参考系统：利用 GPIO 实现以太网 PHY 寄存器访问 Application Note: Ethernet PHY Register Access With GPIO R Reference System: Ethernet PHY Register Access With GPIO Author: Brian Hill XAPP1042 (v1.0) April 3, 2008 Abstract The XPS Ethernetlite peripheral does not provide any mechanism to access the Ethernet PHY registers. These registers are used to configure auto negotiation parameters and to obtain PHY status. This application note provides reference systems and ……