- 您现在的位置：买卖IC网 > PDF目录21904 > 4421-DKDB2 (Silicon Laboratories Inc)KIT DEV TEST EZRADIO SI4421 TRX PDF资料下载
参数资料
| 型号： | 4421-DKDB2 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 29/45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? |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页当前第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页
Si4421
The best practice in interrupt handling is to start with a status read when interrupt occurs, and then make a decision based on the
status byte. It is very important to mention that any interrupt can “wake-up” the EZradio chip from sleep mode. This means that the
crystal oscillator starts to supply clock signal to the microcontroller even if the microcontroller has its own clock source. Also, the
Si4421 will not go to low current sleep mode if any interrupt remains active regardless to the state of the ex (enable crystal
oscillator) bit in the Power Management Command (page 15). This way the microcontroller always can have clock signal to process
the interrupt. To prevent high current consumption and this way short battery life, it is strongly advised to process and clear every
interrupt before going to sleep mode. All unnecessary functions should be turned off to avoid unwanted interrupts. Before freezing
the microcontroller code, a thorough testing must be performed in order to make sure that all interrupt sources are handled before
putting the radio device to low power consumption sleep mode. If the dc bit is set in the Power Management Command , then only
the ex bit controls the crystal oscillator (supposing that both the er and et bits are cleared), the interrupts have no effect on it.
TX REGISTER BUFFERED DATA TRANSMISSION
In this operating mode (enabled by bit el, in the Configuration Setting Command , page 15) the TX data is clocked into one of the two
8-bit data registers. The transmitter starts to send out the data from the first register (with the given bit rate) when bit et is set with
the Power Management Command (page 15). The initial value of the data registers (AAh) can be used to generate preamble. During
this mode, the SDO pin can be monitored to check whether the register is ready (SDO is high) to receive the next byte from the
microcontroller.
TX register simplified block diagram (before transmit)
TX register simplified block diagram (during transmit)
29
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 |
发布紧急采购，3分钟左右您将得到回复。