W5500 数据手册 V1.3 3 / 74
目 录
1 引脚分配 ..................................................................... 3
1.1 引脚描述 ................................................................. 3
2 主机接口 ..................................................................... 8
2.1 SPI 工作模式 ............................................................. 9
2.2 SPI 数据帧 ............................................................... 2
2.2.1 地址段 ............................................................ 2
2.2.2 控制段 ............................................................ 3
2.2.3 数据段 ............................................................ 5
2.3 可变数据长度模式（VDM）Variable Length Data Mode (VDM)..................... 2
2.3.1 写访问—VDM 模式 ................................................... 2
2.3.2 读访问—VDM 模式 ................................................... 2
2.4 固定数据长度模式（FDM）Fixed Length Data Mode (FDM) ....................... 2
2.4.1 写访问—FDM 模式 Write Access in FDM ................................ 2
2.4.2 读访问—FDM 模式 Read Access in FDM ................................. 2
3 寄存器和内存构成 Register and Memory Organization ............................. 2
3.1 通用寄存器区 Common Register Block ........................................ 2
3.2 Socket 寄存器区 Socket Register Block ..................................... 2
3.3 内存 Memory .............................................................. 3
4 寄存器描述 Register Descriptions.............................................. 4
4.1 通用寄存器 Common Registers .............................................. 4
4.2 Socket 端口寄存器 Socket Registers ......................................... 2
5 电气规范 .................................................................... 16
5.1 绝对最大额定值 .......................................................... 16
5.2 绝对最大额定值 (电气灵敏度) ............................................. 16
5.3 直流特性 ................................................................ 18
5.4 功耗 Power Dissipation .................................................. 19
5.5 交流特性 ................................................................ 19
5.5.1 复位时钟.......................................................... 19
5.5.2 唤醒时间.......................................................... 19
5.5.3 晶体特性.......................................................... 20
5.5.4 SPI 时钟 .......................................................... 20
5.5.5 变压器特性 ........................................................ 21
5.5.6 极性变换 MDIX ..................................................... 22
6 封装描述 .................................................................... 23
文档历史信息 .................................................................. 24
