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SI1003 参数 Datasheet PDF下载

SI1003图片预览
型号: SI1003
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  
Frequency Correction  
RX TX  
Freq Offset Register Freq Offset Register  
AFC Freq Offset Register  
AFC disabled  
AFC enabled  
23.3.8. TX Data Rate Generator  
The data rate is configurable between 0.123–256 kbps. For data rates below 30 kbps the ”txdtrtscale” bit in  
register 70h should be set to 1. When higher data rates are used this bit should be set to 0.  
The TX date rate is determined by the following formula in bps:  
txdr15:0  1 MHz  
DR_TX (bps) = -------------------------------------------------  
216 + 5 txdtrtscale  
DR_TX(bps) 216 + 5 txdtrtscale  
txdr[15:0] = --------------------------------------------------------------------------------  
1 MHz  
For data rates higher than 100 kbps, Register 58h should be changed from its default of 80h to C0h. Non-  
optimal modulation and increased eye closure will result if this setting is not made for data rates higher  
than 100 kbps. The txdr register is only applicable to TX mode and does not need to be programmed for  
RX mode. The RX bandwidth which is partly determined from the data rate is programmed separately.  
D7  
D6  
D5  
D4  
D3  
D2  
D1  
D0  
POR Def.  
Add R/W  
Function/  
Description  
6E R/W TX Data Rate 1 txdr[15] txdr[14] txdr[13] txdr[12] txdr[11] txdr[10] txdr[9] txdr[8]  
0Ah  
3Dh  
6F R/W TX Data Rate 0 txdr[7]  
txdr[6] txdr[5] txdr[4] txdr[3]  
txdr[2] txdr[1] txdr[0]  
23.4. Modulation Options  
23.4.1. Modulation Type  
The EZRadioPRO transceivers support three different modulation options: Gaussian Frequency Shift Key-  
ing (GFSK), Frequency Shift Keying (FSK), and On-Off Keying (OOK). GFSK is the recommended modu-  
lation type as it provides the best performance and cleanest modulation spectrum. Figure 23.6  
demonstrates the difference between FSK and GFSK for a Data Rate of 64 kbps. The time domain plots  
demonstrate the effects of the Gaussian filtering. The frequency domain plots demonstrate the spectral  
benefit of GFSK over FSK. The type of modulation is selected with the modtyp[1:0] bits in "Register 71h.  
Modulation Mode Control 2". Note that it is also possible to obtain an unmodulated carrier signal by setting  
modtyp[1:0] = 00.  
modtyp[1:0]  
Modulation Source  
00  
01  
10  
11  
Unmodulated Carrier  
OOK  
FSK  
GFSK (enable TX Data CLK when direct mode is used)  
Rev. 1.0  
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