FACE Modules:FM-POE

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FM-POE Module

FM-POE FACE Module incorporates 4 ports of GbE LAN supporting 10/100/1000BASE-T Ethernet connectivity, compliant with IEEE 802.3/u/ab standard. All four ports compliant with IEEE 802.3af* support PoE and PoE + PSE applications. Two additional USB2.0 downstream ports supporting data rates up to 480Mbps for general purpose connectivity.
Note that HW Rev1.0 supports PSE Class 0 (15.4W max) per port when 2 ports populated with PD Class 0 devices (12.95W max).
Refer to Compatibility Matrix for products fit.

Highlights

  • 4x GbE LAN 10/100/1000BASE-T compliant with IEEE 802.3/u/ab
  • 4x PSE ports compliant with IEEE 802.3af* PoE standard (see note above)
  • 2x USB2.0 downstream ports, up to 480Mbps half-duplex

Block Diagram

FM-POE.png


Hardware Specifications

The following section provides information about FM-POE main components and features.

Intel I211AT GbE Controller Intel Ethernet I211 controller is a single port, compact, low power component that supports GbE designs. The I211 offers a fully-integrated GbE Media Access Control (MAC), Physical Layer (PHY) port and supports PCI Express 2.1 (5GT/s). The I211 enables 1000BASE-T implementations using an integrated PHY. It can be used for server system configurations such as rack mounted or pedestal servers, in an add-on NIC or LAN on Motherboard (LOM) design. Another possible system configuration is for blade servers as a LOM or mezzanine card. It can also be used in embedded applications such as switch add-on cards and network appliances. One independent interface is used to connect the I211 port to external devices. The following protocol is supported: MDI (copper) support for standard IEEE 802.3 Ethernet interface for 1000BASE-T, 100BASE-TX, and 10BASE-T applications (802.3, 802.3u, and 802.3ab).

Main Features

  • PCIe v2.1 (5 GT/s) x1, with Switching Voltage Regulator (iSVR)
  • Integrated Non-Volatile Memory (iNVM)
  • Platform Power Efficiency
  • IEEE 802.3az Energy Efficient Ethernet (EEE)
  • Proxy: ECMA-393 and Windows logo for proxy offload
  • Jumbo frames
  • Interrupt moderation, VLAN support, IP checksum offload
  • RSS and MSI-X to lower CPU utilization in multi-core systems
  • Advanced cable diagnostics, auto MDI-X
  • ECC – error correcting memory in packet buffers
  • Four Software Definable Pins (SDPs)

Silicon Labs Si3452 Quad High Voltage Port Controller for PoE + PSE When connected directly to the host system or configured in Auto mode, each Si3452 high-voltage port controller provides all of the critical circuitry and sophisticated power measurement functionality for the high-voltage interfaces of four complete PSE ports. The Si3452 fully integrates robust, low-RON (0.3Ω typical) power MOSFET switches, low-power dissipation current sensing circuitry, and transient voltage surge suppression devices. The on-chip current sense circuitry and power MOSFETs provide programmable scaling of current limits to match PoE (350 mA, 15.4 W for 2 ports) and PoE+ (600 mA, 30 W for one port) power requirements on a per port basis. Each Si3452 also performs the IEEE-required powered device (PD) detection, classification, and disconnect functionality.
The flexible architecture enables powered device disconnect detection using Silicon Laboratories proprietary dV/dt disconnect sensing algorithm. dV/dt disconnect is an alternative to DC disconnect that requires no additional BOM components, does not dissipate extra device power, and fully interoperates with all powered devices. Also provided are multi-point detection algorithms and per-port current and voltage monitoring.
Intelligent protection circuitry includes power supply under voltage lockout (UVLO), port output current limiting and short-circuit protection, thermal overload sensing and port shutdown, and transient voltage surge suppressors capable of protecting the Si3452 from a variety of harsh surge events seen on the RJ-45 interface. To maximize system design flexibility and minimize cost, each Si3452 connects directly to a system host controller through an I2C serial interface.

Pericom PI6C20400 1-to-4 Differential Clock Driver Pericom Semiconductor's PI6C20400 is a high-speed, low-noise differential clock driver/buffer compatible with CML and HCSL differential I/O technology. The device distributes a differential input clock to four differential pairs of clock outputs either with or without PLL. The clock outputs are controlled by input selection of several static control signals and Host SMBus interface. The device oriented and designed for PCI Express applications.

SPI NOR Flash SPI Flash Reserved for pin compatible 82574L GbE device. The 82574L requires non-volatile memory content for initialization and configuration. The NVM is connected to a single Serial Peripheral Interface (SPI). The 82574L is compatible with many sizes of 4-wire SPI NVM devices. The required NVM size is dependent upon system requirements. FM-XTDE4U2/4 NVM is implemented with Winbond W25Q80BL 8Mbit Flash memory.

RJ45 PoE/PSE port pinout The connections of the RJ45 (8P8C) sockets of FM-PoE are compatible to the widely used TIA/EIA-568B standard, thus adequate to 1000BASE-T communication. The PoE connections to the RJ45 (8P8C) sockets are according to end-span (mode A) PoE IEEE802.3af.

Pin # 1000BASE-T signal PoE connection
1 DA+ GND Pair
2 DA-
3 DB+ -48V Pair
4 DC+
5 DC-
6 DB- -48V Pair
7 DD+
8 DD-


Safety Information
On every use of FM-POE to deliver Power over Ethernet, 12V power supply must be applied to the power jack on the front panel of FM-POE. The use of PoE with the power supplied via the system board back panel may result in permanent damage to the system.


Schematics

Layout

Mechanical

Assembly