buffer.
The constant C is determined by
the selected band as:
Frequency Setting Command
The 12-bit parameter of the Frequency Setting
Command  has the value F. The value F
should be in the range of 96 and 3903. When F is out
of range, the previous value is kept. The synthesizer
center frequency f
0
 can be calculated as:
f
0
 = 8 * 10 MHz * (C + F/4000)
Bit
7
6
5
4
3
2
1
0
POR
 
1
1
0
0
0
1
1
0
-
 
Transmitter FIFO Write Command
With this command, the controller can write databits to the transmitter FIFO. Bit (fe) must be set in the FIFO Setting Command.
Note
Note
Note
Note
Note:    If faster operation is needed, then leave ex and es bit set to 1 and toggle only the etr bit.
Power Saving Modes
The different operating modes of the chip depend on the following control bits:
Operating Mode
eb or et
es
etr
ex
Active (transmit)
X
x
1
x
Idle
X
0
0
1
Sleep
1
0
0
0
Standby
0
0
0
0
 
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