CH9121 Datasheet | Unknown Manufacturer

Overview CH9121 is a chip realizing transparent transmission between network and UART. It integrates TCP/IP protocol stack, which can realize bidirectional transparent transmission between network data packets and serial data. It has 4 working modes: TCP CLIENT, TCP SERVER, UDP CLIENT and UDP SERVER. The serial baud rate can be up to 921600bps. It can be easily configured by upper puter software or serial mands, which is convenient and quick. The figure below is a general application block diagram of CH9121. User TXD=>RXD device, RXD<=TXD such as UART MCU, embedded systems, etc. UART IP ARP UDP IGMP ICMP TCP 10/100M MAC/PHY TXP TXN RXP RXN Ethernet puter industrial puter, and other devices 2. Features - Internal Ethernet MAC layer and PHY layer - Realize bidirectional transparent transmission between serial data and network data - Support 10/100M, full/half duplex self-adaption Ethernet interface, patible with 802.3 protocol - Support automatic MDI/MDIX line conversion - Support DHCP automatic access to IP address, and DNS domain name access - Set the chip working mode, port, IP and other network parameters through upper puter software and serial mands - Support four working modes: TCP CLIENT, TCP SERVER, UDP CLIENT and UDP SERVER - Support up to two independent UARTs, independent transparent transmission - Serial baud rate supports 300bps ~ 921600bps - Serial TTL level, patible with 3.3V and 5V - UART supports full-duplex and half-duplex serial munication, and RS485 transceiving automatic switch - Support and provide virtual serial software - Support KEEPALIVE mechanism CH9121 Datasheet 3. Package 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 VCC18 VCC33 NC NC CFG0 RESET TXD1 RXD1 TXD2 RXD2 VCC18 LINK# ACT# DIR1 NC NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 RSETE VCC33 GND RXP RXN VCC18 TXP TXN GND XI XO VCC33 GND NC NC...