LAN743x Low-Power Ethernet Bridges

By Microchip Technology 114

LAN743x Low-Power Ethernet Bridges

The LAN743x from Microchip Technology is a PCIe 3.1 (at 2.5GT/s) to reduced gigabit media independent interface (RGMII) gigabit Ethernet bridge providing an ultra-high-performance and cost-effective PCIe-to-Ethernet connectivity solution. LAN7431 contains an integrated RGMII interface, PCIe PHY, PCIe endpoint controller, 10 Gigabit / 100 Gigabit / 1000 Gigabit Ethernet MAC, Integrated OTP, JTAG TAP, and EEPROM controller. PCIe-based networking provides flexibility for the routing and placement of network connections anywhere in the system. Specific enhancements for PCIe LPSS L1.1 and LPSS L1.2 have been integrated to lower system power consumption.

LAN7431 is available with a wide range of drivers including Windows®, Linux®, and Pseudo Code for development towards RTOS. LAN743x also supports precision time protocol using industry standard 1588-2008 PTP. GPIOs are provided that can be software-defined for this function. Included within this feature is a programmable timer compare output that can also be software configured. The device contains all needed voltage regulators and requires only a single 3v3 supply. Further BOM savings can be realized through the integrated clock tree only requiring one external crystal or clock source. An EEPROM interface is provided although is not mandatory - an integrated OTP memory can provide for configuration data, further reducing system design cost and burden. Multiple power management features are provided, including various low-power modes and Link Status Change wake events. These wake events can be programmed to initiate a PCIe beacon, and if desired, also generate a hardware PME event. The device is available in commercial (0°C to 70°C) and industrial temperature range (-40°C to 85°C) and automotive grade 2 (-40°C to 105°C)

  • Single-chip, PCIe 3.1 at 2.5GT/s MII / RGMII network controller
    • PCIe low power sub-state LPSS L1.1 (snooze) and L1.2 (off)
    • Requires only a single 25 MHz crystal or single-ended clock
    • 9K jumbo frames are supported
    • Internal OTP memory to remove the need for external EEPROM
    • RGMII v1.3, v2.0 with the option for programmable delay
    • Variable IO power supplies in the range of 1.8 V to 3.3 V
  • IEEE 1588-2008 precision time protocol
    • IEEE 1588-2008 E2E and P2P one- and two-step supported
    • IEEE 1588-2008 programmable time compare output (Eg: 1PPS)
  • Comprehensive driver support
    • Windows OneCore with WHQL certification
    • Linux driver in mainline kernel
  • Automotive infotainment/telematics
  • PCIe to Gigabit Ethernet adapters/bridges
  • PCIe to Gigabit Ethernet on embedded systems
  • Gigabit backplanes
  • LTE modems
  • Networked cameras
  • Industrial PCs (IPC)
  • Test instrumentation, industrial