Product Description:USR-ES1 is the Ethernet module of a SPI interface, interface is TTL level of 3.3V, power supply voltage of +3.3V, please ensure that the current is not less than 200mA, voltage is continuous and stable +3.3V.Function features:High speed SPI interface 80MHzHardware-TCPIP-protocol stack user built in, almost without understanding the complex network protocol knowledgeSupports up to 8 SocketSupport TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE protocolIntegration of the data link layer, physical layerSupport the wakeupSupport high speed serial peripheral interface (SPI model 0, 3)Internal 32K bytes receive bufferThe embedded 10BaseT/100BaseTX Ethernet physical layer (PHY)Support auto negotiation (10/100-Based full duplex or half duplex)Does not support the IP patchThe working voltage of 3.3V, I/O and 5V voltage signalLED display (full duplex or half duplex, network connection, network speed,active)Pin type package ultra small, convenient for embedded applicationsApplication of C sample projectProduct characters:Power supply mode:3.3V external power supply, current should be more than 200mA;Control interface:The TTL level, 3.3V SPI interface;PCB size:23 * 25 mm;Mechanical Dimensions:28.5 * 23 * 24;