- 您现在的位置：买卖IC网 > PDF目录21903 > 4430-T-B1 D 950 (Silicon Laboratories Inc)KIT DEV TEST EZRADIOPRO SI4430 PDF资料下载
参数资料
| 型号： | 4430-T-B1 D 950 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 27/47页 |
| 文件大小： | 799K |
| 描述： | KIT DEV TEST EZRADIOPRO SI4430 |
| 标准包装： | 1 |
| 附件类型： | 测试卡，收发器，950MHz |
| 适用于相关产品： | EZRadioPRO? |
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页当前第27页第28页第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页第46页第47页
Si4430/31/32-B1
Rev 1.1
27
3.5.2. Easy Frequency Programming for FHSS
While Registers 73h77h may be used to program the carrier frequency of the Si4430/31/32, it is often easier to
think in terms of channels or channel numbers rather than an absolute frequency value in Hz. Also, there may
be some timing-critical applications (such as for Frequency Hopping Systems) in which it is desirable to change
frequency by programming a single register. Once the channel step size is set, the frequency may be changed by
a single register corresponding to the channel number. A nominal frequency is first set using Registers 73h77h,
as described above. Registers 79h and 7Ah are then used to set a channel step size and channel number, relative
to the nominal setting. The Frequency Hopping Step Size (fhs[7:0]) is set in increments of 10 kHz with a maximum
channel step size of 2.56 MHz. The Frequency Hopping Channel Select Register then selects channels based on
multiples of the step size.
For example, if the nominal frequency is set to 900 MHz using Registers 73h77h, the channel step size is set to
1 MHz using "Register 7Ah. Frequency Hopping Step Size," and "Register 79h. Frequency Hopping Channel
Select" is set to 5d, the resulting carrier frequency would be 905 MHz. Once the nominal frequency and channel
step size are programmed in the registers, it is only necessary to program the fhch[7:0] register in order to change
the frequency.
3.5.3. Automatic State Transition for Frequency Change
If registers 79h or 7Ah are changed in either TX or mode, the state machine will automatically transition the chip
back to TUNE, change the frequency, and automatically go back to either TX or RX. This feature is useful to reduce
the number of SPI commands required in a Frequency Hopping System. This in turn reduces microcontroller
activity, reducing current consumption. The exception to this is during TX FIFO mode. If a frequency change is
initiated during a TX packet, then the part will complete the current TX packet and will only change the frequency
for subsequent packets.
3.5.4. Frequency Deviation
The peak frequency deviation is configurable from ?.625 to ?20 kHz. The Frequency Deviation (攆) is controlled
by the Frequency Deviation Register (fd), address 71 and 72h, and is independent of the carrier frequency setting.
When enabled, regardless of the setting of the hbsel bit (high band or low band), the resolution of the frequency
deviation will remain in increments of 625 Hz. When using frequency modulation the carrier frequency will deviate
from the nominal center channel carrier frequency by 睌f:
Add R/W Function/Description
D7
D6
D5
D4
D3
D2
D1
D0
POR Def.
79 R/W Frequency Hopping Channel
Select
fhch[7] fhch[6] fhch[5] fhch[4] fhch[3] fhch[2] fhch[1] fhch[0]
00h
7A R/W
Frequency Hopping Step
Size
fhs[7]
fhs[6]
fhs[5]
fhs[4]
fhs[3]
fhs[2]
fhs[1]
fhs[0]
00h
)
10
]
0
:
7
[
(
]
0
:
7
[
kHz
fhch
fhs
Fnom
rr r
Hz
f
d
625
]
0
:
8
[
D
=
Df
peak deviation
=
Hz
fd
f
625
]
0
:
8
[
相关PDF资料 |
PDF描述 |
|---|---|
| B82432X2 | KIT INDUCTOR 1812-C SERIES |
| XPGWHT-L1-0000-00BE8 | LED WARM WHITE 2700K SMD |
| B82422X100 | KIT INDUCTOR 1210-A SERIES |
| B82422X1 | KIT INDUCTOR 1210-T SERIES |
| B82559X1 | KIT INDUCTOR POWER 82559 SERIES |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 4431 | 制造商:Thomas & Betts 功能描述:TRIPLE HEX DIE 制造商:Thomas & Betts 功能描述:Triple Hex Die |
| 4431.1001 | 功能描述:摇臂开关与扳钮开关 UV PROTECTION SWITCH Rocker, 230V 50HZ RoHS:否 制造商:C&K Components 触点形式: 开关功能: 电流额定值:50 mA 电压额定值 AC: 电压额定值 DC:30 V 功率额定值: 端接类型: 执行器:Paddle 颜色: 安装风格:Panel 端子密封: 触点电镀: 照明:Not Illuminated 照明颜色: |
| 4431.1002 | 功能描述:摇臂开关与扳钮开关 UV PROTECTION SWITCH Rocker, 115V 50HZ RoHS:否 制造商:C&K Components 触点形式: 开关功能: 电流额定值:50 mA 电压额定值 AC: 电压额定值 DC:30 V 功率额定值: 端接类型: 执行器:Paddle 颜色: 安装风格:Panel 端子密封: 触点电镀: 照明:Not Illuminated 照明颜色: |
| 4431.1003 | 功能描述:摇臂开关与扳钮开关 UV PROTECTION SWITCH Rocker, 120V 60HZ RoHS:否 制造商:C&K Components 触点形式: 开关功能: 电流额定值:50 mA 电压额定值 AC: 电压额定值 DC:30 V 功率额定值: 端接类型: 执行器:Paddle 颜色: 安装风格:Panel 端子密封: 触点电镀: 照明:Not Illuminated 照明颜色: |
| 4431.1004 | 功能描述:摇臂开关与扳钮开关 UV PROTECTION SWITCH Rocker, 230V 50HZ RoHS:否 制造商:C&K Components 触点形式: 开关功能: 电流额定值:50 mA 电压额定值 AC: 电压额定值 DC:30 V 功率额定值: 端接类型: 执行器:Paddle 颜色: 安装风格:Panel 端子密封: 触点电镀: 照明:Not Illuminated 照明颜色: |
发布紧急采购，3分钟左右您将得到回复。