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SI1002-C-GM 参数 Datasheet PDF下载

SI1002-C-GM图片预览
型号: SI1002-C-GM
PDF下载: 下载PDF文件 查看货源
内容描述: 超低功耗, 64/32 KB , 10位ADC, MCU ,集成了240-960兆赫的EZRadioPRO收发器 [Ultra Low Power, 64/32 kB, 10-Bit ADC MCU with Integrated 240-960 MHz EZRadioPRO Transceiver]
分类和应用:
文件页数/大小: 376 页 / 2369 K
品牌: SILICON [ SILICON ]
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Si1000/1/2/3/4/5  
an incorrect error may rarely occur. The RSSI value may be incorrect if read during the update period. The  
update period is approximately 10 ns every 4 Tb. For 10 kbps, this would result in a 1 in 40,000 probability  
that the RSSI may be read incorrectly. This probability is extremely low, but to avoid this, one of the follow-  
ing options is recommended: majority polling, reading the RSSI value within 1 Tb of the RSSI interrupt, or  
using the RSSI threshold described in the next paragraph for Clear Channel Assessment (CCA).  
D7  
D6  
D5  
D4  
D3  
D2  
D1  
D0  
POR  
Def.  
Add R/W  
Function/Description  
26  
27  
R
Received Signal Strength Indicator  
rssi[7]  
rssi[6]  
rssi[5]  
rssi[4]  
rssi[3]  
rssi[2]  
rssi[1]  
rssi[0]  
R/W RSSI Threshold for Clear Channel Indicator rssith[7] rssith[6] rssith[5] rssith[4] rssith[3] rssith[2] rssith[1] rssith[0]  
00h  
For CCA, threshold is programmed into rssith[7:0] in "Register 27h. RSSI Threshold for Clear Channel  
Indicator." After the RSSI is evaluated in the preamble, a decision is made if the signal strength on this  
channel is above or below the threshold. If the signal strength is above the programmed threshold then the  
RSSI status bit, irssi, in "Register 04h. Interrupt/Status 2" will be set to 1. The RSSI status can also be  
routed to a GPIO line by configuring the GPIO configuration register to GPIOx[3:0] = 1110.  
RSSI vs Input Power  
250  
200  
150  
100  
50  
0
-120  
-100  
-80  
-60  
-40  
-20  
0
20  
In Pow [dBm]  
Figure 23.25. RSSI Value vs. Input Power  
23.9. Reference Design  
Reference designs are available at www.silabs.com for many common applications which include recom-  
mended schematics, BOM, and layout. TX matching component values for the different frequency bands  
can be found in the application notes “AN435: Si4032/4432 PA Matching” and “AN436:  
Si4030/4031/4430/4431 PA Matching.” RX matching component values for different frequency bands can  
be found in “AN427: EZRadioPRO Si433x and Si443x RX LNA Matching.”  
280  
Rev. 1.0