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参数资料
| 型号： | 4421-DKDB2 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 20/45页 |
| 文件大小： | 0K |
| 描述： | KIT DEV TEST EZRADIO SI4421 TRX |
| 标准包装： | 1 |
| 附件类型： | 测试卡，收发器，434MHz |
| 适用于相关产品： | EZRadio? |
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Si4421
Bits 2-0 ( f2 to f0 ):
DQD threshold parameter.
The Data Quality Detector is a digital processing part of the radio, connected to the demodulator - it is an indicator
reporting the reception of an FSK modulated RF signal. It will work every time the receiver is on. Setting this
parameter defines how clean incoming data stream would be stated as good data (valid FSK signal).
If the internally calculated data quality value exceeds the DQD threshold parameter for five consecutive data bits
for both the high and low periods, then the DQD signal goes high.
The DQD parameter in the Data Filter Command should be chosen according to the following rules:
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The DQD parameter can be calculated with the following formula:
DQD par = 4 x (deviation – TX-RX offset ) / bit rate
It should be larger than 4 because otherwise noise might be treated as a valid FSK signal
The maximum value is 7.
7. FIFO and Reset Mode Command
Bit
15
1
14
1
13
0
12
0
11
1
10
0
9
1
8
0
7
f3
6
f2
5
f1
4
f0
3
sp
2
al
1
ff
0
dr
POR
CA80h
Bits 7-4 ( f3 to f0 ):
Bit 3 ( sp ):
FIFO IT level. The FIFO generates IT when the number of received data bits reaches this level.
Select the length of the synchron pattern:
sp
0
1
Byte1
2Dh
Not used
Byte0 (POR)
D4h
D4h
Synchron Pattern (Byte1+Byte0)
2DD4h
D4h
Note: The synchron pattern consists of one or two bytes depending on the sp bit. Byte1 is fixed 2Dh, Byte0 can be programmed by
the Synchron Pattern Command (page 21).
Bit 2 ( al ):
Set the input of the FIFO fill start condition:
al
0
1
FIFO fill start condition
Synchron pattern
Always fill
20
相关PDF资料 |
PDF描述 |
|---|---|
| 4420-DKDB2 | KIT DEV TEST EZRADIO SI4420 TRX |
| 4421-DKDB1 | KIT DEV TEST EZRADIO SI4421 TRX |
| 4322-DKDB1 | KIT DEV TEST EZRADIO SI4322 RX |
| 4021-DKDB13 | KIT DEV TEST EZRADIO SI4021 TX |
| ASPI-0418FS-KIT | INDUCTOR KIT SHIELD ASPI |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 4421-DKDB5 | 功能描述:射频开发工具 Test Board BIFA TRx (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 |
| 4421-DQ0025 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Heavy Duty Incremental Rotary Shaft Encoder |
| 4421-DQ4096 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Heavy Duty Incremental Rotary Shaft Encoder |
| 4421-DS0025 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Heavy Duty Incremental Rotary Shaft Encoder |
| 4421-DS4096 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Heavy Duty Incremental Rotary Shaft Encoder |
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