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参数资料
| 型号： | 4320-DKDB5 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 22/36页 |
| 文件大小： | 0K |
| 描述： | KIT DEV TEST EZRADIO SI4320 RX |
| 标准包装： | 1 |
| 附件类型： | 测试卡，接收器，868MHz |
| 适用于相关产品： | EZRadio? |
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Si4320
Low Power Duty-Cycle Operation (LPDM)
To use this mode, pin 8 must be connected to VDD. The logic value of pin 8 defines whether the receiver works in Low Power Duty-Cycle
Mode (LPDM) or not. If the value is high (VDD detected), the chip will wake up in every 300 ms. If the value is low (GND detected), then the
chip is continually ON (active). The chip uses the internal wake-up timer and counter for timing the on/off process. This method reduces the
overall current consumption, which should permit approximately 6 months operation from a 1500 mAh battery.
Low Power Duty-Cycle Internal Operations and Timings (Wake-up on Radio)
The wake-up timer event switches on the crystal oscillator, the internal logic waits about 2.25ms. When the oscillator is stable the controller
switches on the synthesizer as well. The receiver monitors the incoming signal strength during this “ON” state of LPDM. If in the next 6ms the
incoming signal strength is above the defined limit (-103dBm if FCS0=0 or -97dBm if FCS0=1), the synthesizer remains switched on for
30.5ms, otherwise it switches itself off after the 6ms operation time. The period time is about 300ms.
Xtal osc.
enable
Synthesizer
enable
DRSSI
Pattern
recognition
2.25ms
8.25ms
300ms
30.5ms
300ms
30.5ms
300ms
Active
Synchron word (2DD4h) received
Start of new cycle
Note 1:
Note 2:
Every detected synchron word restarts the timer, which controls the ‘ON’ state of the receiver.
If the internal Pattern Recognition block is active (decoding the synchron word), then the internal logic does not switch the
synthesizer off until the incoming data is fully processed.
RX-TX ALIGNMENT PROCEDURES
RX-TX frequency offset can be caused only by the differences in the actual reference frequency. To minimize these errors it is suggested to
use the same crystal type and the same PCB layout for the crystal placement on the RX and TX PCBs.
To verify the possible RX-TX offset it is suggested to measure the CLK output of both chips with a high level of accuracy. Do not measure the
output at the XTL pin since the measurement process itself will change the reference frequency. Since the carrier frequencies are derived
from the reference frequency, having identical reference frequencies and nominal frequency settings at the TX and RX side there should be
no offset if the CLK signals have identical frequencies.
It is possible to monitor the actual RX-TX offset using the AFC status report included in the status byte of the receiver. By reading out the
status byte from the receiver, the actual measured offset frequency will be reported. In order to get accurate values the AFC has to be
disabled during the read by clearing the "en" bit in the AFC Control Command (bit 0).
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相关PDF资料 |
PDF描述 |
|---|---|
| 4320-DKDB4 | KIT DEV TEST EZRADIO SI4320 RX |
| PSL0101WBFD1 | LED WHITE 90LM 350MA 3000K SSML |
| PSL0101WBFB1 | LED WHITE 80LM 350MA 3000K SSML |
| V600-IDSC02 | V600 CTRL 2 CH |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 4320-DKDB8 | 功能描述:射频开发工具 Test Board xloop Rx (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 |
| 4320-DKDB9 | 功能描述:射频开发工具 Test Board xloop Rx (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 |
| 4320-L15 | 制造商:American Denki 功能描述: |
| 4320-P | 制造商:American Denki 功能描述: |
| 4320PA51G01800 | 功能描述:GK,NICU,NRSG,PU,V0,DSH 制造商:laird technologies emi 系列:- 零件状态:有效 形状:D 形 厚度 - 总:0.050"（1.30mm） 宽度:0.140"（3.60mm） 长度:18.000"（457.20mm） 粘合剂:- 温度范围:- 标准包装:105 |
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