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SI4432 参数 Datasheet PDF下载

SI4432图片预览
型号: SI4432
PDF下载: 下载PDF文件 查看货源
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分类和应用: 电子手机电话
文件页数/大小: 74 页 / 875 K
品牌: IBM [ IBM ]
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Si4430/31/32-B1  
3.5.7. 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 kbps:  
txdr15:0  1 MHz  
DR_TX (kbps) = ---------------------------------------------------  
216 + 5 txdtrtscale  
DR_TX(kbps) 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  
6F R/W  
TX Data Rate 1  
TX Data Rate 0  
txdr[15] txdr[14] txdr[13] txdr[12] txdr[11] txdr[10] txdr[9] txdr[8]  
0Ah  
3Dh  
txdr[7]  
txdr[6] txdr[5] txdr[4]  
txdr[3]  
txdr[2] txdr[1] txdr[0]  
Rev 1.0  
31  
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