|The scope of application
|CH9121 datasheet. Realize transparent transmission between UART and Ethernet. It supports UART and network configuration. It has built-in PHY, and supports serial device to connect to the network.
|CH395 datasheet. TCP/IP Ethernet protocol stack chip, integrated 10/100M MAC and PHY transceiver, built-in DHCP, ARP, ICMP, IGMP, UDP and TCP protocol firmware, supports SPI/8-bit parallel port/asynchronous serial port and up to 8 sockets, supports MCU system to connect to Ethernet.