Product Description: Chip:ENC28J60-I/SO. the board 25MHZ crystal. the network interface board HR911105A. 3.3 V power supply pin.Debug reminder: 1, the IP address of the computer to a network segment and module such as IP module 192.168.1.2, IP computer set: 192.168.1.3; 192.168.1 is the 3 section; 2, cross the network cable connected to the mouth of the computer network module and mouth; (that is, the cable network 1 3,2 cross, and then do not understand that there are pictures Baidu); 3, the module and the MCU connection should pay attention to the connection of each line is reliable (the surface is not even connected to the good); 4, and the MCU port IO to confirm that is right; 5, the program recompile, download, confirm whether to download! STM32 and 51 IOWiring instructions: ############STM32 connection ########## STM32f103VBT6 ENC28J60 module or other stm32 PC10----------- RESET PC12--------- CS //PC12 pull-up output mode //SPI1- PA5----------- SCK / / output mode PA6----------- SO / / input mode PA7----------- SI / / output mode ######51 microcontroller ########### //--------------------------------- Change IP address and MAC address in uipopt.h 192.168.1.100 //--------------------------------- port configuration in spi.h. STC12C5A60S2 DIP OSC:18.432Msbit CSN = P1^0; / / 28J60-- CS (SS) Sbit SIN = P1^1; / / MOSI Sbit SON = P1^2; / / MISO Sbit SCKN = P1^3; / / SCK Sbit RSTN = P1^4; / / RST Sbit INTN = P3^3; / / INTPackage Included: 1*ENC28J60 Ethernet LAN Network ModuleDocument Link for ENC28J60 Ethernet LAN Network Module:http://www.filedropper.com/en28j60ethernetmodule