Preliminary Si3933
目录
1 概述.......................................................................................................................................................................4
1.1 主要特征........................................................................................................................................................4
1.2 应用范围........................................................................................................................................................4
1.3 典型应用原理图............................................................................................................................................5
2 结构框图...............................................................................................................................................................7
3 引脚信息...............................................................................................................................................................7
3.1 TSSOP-16 封装.............................................................................................................................................. 7
3.2 QFN-16 封装.................................................................................................................................................. 8
4 电气特性...............................................................................................................................................................9
4.1 极限参数........................................................................................................................................................9
4.2 工作条件........................................................................................................................................................9
4.3 DC/AC 参数................................................................................................................................................. 10
4.4 电气参数......................................................................................................................................................10
5 工作模式.............................................................................................................................................................13
5.1 监听模式......................................................................................................................................................13
5.2 人工唤醒......................................................................................................................................................14
5.3 前导码检测/向量校验.................................................................................................................................14
5.4 数据接收......................................................................................................................................................15
6 寄存器和 SPI..................................................................................................................................................... 15
6.1 寄存器..........................................................................................................................................................15
6.2 SPI.................................................................................................................................................................17
6.2.1 SDI
命令结构
........................................................................................................................................ 18
6.2.2
写入模式
.............................................................................................................................................. 19
6.2.3
读取模式
.............................................................................................................................................. 20
6.2.4 SDI
时序
................................................................................................................................................ 20
7 通道放大器.........................................................................................................................................................21
7.1 频率检测......................................................................................................................................................21
7.2 RSSI 计算..................................................................................................................................................... 22
8 解调和数据分割.................................................................................................................................................24
9 唤醒规则和曼彻斯特解码.................................................................................................................................26
9.1 唤醒规则......................................................................................................................................................26
9.2 校验器..........................................................................................................................................................28
9.3 错误唤醒寄存器..........................................................................................................................................29
9.4 曼彻斯特解码和时钟恢复.......................................................................................................................... 29
10 时钟产生电路...................................................................................................................................................30