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参数资料
| 型号： | 4021-DKDB14 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 15/34页 |
| 文件大小： | 783K |
| 描述： | KIT DEV TEST EZRADIO SI4021 TX |
| 标准包装： | 1 |
| 附件类型： | 测试卡，发射器，434MHz |
| 适用于相关产品： | EZRadio? |
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Si4021
15
3. Frequency Setting Command
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
A7D0h
The 12-bit parameter of the Frequency Setting Command <f11 :
f0> 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
= 10 MHz * C1 * (C2 + F/4000)
The constants C1 and C2 are determined by
the selected band as:
Band [MHz]
C1
C2
433
1
43
868
2
43
915
3
30
Note:
? For correct operation of the frequency synthesizer, the frequency and band of operation need to be programmed before the
synthesizer is started. Directly after activation of the synthesizer, the RF VCO is calibrated to ensure proper operation in the
programmed frequency band.
4. Data Rate Command
bit 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
POR
1
1
0
0
1
0
0
0
r7
r6
r5
r4
r3
r2
r1
r0
C800h
In EEPROM mode the transmitted bit rate is determined by the 8-bit value R (bits <r7 : r0>) as:
BR = 10 MHz / 29 / (R+1)
Apart from setting custom values, the standard bit rates from 2.4 to 115.2 kbps can be approximated with minimal error.
The commands are read out with a different fixed bit rate:
F
sck
= 10 MHz / 29 / 3 [~115.2 kHz]
Note:
? PLL bandwidth should be set according the data rate. Please see the PLL Setting Command.
5. Power Setting Command
bit
7
6
5
4
3
2
1
0
POR
1
0
1
1 ook p2 p1 p0
B0h
The bit ook enables the OOK mode for the PA, in this case the data to be transmitted are received through the FSK pin.
p2 p1 p0 Relative Output Power [dB]
0
0
0
0
0
0
1
-3
0
1
0
-6
0
1
1
-9
1
0
0
-12
1
0
1
-15
1
1
0
-18
1
1
1
-21
The output power is given in the table as relative to the
maximum available power, which depends on the actual
antenna impedance. (See: Antenna Application Note
available from www.silabs.com/integration).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 4021-DKDB2 | 功能描述:射频开发工具 Test Board BIFA Tx (915MHz) RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| 4021-DKDB3 | 功能描述:射频开发工具 Test Board BIFA Tx (868MHz) RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| 4021-DKDB7 | 功能描述:射频开发工具 Test Board xloop Tx (915/868MHz) RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
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