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参数资料
| 型号： | 4421-DKDB2 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 27/45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
17. Status Read Command
Bit
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
POR
0000h
The read command starts with a zero, whereas all other control commands start with a one. If a read command is identified, the
status bits will be clocked out on the SDO pin as follows:
Status Register Read Sequence with FIFO Read Example:
Bit Name
RGIT
FFIT
POR
RGUR
FFOV
WKUP
EXT
LBD
FFEM
ATS
RSSI
DQD
CRL
ATGL
OFFS(6)
OFFS(3) -OFFS(0)
Function
TX register is ready to receive the next byte (Can be cleared by Transmitter Register Write Command , page 24)
The number of data bits in the RX FIFO has reached the pre-programmed limit (Can be cleared by any of the
FIFO read methods)
Power-on reset (Cleared after Status Read Command )
TX register under run, register over write (Cleared after Status Read Command )
RX FIFO overflow (Cleared after Status Read Command )
Wake-up timer overflow (Cleared after Status Read Command )
Logic level on interrupt pin (pin 16) changed to low (Cleared after Status Read Command )
Low battery detect, the power supply voltage is below the pre-programmed limit
FIFO is empty
Antenna tuning circuit detected strong enough RF signal
The strength of the incoming signal is above the pre-programmed limit
Data quality detector output
Clock recovery locked
Toggling in each AFC cycle
MSB of the measured frequency offset (sign of the offset value)
Offset value to be added to the value of the frequency control parameter (Four LSB bits)
Note: 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
(page 21). The AFC offset value (OFFS bits in the status word) is represented as a two’s complement number. The actual
frequency offset can be calculated as the AFC offset value multiplied by the current PLL frequency step (see the Frequency
Setting Command on page 17).
27
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| 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 |
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| 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 |
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