CH9121 has Built-in TCP/IP protocol stack, which can provides serial data and network data’s two-way penetrate transparent. CH9121 has TCP-Client, TCP-Server and UDP 3 kinds of work mode, supports serial baud rate up to 921600bps, can be easily configured by host PC software. The application diagram for CH9121 is shown below:
- Built-in Ethernet MAC and PHY.
- Two-way penetrate transparent of serial data and network data.
- Supports 10 / 100M, full duplex / half duplex adaptive Ethernet interface, fully compatible with IEEE 802.3 protocol.
- Auto MDI/MDIX switching.
- Supports 3 kinds of work mode: TCP-Client, TCP-Server and UDP.
- Supports serial baud rate from 300bps to 921600bps.
- TTL logic level, compatible with 3.3V and 5V.
- Serial port supports both full duplex and half duplex, supports RS485 auto direction control.
- Work mode, port, Ethernet configurations can be set by host PC software.
- Virtual Serial Port Supported.