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参数资料
| 型号： | 4021-DKDB13 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 14/34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，868MHz，915MHz |
| 适用于相关产品： | EZRadio? |
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Si4021
14
2. Power Management Command
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
a1 a0 ex es ea eb et dc
C000h
Bits 5-0, enable the corresponding block of the transmitters, i.e. the crystal oscillator is enabled by the ex bit, the synthesizer by es, the
power amplifier by ea and the low battery detector by eb, while the wake-up timer by et. The bit dc disables the clock output buffer.
When receiving the Data Transmit Command, the chip supports automatic on/off control over the crystal oscillator, the PLL and the PA.
If bit a1 is set, the crystal oscillator and the synthesizer are controlled automatically. Data Transmit Command starts up the crystal oscillator
and as soon as a stable reference frequency is available the synthesizer starts. After a subsequent delay to allow locking of the PLL, if a0 is
set the power amplifier is turned on as well.
Note:
? To enable the automatic internal control of the crystal oscillator, the synthesizer and the power amplifier, the corresponding bits
(ex, es, ea) must be zero in the Power Management Command.
? In microcontroller mode, the ex bit should be set in the Power Management Command for the correct control of es and ea. The
oscillator can be switched off by clearing the ex bit after the transmission.
? In EEPROM operation mode after an identified Data Transmit Command the internal logic switches on the synthesizer and PA. At
the end of Data Transmit Command header if necessary the current clock cycle is automatically extended to ensure the PLL
stabilization and RF power ramp-up.
? In EEPROM operation mode the internal logic switches off the PA when the given number of bytes is transmitted. (See: Data
Transmit Command in EEPROM operation.)
? When the chip is controlled by a microcontroller, the Sleep Command can be used to indicate the end of the data transmission
process, because in microcontroller mode the Data Transmit Command does not contain the length of the TX data.
? For processing the events caused by the peripheral blocks (POR, LBD, wake-up timer, push-buttons) the chip requires operation of
the crystal oscillator. This operation is fully controlled internally, independently from the status of the ex bit, but if the dc bit is zero,
the oscillator remains active until Sleep Command is issued. (This command can be considered as an event controller reset.)
Oscillator control logic
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 4021-DKDB14 | 功能描述:射频开发工具 Test Board 50 Ohm Tx (434MHz) 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-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 |
| 4021-G | 功能描述:4021 ELARA MOON MODULE GREEN RoHS:是 类别:光电元件 >> LED - 高亮度电源模块 系列:4021 ELRA MOON 标准包装:36 系列:5027 TFFC STAR K2 颜色:暖白色 配置:星形 在特定电流下的光通量 - 测试:75lm 电流 - 测试:350mA 电流 - 最大:1.5A 带连接器:无 驱动器电路:无 波长:- 电压:- |
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