PCIe 3.1 Ethernet bridges save power in embedded, automotive platforms

February 15, 2019 //By Julien Happich
PCIe 3.1 Ethernet bridges save power in embedded, automotive platforms
Microchip Technology’s LAN7430/1 Ethernet bridge provides new options for embedded and automotive platform designers who are seeking Peripheral Component Interconnect Express (PCIe) 3.1 Low-Power Sub-State (LPSS) L1.1 and L1.2 for power savings.

The LAN7430 provides integrated power, clocks and an Ethernet physical (PHY) interface while the LAN7431 provides Reduced Gigabit Media-Independent Interface (RGMII) for alternative PHYs and switches. The LPSS L1.1 (snooze) and L1.2 (off) enable designers to reduce power consumption and improve battery life by snoozing or turning off the high-speed circuits in the PHY when not in use.

When connected to an application SoC or processor as host, the LAN7430/1 allows the host device to deliver audio, data or video data through the 10/100/1000 Ethernet network. Connection to the host is achieved via the PCIe 3.1 specification, providing up to 2.5 Gigatransfers per second in each direction simultaneously.

The LAN7431 offers an automotive variant that exceeds AEC-Q100 Grade 2 (-40 to +105°C) qualification. The LAN7430/1 family operates from a single 3.3V supply, removing the need for complex and costly power management support. Both devices integrate a JTAG (1149.1) Test Access Port (TAP) for enhanced test coverage.

Microchip - www.microchip.com

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