LAN9352/ML

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LAN9352/ML Interface - Controllers Application Field and Working Principle

The Microchip LAN9352/ML is a general-purpose, single-chip 802.3-compliant controller with integrated 3-port Ethernet switch, providing a very cost-effective, low-power solution for embedded applications. It can be used to provide integrated power over Ethernet (PoE) and quality of service (QoS) capabilities to small form-factor network-connected devices.

Applications

The Microchip LAN9352/ML controller is designed for a wide range of embedded applications, such as home gateways, set-top boxes, industrial automation, printers, and other consumer and industrial Ethernet devices. The integrated 3-port Ethernet switch and integrated PoE support make it ideal for applications in which multiple Ethernet devices need to be interconnected.

The LAN9352/ML offers support for a variety of communication protocols, including Gigabit Ethernet, 10BASE-T, 100BASE-TX, 1000BASE-T, 10GBASE-T, and 10GBASE-CX4. It also provides support for advanced network security protocols, such as MAC address filtering, port-based VLANs, 802.1x, and RADIUS.

Working Principle

The LAN9352/ML controller is a full speed, single-chip solution that uses a 32-bit ARM Cortex-M0+ microcontroller. It incorporates an integrated Ethernet switch core and a PHY layer. The Ethernet switch core allows multiple physical ports and virtual LANs (VLANs) to be connected and routed. The PHY layer provides MAC- and PHY-layer functionality for Gigabit Ethernet, 10BASE-T, and Fast Ethernet networks.

The controller also uses a high-speed direct memory access (DMA) engine to enable fast data throughput. This DMA engine allows the controller to move data between the MACs, switch core, and external memory, without burdening the CPU. Furthermore, the controller incorporates an SPI-interface controller to provide access to external memory. The SPI-interface controller is capable of transferring data at rates up to 10Mb/s.

In addition to the integrated MACs and switch core, the LAN9352/ML controller includes power management circuitry, IEEE 802.3af/at/bt compliant PoE PD control, and integrated timer and watchdog functions. The power management circuitry is able to provide up to 15W of power over the PoE interface. The IEEE 802.3af/at/bt compliant PD control provides the ability to automatically detect the presence of a PoE device and supply the appropriate voltage and power to the device.

The LAN9352/ML controller is fully supported by the Microchip LAN9352/ML software development kit (SDK), which provides a comprehensive set of development tools and software libraries for designing, developing, and deploying applications quickly and easily. This SDK includes support for the most popular Ethernet standards, such as Gigabit Ethernet, 10BASE-T, 100BASE-TX, 1000BASE-T, 10GBASE-T, and 10GBASE-CX4. It also provides access to a wide range of software IP, such as network stacks, protocol stacks, and drivers.

Conclusion

The Microchip LAN9352/ML controller is a highly integrated, low-power solution for embedded applications. It incorporates an integrated 3-port Ethernet switch, as well as an integrated PoE power management subsystem. The controller is fully supported by a comprehensive development kit, which provides access to a wide range of software IP, such as network stacks, protocol stacks, and drivers. With its ability to support a variety of network protocols and its integrated power management capabilities, the LAN9352/ML is the ideal solution for embedded applications requiring high-speed, low-power Ethernet communication.

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