Overview
The CH397 is a highly integrated, low-power USB NIC chip with a built-in QingKe RISC-V processor, a high-speed USB controller and transceiver PHY compliant with the USB2.1 protocol specification, and an Ethernet MAC+PHY compliant with IEEE802.3 protocol specifications and supporting 10M/100M networks. The standard USB host interface is used to extend the Ethernet interface via USB.
Features
- Single-chip USB2.0/2.1 to 10/100M Fast Ethernet with integrated USB PHY and Ethernet MAC and Ethernet PHY
- Support CDC-ECM protocol and CDC-NCM protocol and RNDIS protocol, no driver installation or optional vendor driver
- Support 10Mbps and 100Mbps rates, IEEE 802.3 10BASE-T/100BASE-TX compatible
- Support 10M/100M Auto-Negotiation
- Built-in TX/RX packet buffering
- Support IPv4/IPv6 packet checksum, support IPv4 TCP/UDP/HEAD and IPv6 TCP/UDP packet checksum generation and inspection
- Support IEEE 802.3x flow control and half-duplex conflict pressure fallback flow control
- Support IEEE 802.3Q VLAN tagging
- Support Sleep mode and low-power Sleep mode, support network low-power configuration, support dynamic power management
- Support remote wake-up via events such as magic packets and network wake-up packets
- Support CAT5 UTP cable, CAT6 UTP cable, support 120m transmission distance
- Support Auto-MDIX exchange TX/RX, automatic identification of positive and negative signal lines
- Optional external SPI Flash, can update user configuration
- Support LED blinking frequency and duty cycle configuration
- Built-in linear Low-Dropout(LDO) regulator, single power supply
- Built-in 50Ω impedance matching resistor, built-in crystal oscillator capacitor required, peripheral circuitry streamlined
- Processor IP, controller and transceiver IP are all self-developed and tightly integrated, high efficiency and low cost, eliminating IP license fees
- 6KV enhanced ESD performance, Class 3A
- QFN24, QFN32 and other packages available