SMSC LAN9514 USB集线器和以太网控制方案

　　SMSC 公司的LAN9514 是集成了10/100以太网控制器的高性能高速USB 2.0集线器,包括了USB 2.0集线器,四个下游USB 2.0 PHY,一个上游USB 2.0 PHY,一个10/100以太网PHY,一个10/100以太网控制器,一个TAP控制器和一个EEPROM控制器。LAN9514 USB集线器能提供30多个可编程的特性,目标应用在台式和笔记本电脑,打印机,游戏机,嵌入式系统和坞站。本文介绍了LAN9514主要特性,器件亮点和主要优势,方框图以及采用USB电源开关和多晶硅熔丝的端口电源控制框图, EVB9514 评估板方框图和详细电路图和所用材料清单(BOM)。

　　USB Hub with Integrated 10/100 Ethernet Controller

　　The LAN9514 is a high performance Hi-Speed USB 2.0 hub with a 10/100 Ethernet controller. With applications ranging from embedded systems, desktop PCs, notebook PCs, printers, game consoles, and docking stations, the LAN9514 is targeted as a high performance, low cost USB/Ethernet and USB/USB connectivity solution.

　　The LAN9514 contains an integrated USB 2.0 hub, four integrated downstream USB 2.0 PHYs, an integrated upstream USB 2.0 PHY, a 10/100 Ethernet PHY, a 10/100 Ethernet Controller, a TAP controller, and a EEPROM controller.

　　The LAN9514 hub provides over 30 programmable features, including:

　　PortMap (also referred to as port remap) which provides flexible port mapping and disabling sequences. The downstream ports of the LAN9514 hub can be reordered or disabled in any sequence to support multiple platform designs’ with minimum effort. For any port that is disabled, the LAN9514 automatically reorders the remaining ports to match the USB host controller’s port numbering scheme.

　　PortSwap which adds per-port programmability to USB differential-pair pin locations. PortSwap allows direct alignment of USB signals (D+/D-) to connectors avoiding uneven trace length or crossing of the USB differential signals on the PCB.

　　PHYBoost which enables four programmable levels of USB signal drive strength in USB port transceivers. PHYBoost attempts to restore USB signal integrity that has been compromised by system level variables such as poor PCB layout, long cables, etc..

　　LAN9514 亮点:

　　Four downstream ports, one upstream port

　　Four integrated downstream USB 2.0 PHYs

　　One integrated upstream USB 2.0 PHY

　　Integrated 10/100 Ethernet MAC with full-duplex support

　　Integrated 10/100 Ethernet PHY with HP Auto-MDIX

　　Implements Reduced Power Operating Modes

　　Minimized BOM Cost

　　Single 25 MHz crystal (Eliminates cost of separate crystals for USB and Ethernet)

　　Built-in Power-On-Reset (POR) circuit (Eliminates requirement for external passive or active reset)

　　LAN9514 目标应用:

　　Desktop PCs

　　Notebook PCs

　　Printers

　　Game Consoles

　　Embedded Systems

　　Docking Stations

　　LAN9514 主要优势:

　　USB Hub

　　Fully compliant with Universal Serial Bus Specification Revision 2.0

　　HS (480 Mbps), FS (12 Mbps), and LS (1.5 Mbps) compatible

　　Four downstream ports, one upstream port

　　Port mapping and disable support

　　Port Swap: Programmable USB diff-pair pin location

　　PHY Boost: Programmable USB signal drive strength

　　Select presence of a permanently hardwired USB peripheral device on a port by port basis

　　Advanced power saving features

　　Downstream PHY goes into low power mode when port power to the port is disabled

　　Full Power Management with individual or ganged power control of each downstream port.

　　Integrated USB termination Pull-up/Pull-down resistors

　　Internal short circuit protection of USB differential signal pins

　　High-Performance 10/100 Ethernet Controller

　　Fully compliant with IEEE802.3/802.3u

　　Integrated Ethernet MAC and PHY

　　10BASE-T and 100BASE-TX support

　　Full- and half-duplex support with flow control

　　Preamble generation and removal

　　Automatic 32-bit CRC generation and checking

　　Automatic payload padding and pad removal

　　Loop-back modes

　　TCP/UDP checksum offload support

　　Flexible address filtering modes

　　One 48-bit perfect address

　　64 hash-filtered multicast addresses

　　Pass all multicast

　　Promiscuous mode

　　Inverse filtering

　　Pass all incoming with status report

　　Wakeup packet support

　　Integrated Ethernet PHY

　　Auto-negotiation

　　Automatic polarity detection and correction

　　HP Auto-MDIX

　　Energy Detect

　　Power and I/Os

　　Three PHY LEDs

　　Eight GPIOs

　　Supports bus-powered and self-powered operation

　　Internal 1.8v core supply regulator

　　External 3.3v I/O supply

　　Miscellaneous features

　　Optional EEPROM

　　Optional 24MHz reference clock output for partner hub

　　IEEE 1149.1 (JTAG) Boundary Scan

　　Software

　　Windows 2000/XP/Vista Driver

　　Linux Driver

　　Win CE Driver

　　MAC OS Driver

　　EEPROM Utility

　　Packaging

　　64-pin QFN, lead-free RoHS compliant

　　Environmental

　　Commercial Temperature Range (0℃ to +70℃)

　　±8kV HBM without External Protection Devices

　　±8kV contact mode (IEC61000-4-2)

　　±15kV air-gap discharge mode (IEC61000-4-2)

　　图1. LAN9514 内部方框图

　　图2.LAN9514采用USB电源开关的端口电源控制框图

　　图3.LAN9514采用多晶硅熔丝的端口电源控制框图

　　EVB9514 评估板

　　The EVB9514 is an Evaluation Board (EVB) that utilizes the LAN9514 to provide a four port USB 2.0 hub with an integrated 10/100 Ethernet controller. The EVB9514 provides USB connectivity via one type B upstream USB connector and four type A downstream USB connectors. An RJ-45 integrated magnetics Ethernet jack with link/activity LEDs provides 10/100 Ethernet connectivity. The EVB9514 supports both bus-powered and self-powered modes of operation.

　　The EVB9514 includes a 512x8 Microwire EEPROM that may be used to automatically load USB descriptors, USB device configuration, and the MAC address upon reset. A GPIO header provides access to the LAN9514s general purpose I/O signals. For debugging purposes, the internal LAN9514 TAP controller is accessible via the included JTAG header.

　　EVB9514 Block Diagram

　　图4.EVB9514 评估板方框图

　　图5.EVB9514 评估板电路图(1)

　　图6.EVB9514 评估板电路图(2)

　　图7.EVB9514 评估板电路图(3)

　　EVB9514 评估板材料清单(BOM):