4.5 低功耗 SNIFF 模式 .................................................................................................................. 42
4.5 低功耗 SNIFF 模式 .................................................................................................................. 43
4.5.1 SNIFF 模式 ............................................................................................................................. 43
4.5.2 低占空比 SNIFF 模式 .......................................................................................................... 44
4.7.1 估算第一条路径的信号功率 ............................................................................................ 45
4.7.2 估算接收信号功率 .............................................................................................................. 46
5 Media Access Control (MAC) hardware features ............................................................................... 47
5.1 循环冗余校验 .................................................................................................................................... 47
5.2 帧过滤 .................................................................................................................................................. 47
5.2.1 帧过滤规则 ..................................................................................................................................... 48
5.2.2 帧过滤注意事项 ................................................................................................................... 49
5.3 自动确认 ............................................................................................................................................. 49
5.3.2 自动接收器重新启用 .......................................................................................................... 51
5.3.3 自动 ACK 周转时间 ............................................................................................................. 51
5.3.4 帧挂起位 Frame Pending bit ........................................................................................... 51
5.3.5 主机通知 ................................................................................................................................. 51
5.4 发送并自动等待响应 ...................................................................................................................... 52
6 DW1000 的其他功能 ................................................................................................................................... 52
6.1 外部同步 ............................................................................................................................................. 52
6.1.1 一次性时基复位(OSTR)模式 ...................................................................................... 52
6.1.2 单发发送同步(OSTS)模式 .......................................................................................... 53
6.1.3 一次接收同步(OSRS)模式 .......................................................................................... 53
6.2 外部功率放大 .................................................................................................................................... 55
6.3 使用片上 OTP 存储器 ..................................................................................................................... 55
6.3.1 OTP 存储器映射 .................................................................................................................. 55
6.3.2 将值编程到 OTP 存储器中 ............................................................................................... 57
6.3.3 从 OTP 内存中读取一个值 ............................................................................................... 58
6.4 测量 IC 温度和电压 ......................................................................................................................... 58
10 附录 1:IEEE 802.15.4 UWB 物理层 ..................................................................................................... 59
10.1 框架结构概述 .................................................................................................................................. 59
10.2 数据调制方案 .................................................................................................................................. 59
10.3 同步头调制方案 ............................................................................................................................. 60
10.4 PHY 头 ............................................................................................................................................... 61
10.5 UWB 信道和前导码 ....................................................................................................................... 62
10.6 标准的其他细节 ............................................................................................................................. 62
11 附录 2:IEEE 802.15.4 MAC 层 .............................................................................................................. 62
11.1 一般 MAC 消息格式 ...................................................................................................................... 63
11.2 MAC 报头中的帧控制字段 ......................................................................................................... 63
11.2.1 帧类型字段 Frame type field ......................................................................................... 64
11.2.2 启用安全性字段 Security enabled Field .................................................................... 64
11.2.3 帧未决字段 Frame pending field ................................................................................. 64
11.2.4 确认请求字段 Acknowledgement request field ..................................................... 65
11.2.5 PAN ID 压缩字段 PAN ID compression field ........................................................... 65
11.2.6 目标寻址模式字段 Destination addressing mode field ....................................... 65
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